{"id":8084,"date":"2026-04-29T16:07:06","date_gmt":"2026-04-29T14:07:06","guid":{"rendered":"https:\/\/knaufpartner.pl\/ocieplenie-poddasza-welna-mineralna\/"},"modified":"2026-06-24T14:53:34","modified_gmt":"2026-06-24T12:53:34","slug":"wykorzystanie-welny-szklanej-do-ocieplenia-poddasza","status":"publish","type":"post","link":"https:\/\/sklep.pkcomplex.pl\/en\/wykorzystanie-welny-szklanej-do-ocieplenia-poddasza\/","title":{"rendered":"Using glass wool to insulate the loft"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"8084\" class=\"elementor elementor-8084\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"wd-negative-gap elementor-element elementor-element-e7c3f4d e-flex e-con-boxed e-con e-parent\" data-id=\"e7c3f4d\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3adfe903 color-scheme-inherit text-left elementor-widget elementor-widget-text-editor\" data-id=\"3adfe903\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><img decoding=\"async\" src=\"https:\/\/sklep.pkcomplex.pl\/wp-content\/uploads\/2026\/04\/welna-min.jpg\" alt=\"welna mineralna\" \/><\/p><p><strong><a href=\"https:\/\/sklep.pkcomplex.pl\/en\/ocieplenie-fundamentow-jaki-styropian-wybrac\/\">In a previous post <\/a>We\u2019ve already mentioned the benefits of insulating foundations with polystyrene \u2013 but what about roof insulation? It is estimated that as much as 25% of heat from a building can be lost through poorly insulated rafters, so look after your home and save on your bills by choosing the right materials. Knauf Insulation\u2019s glass mineral wool is excellent at protecting a building from the cold, but that\u2019s not the only reason it\u2019s the ideal choice. Why is it the best solution? Find out by reading the article below!<\/strong><\/p><nav>Table of contents<ul><li><a href=\"#1\">Properties of Knauf Insulation mineral wool<\/a><\/li><li><a href=\"#2\">Glass wool or rock wool?<\/a><\/li><li><a href=\"#3\">Insulating the loft \u2014 step by step<\/a><\/li><li><a href=\"#4\">A considerable cost, but one that pays for itself<\/a><\/li><\/ul><\/nav><h2 id=\"1\">Properties of Knauf Insulation mineral wool<\/h2><p>Despite its name, it is not derived from sheep. It is produced by melting basalt (in the case of the rock version) or quartz sand (in the case of glass wool). Mixed with mineral additives, the materials undergo a defibration process, and a so-called binder is introduced into the newly formed fibres. Knauf Insulation\u2019s mineral wool owes its structure to its near-total non-combustibility, water-repellency, as well as its acoustic and thermal insulation properties. Thanks to production using ECOSE\u00ae technology, we can also choose to use it as part of our environmental protection efforts \u2014 this method is 70% less energy-intensive compared to traditional methods of manufacturing mineral wool. Its production utilises rapidly renewable and biotechnological raw materials instead of petroleum-derived chemicals, which include the commonly used formaldehyde. As a result, the environmental footprint is reduced, and the Eurofins Gold certification ensures high air quality in buildings insulated with Knauf Unifit wool.<\/p><h2 id=\"2\">Glass wool or rock wool?<\/h2><p>Which type of Knauf Insulation mineral wool is better? Both offer exceptional sound insulation and can withstand extremely high temperatures \u2014 although in this respect, the glass wool version is outperformed by the rock wool version. Furthermore, they are water-repellent, which prevents water from penetrating their structure. It is worth noting that it is essential for thermal insulation materials not to absorb moisture, as it is precisely this impermeability that makes them such effective protection. Their thermal insulation properties are also invaluable. However, there are two key differences between them \u2014 glass wool, thanks to its fine fibres, is more flexible and resilient, whilst its dense rock wool counterpart can withstand greater structural loads. Thus, the most significant difference appears to be that they are used for the thermal insulation of different types of surfaces. Rock wool mats are recommended for insulating building fa\u00e7ades and flat roofs, whilst their flexible, glass-fibre counterpart is recommended for steeply pitched attics. It is therefore possible to use both types in a single structure, taking their differing properties into account.<\/p><h2 id=\"3\">Insulating the loft \u2014 step by step<\/h2><p>Warm air is lighter than cold air because its molecules are less densely packed, hence the common saying that heat \u201eescapes through the roof\u201d. Properly installed insulation prevents this from happening, whilst also ensuring lower heating costs for a well-insulated building. Despite the many advantages of mineral wool, it is also important to remember that proper preparation for the installation of the mats is just as important. If the rafters are allowed to remain damp, mould that is hazardous to health may develop beneath the insulation. Below, we will therefore outline the steps for properly preparing the substrate for the installation of Knauf Insulation\u2019s reliable mineral wool mats, followed by their expert installation.<\/p><h3>Preparing the loft<\/h3><p>The first step is to select materials suitable for the type of roof structure. If a temporary covering membrane has been used to protect against damp, the thickness of the mineral wool can be equal to the height of the rafters. However, if you have opted for full boarding instead of a membrane, you must remember to allow for a minimum 2-centimetre ventilation gap between the boards and the insulation by subtracting this from the rafter height. This will ensure that moisture is properly drained away and prevent the formation of mould. At this stage, you must also ensure that the roof truss is watertight \u2014 it must not be bent in any way or affected by fungal growth. It must be thoroughly maintained, and all services running alongside it must be sealed. At the very end of the preparatory stage, we need to carefully inspect the area around the wall plate, as this is where the greatest amount of warm air escapes.<\/p><h3>Preparing the frames<\/h3><p>As proper thermal insulation involves laying the wool in two layers, we must first fit the spacer hangers onto the supporting frames. The supports should allow the mats to fit as tightly as possible against one another. To achieve this, it will be necessary to take the appropriate measurements \u2014 the sum of the two mat widths and the length of the frame profile are particularly important dimensions for us. Once the frames are secured, measure the width between the rafters again and cut the material to that length. With Knauf Insulation mineral wool, this is extremely straightforward thanks to the markings on its surface. Remember that you must allow an extra 2 centimetres when measuring, so that the mat fits as snugly as possible within the stud frame.<\/p><h3>Fitting the mats<\/h3><p>Once the mats have been cut to size, it is time to fit them. The two-centimetre allowance left earlier will allow the wool to be fitted with a slight press. However, if there is a membrane beneath our frame, we must remember not to press the mats in too forcefully \u2014 this could damage the material beneath the insulation. Let\u2019s not forget to slot them into the fitted profile either. Once we\u2019ve filled all the gaps with offcuts or strips of mineral wool, we can start laying the second layer of mats at right angles.<\/p><p><img decoding=\"async\" src=\"https:\/\/sklep.pkcomplex.pl\/wp-content\/uploads\/2026\/04\/welnamin-min.jpg\" alt=\"we\u0142na mineralna\" \/><\/p><h3>Protection for mats<\/h3><p>Once we have laid two layers of thermal insulation, we can proceed to cover the mineral wool with a vapour barrier, which will ensure maximum thermal insulation for the building. You should add an extra 10 centimetres to the required dimensions of the foil. This excess will allow us to secure it tightly to the wall using sealant or tape. This approach will ensure we have enough material to properly install insulation that prevents water vapour from entering the interior of the house. Plasterboard can then be fixed to the surface prepared in this way, and the rest of the loft can be finished.<\/p><h2 id=\"4\">A considerable cost, but one that pays for itself<\/h2><p>Mineral wool is a more expensive material than, for example, polystyrene used for insulating buildings, but it is an investment for the future. When installed correctly, it protects the house for years and is less susceptible to damage and ageing. The insulating performance of Knauf Unifit mineral wool rolls depends on the thermal conductivity coefficient \u03bbD, where a lower value indicates better protection for the loft. It is precisely this coefficient that also determines the price of a single roll.<\/p><p><em>As you can see, therefore, insulating your home using mineral wool mats is a wise investment that helps you save on heating costs and protects your home. Our range includes <a href=\"https:\/\/sklep.pkcomplex.pl\/en\/\">online building materials shop <\/a>You\u2019ll find a range of products from Knauf Insulation, a well-known and highly regarded manufacturer of reliable, warm mineral wool.<\/em><\/p>\t\t\t\t\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>In a previous post, we already mentioned the benefits of insulating foundations with polystyrene \u2013 but what about roof insulation? According to estimates<\/p>","protected":false},"author":1,"featured_media":9009,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[887],"tags":[],"class_list":["post-8084","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aktualnosci"],"_links":{"self":[{"href":"https:\/\/sklep.pkcomplex.pl\/en\/wp-json\/wp\/v2\/posts\/8084","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sklep.pkcomplex.pl\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sklep.pkcomplex.pl\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sklep.pkcomplex.pl\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sklep.pkcomplex.pl\/en\/wp-json\/wp\/v2\/comments?post=8084"}],"version-history":[{"count":6,"href":"https:\/\/sklep.pkcomplex.pl\/en\/wp-json\/wp\/v2\/posts\/8084\/revisions"}],"predecessor-version":[{"id":9008,"href":"https:\/\/sklep.pkcomplex.pl\/en\/wp-json\/wp\/v2\/posts\/8084\/revisions\/9008"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sklep.pkcomplex.pl\/en\/wp-json\/wp\/v2\/media\/9009"}],"wp:attachment":[{"href":"https:\/\/sklep.pkcomplex.pl\/en\/wp-json\/wp\/v2\/media?parent=8084"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sklep.pkcomplex.pl\/en\/wp-json\/wp\/v2\/categories?post=8084"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sklep.pkcomplex.pl\/en\/wp-json\/wp\/v2\/tags?post=8084"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}