{"id":8755,"date":"2025-09-05T17:33:00","date_gmt":"2025-09-05T14:33:00","guid":{"rendered":"https:\/\/www.ehtasauna.fi\/?p=8755"},"modified":"2026-05-04T14:03:55","modified_gmt":"2026-05-04T11:03:55","slug":"pihasaunan-perustukset-abc","status":"publish","type":"post","link":"https:\/\/www.ehta.fi\/en\/pihasaunan-perustukset-abc\/","title":{"rendered":"Foundations for a sauna or a summer cottage \u2013 a guide to choosing foundations"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"8755\" class=\"elementor elementor-8755\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2013d59f e-flex e-con-boxed e-con e-parent\" data-id=\"2013d59f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a8d1143 elementor-widget elementor-widget-text-editor\" data-id=\"a8d1143\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Laying the foundations is the first and extremely important step on a cottage or sauna building site. The foundations of a garden sauna or cottage are literally the basis for everything and are difficult to repair afterwards. Proper foundations ensure that the building withstands time and does not, for example, warp or sink.<\/p>\n<p><strong>Foundation work involves three stages:<\/strong><\/p>\n<ol>\n<li>Soil investigation and foundation method selection.<\/li>\n<li>Foundation design<\/li>\n<li>Foundation construction<\/li>\n<\/ol>\n<p>The location of the building and the soil in the area significantly influence the choice of foundation method, so the work always begins with a soil investigation.<\/p>\n<p><strong>This guide provides clear information on selecting the right type of foundations and instructions for building different types of foundations.<\/strong><\/p>\n<p><strong>\ud83d\udc49 <\/strong><a href=\"https:\/\/www.ehta.fi\/en\/mokin-ja-pihasaunan-perustukset-talvitoimitus\/\">Read also why winter delivery is worthwhile and how it affects foundation work.<\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-57ad0ab elementor-widget elementor-widget-text-editor\" data-id=\"57ad0ab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Soil surveying provides the foundation for selecting the foundations for both the cabin and the garden sauna.<\/h2>\n<p>Soil testing provides the basis for choosing the foundations for a cottage or a garden sauna. If the soil composition is unknown, soil testing is the first step towards your dream sauna.<\/p>\n<p><strong>Soil survey<\/strong> <strong>have it done by a professional<\/strong> or DIY. The previous owners of the site can also provide valuable information about the soil. The aim of the research is to clarify the soil <strong>structure<\/strong>, <strong>load capacity<\/strong> and <strong>groundwater level<\/strong>.<\/p>\n<p><strong>Each soil behaves differently:<\/strong><\/p>\n<ul>\n<li>from the other it flows down quickly,<\/li>\n<li>others bind moisture,<\/li>\n<li>most soils freeze hard,<\/li>\n<li>Others hardly at all.<\/li>\n<\/ul>\n<p>In Finland, the behaviour of moisture and frost heave pose the most significant risks to foundations. The power of nature is astonishing: frost heave moves soil particles both vertically and horizontally \u2013 regardless of the heavy building on top. Therefore, a wrongly chosen or poorly constructed foundation can backfire through settlement of the building or structural damage.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4ff0219 elementor-widget elementor-widget-text-editor\" data-id=\"4ff0219\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Soil types and their effect on foundation selection.<\/h3>\n<p>The most common methods for building a cottage or garden sauna are screw pile, pillar, and light foundations. These are used depending on the soil conditions as follows:<\/p>\n<ul>\n<li><strong>On soft, loamy soil<\/strong> Is well suited\u00a0<a href=\"#1.-Ruuvipaaluperustus\" rel=\"noopener\">Screw pile foundation<\/a>.<\/li>\n<li><strong>To bedrock and moraine<\/strong> is usually chosen <a href=\"#2.-Pilariperustus\">traditional pad foundation<\/a>.<\/li>\n<li><strong>Uncompacted subsoil<\/strong> such as rock or sand\/gravel allow for a lighter foundation method.<a href=\"#3.-Kevytperustus\">light foundation<\/a>).<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0bb357a elementor-widget elementor-widget-text-editor\" data-id=\"0bb357a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Consult the table to see which foundation is suitable for which soil type:<\/strong><\/p>\n<p><!-- \/wp:paragraph -->\n\n<!-- wp:table --><\/p>\n<figure class=\"wp-block-table\">\n<table style=\"height: 214px;\" width=\"346\">\n<tbody>\n<tr>\n<td>\u00a0<\/td>\n<td>Screw pile foundation<\/td>\n<td>Pillar foundation<\/td>\n<\/tr>\n<tr>\n<td>Kallio<\/td>\n<td>\u2013<\/td>\n<td>x<\/td>\n<\/tr>\n<tr>\n<td>Gravel\/sand<\/td>\n<td>x<\/td>\n<td>x<\/td>\n<\/tr>\n<tr>\n<td>Moraine<\/td>\n<td>x*<\/td>\n<td>x<\/td>\n<\/tr>\n<tr>\n<td>Sand\/silt<\/td>\n<td>x<\/td>\n<td>x<\/td>\n<\/tr>\n<tr>\n<td>Savi<\/td>\n<td>x<\/td>\n<td>x<\/td>\n\n<\/tr>\n<tr>\n<td>Peat slurry<\/td>\n<td>\u2013<\/td>\n<td>\u2013<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n<p><!-- \/wp:table -->\n\n<!-- wp:paragraph --><\/p>\n<p>Large stones may be present in the moraine that could hinder the installation of screw piles.<\/p>\n<p><!-- \/wp:paragraph -->\n\n<!-- wp:paragraph --><\/p>\n<p><!-- \/wp:paragraph -->\n\n<!-- wp:paragraph --><\/p>\n<p>Peat, silt, and other organic subsoils must always be removed from beneath foundations.<\/p>\n<p>Based on our experience, the traditional pier foundation is the most common foundation method.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3d3b292 elementor-widget elementor-widget-text-editor\" data-id=\"3d3b292\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<figure id=\"attachment_8831\" aria-describedby=\"caption-attachment-8831\" style=\"width: 1024px\" class=\"wp-caption alignnone\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-8831\" src=\"https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_8375-1024x682.jpg\" alt=\"Harmaa perustuspilari hirrest\u00e4 rakennetun, tumman pihasaunan nurkan alla.\" width=\"1024\" height=\"682\" srcset=\"https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_8375-1024x682.jpg 1024w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_8375-600x400.jpg 600w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_8375-300x200.jpg 300w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_8375-768x512.jpg 768w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_8375-1536x1024.jpg 1536w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_8375.jpg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-8831\" class=\"wp-caption-text\">The most popular foundation method is a pier foundation. A ventilated subfloor supports the moisture management of a garden sauna or sauna cabin.<\/figcaption><\/figure>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8a17331 elementor-widget elementor-widget-text-editor\" data-id=\"8a17331\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>How to choose the right foundations for your cabin or sauna \u2013 instructions and costs<\/h2>\n<p>The foundation for the sauna or cottage will ultimately be chosen. <strong>soil<\/strong>, <strong>factors<\/strong> <strong>competence<\/strong> and <strong>preferences<\/strong> accompanied by. Once the soil structure is known, the final selection can be made, taking other factors into account.<\/p>\n<p>Typically, a screw pile or pier foundation is chosen for building a garden sauna or cabin; if the ground conditions permit, a raft foundation can also be used.<\/p>\n<p><strong>But how do you make the right choice? And how much do foundations cost?<\/strong><\/p>\n<p>You will soon get answers to these questions, as next you will receive easily understandable information about the three most common basic types of foundations.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a2141a9 elementor-widget elementor-widget-text-editor\" data-id=\"a2141a9\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"1.-Ruuvipaaluperustus\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Screw pile foundation<\/h3>\n<p>Screw pile foundations are a newer alternative to traditional concrete or brick foundations. A screw pile, also known as a ground screw, is a steel pile that is screwed into the ground below the frost line.<\/p>\n<p>There are screw piles <strong>hand-wound<\/strong> a lighter model that can be self-installed and a more robust one <strong>machine-installable<\/strong> The machine can be rented or purchased with screw piles pre-installed.<\/p>\n<p>Screw piling <strong>Does not require significant earthworks<\/strong> Yes, pile driving is also possible in tight and difficult-to-access locations, as well as in damp soil, as long as the length of the screw pile is chosen correctly. The pile must be installed<strong> under the router<\/strong>, so that it stays in place.<\/p>\n<p><strong>Screw piles are not suitable for rocky or stony ground.<\/strong>, as they are screwed into the ground, with larger stones preventing the installation of the pile. If you still want to choose a screw pile as a foundation method, stones can be removed from the pile locations with an excavator and replaced with more level soil. However, this will likely be more expensive than, for example, a pillar foundation.<\/p>\n<h4>Suitability<\/h4>\n<p>+ Sandy soil, loam, moraine<br \/>+ Suitable for all Ehta's garden saunas, sauna cottages and cottages.<\/p>\n<p>\u2013 Not suitable for rocky or stony soil.<\/p>\n<h4>Construction<\/h4>\n<p>+ Doesn't leave tracks in the yard.<br \/>Can also be installed in winter.<br \/>+ Quick installation method \u2013 no drying time.<br \/>Specifically, the manually installed model is affordable.<\/p>\n<p>\u2013 In some cases, it can be more expensive than a pile foundation when installed by a professional.<\/p>\n<h4>Options and costs:<\/h4>\n<ul>\n<li>You can find self-installing hand-screw ground screws in all hardware stores.\n<ul>\n<li>Pile prices:<strong> \u00a320-\u00a360\/person.<\/strong><br \/>(Remember to choose a sufficiently long post that reaches below the frost line!)<\/li>\n<\/ul>\n<\/li>\n<li>Screw piles that are installed by machine are usually installed by a professional. (e.g. <a href=\"https:\/\/stopdigging.fi\/?gad_source=1&amp;gad_campaignid=19549551057&amp;gbraid=0AAAAACebQ8-o1sFH8TS3HOpr2ZoOsnTEN&amp;gclid=Cj0KCQjw8eTFBhCXARIsAIkiuOxwZBQnI2FNKpYG1h9AdQux6WcsqCkZ2rYXzucrxvDTVkLnbW1ux9waAi7HEALw_wcB\" target=\"_blank\" rel=\"noopener\">Stop digging<\/a> works throughout Finland.\n<ul>\n<li>Price of a pile with installation included:<strong> \u20ac200\u2013300 per couple<\/strong> (The location of the property can significantly affect the cost!)<\/li>\n<\/ul>\n<\/li>\n<li>DIY machine installation\n<ul>\n<li>Pile prices: <strong>\u20ac30-80 per item<\/strong>;<\/li>\n<li>Machine rental, e.g. from a hardware store:\u00a0<strong>80-150\u20ac\/day.<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<figure id=\"attachment_8832\" aria-describedby=\"caption-attachment-8832\" style=\"width: 1024px\" class=\"wp-caption alignnone\"><img decoding=\"async\" class=\"wp-image-8832\" src=\"https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/95643253_2797212760511083_3971724196127440896_n-1024x819.jpg\" alt=\"Mies asentamassa ruuvipaaluperustuksia koneellisesti aurinkoisella s\u00e4\u00e4ll\u00e4. Taustalla piharakennus.\" width=\"1024\" height=\"819\" srcset=\"https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/95643253_2797212760511083_3971724196127440896_n-1024x819.jpg 1024w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/95643253_2797212760511083_3971724196127440896_n-600x480.jpg 600w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/95643253_2797212760511083_3971724196127440896_n-300x240.jpg 300w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/95643253_2797212760511083_3971724196127440896_n-768x614.jpg 768w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/95643253_2797212760511083_3971724196127440896_n-1536x1229.jpg 1536w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/95643253_2797212760511083_3971724196127440896_n.jpg 1875w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-8832\" class=\"wp-caption-text\">With a machine, a screw pile foundation is easier to install and the torque is sufficient even if stones are encountered.<\/figcaption><\/figure>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-71a7af7 elementor-widget elementor-widget-text-editor\" data-id=\"71a7af7\" data-element_type=\"widget\" data-e-type=\"widget\" id=\"2.-Pilariperustus\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>2. Pile foundation<\/h3>\n<p>Pile foundations are the most common method for building holiday homes and garden outbuildings. Extensive groundwork is not required for piles, and installation is generally straightforward when the foundation area is small.<\/p>\n<p>Building a sauna on pillars allows for good ventilation beneath the structure. This is a significant advantage for moisture management in sauna buildings.<\/p>\n<p>Pillar foundation<strong> requires frost protection<\/strong> even if the soil can freeze. If frost insulation is done carefully, a pile foundation is an excellent option even in frost-prone soil.<\/p>\n<p>When building on rock or sandy soil, frost insulation is not required. On rock, piles can also be founded directly onto the rock, and separate concrete footings are not needed to support the foundations.<\/p>\n<p>With over 1600 garden sauna experiences, most of our customers find that the BCE pillar, shown in the image below for example, is the easiest way to build the foundations for a garden sauna or sauna cabin.<\/p>\n<p>Suitability<\/p>\n<p>Suitable for frost insulation with all soil types. (Organic matter must be removed from beneath and replaced with gravel\/sand.)<br \/>+ An exceptionally easy solution for unfrozen ground and rock foundations.<\/p>\n<h4>Construction<\/h4>\n<p>Cheaper if made yourself.<br \/>Good load-bearing capacity, sturdy and durable<\/p>\n<p>\u2013 Requires ground excavation and frost insulation.<br \/>\u2013 Excavators are usually needed for groundwork, which increases costs.<\/p>\n<h4>Options and costs:<\/h4>\n<ul>\n<li>Ready foundation pillar BCE\n<ul>\n<li>The BCE pillar is a ready-made, downwards-tapering concrete pillar that does not require a separate foundation.<\/li>\n<li>On top of the pillar there is an adjustable pillar shoe.<\/li>\n<li>Price is <strong>\u00a360\u201370 per litre<\/strong><\/li>\n<\/ul>\n<\/li>\n<li>Reinforced concrete column\n<ul>\n<li>A block pillar is formed from a reinforced concrete footing and pillar blocks placed on top of it. The hollow centre of the pillar blocks is reinforced and filled with concrete. An adjustable column shoe can be added to the block pillar during casting.<\/li>\n<li>Price <strong>30\u201340 \u20ac per batch<\/strong><\/li>\n<\/ul>\n<\/li>\n<li>Cast-in-place concrete foundation and column\n<ul>\n<li>Pillars can also be cast entirely from concrete on site. In this case, a formwork is made for the footing and the pillar, which is reinforced and filled with concrete. An adjustable pillar shoe can be installed on top of the pillar.<\/li>\n<li>Price <strong>30\u201340 \u20ac per batch<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>The total costs must also take into account potential excavator work, crushed stone, and frost insulation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a50abdf elementor-widget elementor-widget-text-editor\" data-id=\"a50abdf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<figure id=\"attachment_8768\" aria-describedby=\"caption-attachment-8768\" style=\"width: 1024px\" class=\"wp-caption alignnone\"><img decoding=\"async\" class=\"wp-image-8768\" style=\"width: 1024px; height: 768px;\" src=\"https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_2900-1024x768.jpeg\" alt=\"Saunam\u00f6kin perustuspilari kulmasta kuvattuna. Rakennus j\u00e4\u00e4 irti maasta, mik\u00e4 mahdollistaa hyv\u00e4n alapohjan tuuletuksen ja kosteudenhallinnan.\" width=\"1024\" height=\"768\" srcset=\"https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_2900-1024x768.jpeg 1024w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_2900-600x450.jpeg 600w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_2900-300x225.jpeg 300w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_2900-768x576.jpeg 768w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_2900-1536x1152.jpeg 1536w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/IMG_2900.jpeg 2000w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-8768\" class=\"wp-caption-text\">BCE pillars are a popular choice for building the foundations of a log cabin and a garden sauna.<\/figcaption><\/figure>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-57e46ba elementor-widget elementor-widget-text-editor\" data-id=\"57e46ba\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Instructions for foundation dimensioning:<\/h2>\n<p>Foundations must always be constructed precisely according to the building's measurements. When foundations are made for a pre-fabricated cabin or sauna, particular attention must be paid to dimensional accuracy.<\/p>\n<p>Prefabricated buildings are made precisely to measurements, and the same is required of the foundations. Otherwise, it simply won't be possible to place the sauna or cabin onto the foundations.<\/p>\n<ul>\n<li>The longitudinal tolerance in measurement may be no more than \u00b1 20 mm and the vertical tolerance may be no more than \u00b1 5 mm.<\/li>\n<li>If adjustable foundation piers are used, they make it easy to adjust the final centimetres to the same height.<\/li>\n<li>The squareness of the foundations is checked <strong>Cross-channel<\/strong> once it has been confirmed that the opposite sides of the foundation are of equal length, it is then measured to ensure that both diagonal measurements* are the same. When all these measurements match, the corners of the foundation are square, i.e. <strong>At a 90-degree angle<\/strong>.<br \/>Diagonal means the measurement from corner to corner of a building.<\/li>\n<\/ul>\n<p><strong>Tip:<\/strong> When constructing foundations, also consider a drainage pipe for rainwater if there is a need for one.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9317a61 elementor-widget elementor-widget-text-editor\" data-id=\"9317a61\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<figure id=\"attachment_8828\" aria-describedby=\"caption-attachment-8828\" style=\"width: 1024px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-8828\" src=\"https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/perustukset-mittakuva-1024x795.png\" alt=\"Saunam\u00f6kin ja sen edess\u00e4 olevan terassin pohjakuva, josta n\u00e4hd\u00e4\u00e4n my\u00f6s perustuspilarien paikat.\" width=\"1024\" height=\"795\" srcset=\"https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/perustukset-mittakuva-1024x795.png 1024w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/perustukset-mittakuva-600x466.png 600w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/perustukset-mittakuva-300x233.png 300w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/perustukset-mittakuva-768x596.png 768w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/perustukset-mittakuva-1536x1192.png 1536w, https:\/\/www.ehta.fi\/wp-content\/uploads\/2022\/09\/perustukset-mittakuva.png 1618w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption id=\"caption-attachment-8828\" class=\"wp-caption-text\">The site plans for the ready-made log cabin show the locations of the foundation pillars. In the dimension drawing, the measurements are usually given in millimetres.<\/figcaption><\/figure>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4de9ffc3 elementor-widget elementor-widget-text-editor\" data-id=\"4de9ffc3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Here's how to build the foundations for a cabin or garden sauna yourself<\/h2>\n<p>Often, cottage foundations are ordered ready-made, which is an easy and reliable choice. Foundations can also be made yourself, especially if you have previous construction experience.<\/p>\n<p><strong>When it comes to prefabricated houses and cottages, special care must be taken to ensure precise dimensions.<\/strong><\/p>\n<p>Below you will find instructions on how to carry out the two most common foundation methods yourself.<\/p>\n<h3>Build your own pile foundation \u2013 video and step-by-step instructions:<\/h3>\n<ol>\n<li><strong>Mark the building's location<\/strong> and the level on stakes and plumb lines. A spirit level and a laser are also good aids for this.<br \/><br \/><\/li>\n<li><strong>The topsoil will be excavated.<\/strong> at a depth of at least 50 cm. We recommend an excavator for this stage, but if the building is small and the soil is not too challenging, it can be done with a spade.<br \/><br \/><\/li>\n<li><strong>Lay a filter fabric on the base.<\/strong> Geotextile is placed between the sub-base and the fill material, so that the soil components do not mix together over time.<br \/><br \/><\/li>\n<li><strong>Put coarse aggregate<\/strong> Use gravel to fill the void left by the removed soil, in layers of approximately 15 cm. Use a spade, rake, and a piece of board about 1.5 metres long to help level it.<br \/><br \/><strong>Smooth and summarise<\/strong> Please check. A hand tamper may be sufficient for compacting a small building, but we generally recommend renting <strong>maraca<\/strong>, so that the soil is guaranteed to compact sufficiently.\n<p>(Enquire about rentals, for example, at hardware stores. The price is usually \u20ac40-60 \/ day).<br \/><br \/><\/p>\n<\/li>\n<li>\n<p><strong>Ensure the ground is level<\/strong> using a water jet or laser.<br \/><br \/><\/p>\n<\/li>\n<li>\n<p><strong>Lay the insulation boards<\/strong> The entire construction industry extends to approximately 1.5 m outside the sides of buildings. The thickness of the frost insulation is 10\u201320 cm, depending on the climatic conditions of the construction site.<br \/><br \/><\/p>\n<\/li>\n<li><strong>Add 10\u201315 cm of crushed stone on top of the frost insulation.<\/strong>. Compact carefully to avoid breaking the discs (light tamping or hand compaction is sufficient).<br \/><br \/><\/li>\n<li><strong>Do another interest rate check.<\/strong> and make sure all the pillar locations are on the same level. Use <strong>laser<\/strong> Taiwan <strong>spirit level<\/strong> Yes <strong>Sticking plaster<\/strong>. The finishing of the ground surface must be precise!<br \/><br \/>If you are unsure about the sufficient evenness of the ground surface, use <strong>height-adjustable<\/strong> <strong>foundation pillars<\/strong>, so that the height can still be fine-tuned afterwards.<br \/><br \/><\/li>\n<li>Lay the foundations and pillars yourself or install pre-cast foundation piles. Ensure there is adequate ventilation space between the finished building and the ground, usually 20 cm.<br \/><br \/>The size, height, and number of pillars are determined <strong>From the foundation measurement drawing provided by Ethan<\/strong>. It provides ready, clear instructions for building foundations once the soil structure is known.<\/li>\n<\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6af0d6b e-flex e-con-boxed e-con e-parent\" data-id=\"6af0d6b\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-792e57a elementor-widget elementor-widget-video\" data-id=\"792e57a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/www.youtube.com\\\/watch?v=xLrAlR6b2Xo&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1b04bbd e-flex e-con-boxed e-con e-parent\" data-id=\"1b04bbd\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3e638af elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"3e638af\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-349f398 elementor-widget elementor-widget-text-editor\" data-id=\"349f398\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Make your own screw pile foundation \u2013 video and step-by-step instructions:<\/h3>\n<ol>\n<li><strong>Mark the building's location<\/strong> mark out the locations of screw piles in the ground, for example with stakes or spray paint. The number of piles depends on the size and weight of the building. If you purchase a building from Ehto, we will deliver foundation drawings that show the correct number and exact placement of the piles.<br \/><br \/><\/li>\n<li><strong>Ensure dimensional accuracy.<\/strong> Remember to also check the diagonal measurements (linking to the previous one) to ensure the corners are square.<br \/><br \/><\/li>\n<li><strong>Remove topsoil<\/strong>, such as soil and peat at the pile locations. If necessary, place filter fabric and a thin layer of crushed stone in its place. If the ground is loose, this makes it easier to install the pile.<br \/><br \/><\/li>\n<li><strong>Install the piles either manually or with a dedicated machine<\/strong>.<br \/><br \/>\n<ol>\n<li><strong>This is how a screw pile foundation is made by hand.<br \/><\/strong><br \/>Hand assembly is only recommended for small structures and on easy, stone-free ground.<br \/><br \/><strong>Instructions<\/strong> Position the installation arm through the top holes of the post. Two people turn the arm around while simultaneously pressing the post downwards. Check for verticality with a spirit level during installation. Continue until the post is below the frost line. (Check the frost line for your local area!)<br \/><br \/><\/li>\n<li><strong>This is how a screw pile foundation is made with a machine.<\/strong><br \/><br \/>Screw pile machine hire is <strong>\u00a380\/day<\/strong>.<br \/><br \/>Making a screw pile foundation with a machine is faster and easier than manual installation. Furthermore, there's better torque if stones obstruct the pile's path. However, screw piles cannot be installed even with a machine in soil containing large stones.<br \/><br \/><strong>Instructions<\/strong> First, familiarise yourself with the machine's operating and safety instructions. Start the machine, place the pile in the machine's chuck and press it in while drilling. Check its verticality with a spirit level intermittently. Continue until the pile is below the frost line.<br \/><br \/><\/li>\n<\/ol>\n<\/li>\n<li><strong>Check the interest rates,<\/strong> so that the tops of the piles are level. You can also use adjustable pile shoes for fine-tuning the last few centimetres.<\/li>\n<\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ed2e9f3 elementor-widget elementor-widget-video\" data-id=\"ed2e9f3\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/www.youtube.com\\\/watch?v=gU_bNia5O40&quot;,&quot;start&quot;:3,&quot;end&quot;:125,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bbb0311 elementor-widget elementor-widget-text-editor\" data-id=\"bbb0311\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The K-rauta video on terrace screw pile foundations works just as well. <strong>to establish a pigsty<\/strong> with hand-installed screw piles.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-416f2de elementor-widget elementor-widget-video\" data-id=\"416f2de\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/www.youtube.com\\\/watch?v=aJlZYPgwYQ8&quot;,&quot;start&quot;:5,&quot;end&quot;:83,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-c3a1705 e-con-full e-flex e-con e-child\" data-id=\"c3a1705\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;jet_parallax_layout_list&quot;:[]}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2b7387c elementor-widget elementor-widget-text-editor\" data-id=\"2b7387c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The video from Paalupiste gives a good overview of different types of screw piles, their installation, and their applications.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c503ac8 elementor-widget elementor-widget-text-editor\" data-id=\"c503ac8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2>Detailed instructions and images for building foundations<\/h2>\n<ul>\n<li>Do you need help, more detailed instructions, or additional information regarding the foundations for a garden sauna?<\/li>\n<li>Are you interested in purchasing a sauna or another prefabricated building?<\/li>\n<\/ul>\n<p>Ehta is a company that manufactures finished saunas and cottages from Finnish log. Ehta is particularly known for its good value for money and warm, knowledgeable customer service.<\/p>\n<p>We have enablers and designers in our company \u2013 not salespeople.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab23666 elementor-widget elementor-widget-button\" data-id=\"ab23666\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/www.ehta.fi\/en\/ota-yhteytta\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Get in touch and ask for more information \u2013 we'd be happy to help!<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ad6a74d elementor-widget elementor-widget-text-editor\" data-id=\"ad6a74d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>Read also:<\/h4>\n<ul>\n<li><a href=\"https:\/\/www.ehta.fi\/en\/onnistunut-saunamokin-suunnittelu-kirsi-alm-siiran-vinkit\/\">Successful sauna cabin design and acquisition \u2013 Kirsi Alm-Siira's tips &gt;&gt;<\/a><\/li>\n<li><a href=\"https:\/\/www.ehta.fi\/en\/pihasauna-omakotitalon-pihaan-mita-se-vaatii\/\">A garden sauna for a detached house \u2013 what it requires<\/a><\/li>\n<li><a href=\"https:\/\/www.ehta.fi\/en\/pihasaunan-rakennuslupa-tarvitseeko-pihasaunan-rakentaminen-rakennusluvan\/\">Building permit for a sauna or sauna cabin from 2025 onwards &gt;&gt;<\/a><\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Perustusten teko on ensimm\u00e4inen ja eritt\u00e4in t\u00e4rke\u00e4 vaihe m\u00f6kki- tai saunaty\u00f6maalla. Pihasaunan tai m\u00f6kin perustukset ovat kirjaimellisesti kaiken perusta ja niit\u00e4 on hankala korjata j\u00e4lkik\u00e4teen. Kunnollinen perusta varmistaa, ett\u00e4 rakennus kest\u00e4\u00e4 aikaa eik\u00e4 esimerkiksi v\u00e4\u00e4nny tai vajoa. Perustusten teko sis\u00e4lt\u00e4\u00e4 kolme vaihetta: Maaper\u00e4tutkimus ja perustustavan valinta. Perustusten suunnittelu Perustusten teko Rakennuksen paikka ja alueen maaper\u00e4 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8768,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jet_sm_ready_style":"","_jet_sm_style":"","_jet_sm_controls_values":"","_jet_sm_fonts_collection":"","_jet_sm_fonts_links":"","footnotes":""},"categories":[33],"tags":[],"class_list":["post-8755","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Pihasaunan perustukset | Ehtasauna | Lue kattava opas!<\/title>\n<meta name=\"description\" content=\"Pihasaunan perustukset ovat t\u00e4rke\u00e4 osa saunan hankintaa | Millaiselle maaper\u00e4lle sopii pilariperustus? | Ent\u00e4 kevytperustus? | Lue lis\u00e4\u00e4!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ehta.fi\/en\/pihasaunan-perustukset-abc\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Pihasaunan tai m\u00f6kin perustukset - opas perustusten valintaan\" \/>\n<meta property=\"og:description\" content=\"Pihasaunan perustukset ovat t\u00e4rke\u00e4 osa saunan hankintaa | Millaiselle maaper\u00e4lle sopii pilariperustus? 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