3 ms·
In an old house? Rarely. I've been able to fit 100mm of PIR (Polyisocyanurate) under my roof (1920s Dutch terraced brick house), and that is pushing it without
by Freak_NL 4y ago
In an old house? Rarely. I've been able to fit 100mm of PIR (Polyisocyanurate) under my roof (1920s Dutch terraced brick house), and that is pushing it without eating too much into your living space.
PIR is a great solution for space-constrained insulation though: 0.022W/m²K, so 100mm gives you a thermal resistance of 4.54m²K/W. It's the equivalent of 200mm of mineral wool with a thermal insulance of 0.044W/m²K.