25.11.2022 Ivan Landa
The classic subfloor is no more. Window and door substrates are now being prepared with modern materials that support the thermal insulation properties of the house and can also support heavy HS profiles. Purenit, a processed rigid foam (PIR) on a polyurethane base, has become a favourite quite quickly. Why is it better than a soffit, which has been perfectly adequate for decades?
In earlier times, doors and windows were nowhere near today's quality. This also meant that there was less emphasis on insulation - houses were not insulated and heat loss was simply taken into account. Today the situation is different, the emphasis is on low-energy and passive buildings, where the careful installation of windows and doors and the breaking of thermal bridges really matters. Simply put, when you spend big money on insulating glass and doors, you don't want heat escaping right underneath. That's what Purenit can help you with.
Do you have any blocks left over and you think they might still be useful just to shore up door or window frames? The truth is that this solution is quick and easy. But the blocks may not have enough load capacity to support a ton of HS portals. If too much pressure is put on the blocks, they can crumble and settle. The solution may be to undercrete, but even this may not always help, plus it is more difficult to prepare and can crack in heavy frosts.
Purenit is a unique polyurethane-based rigid foam (PIR) underlayment developed in Germany that has all the ingredients to be an ideal underlayment for doors and windows, especially for larger sizes (and therefore weight). And what are its main benefits?
Are you looking to build or renovate and need advice on the quantity and parameters of Purenite for your needs? Contact us, we are the experts in Purenit.
