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Suspended floor insulation

Polin_ka · 2021-10-26 20:03:36

Hi, we're planning to insulate our floor. I have been trying to work out how much insulation we would need as minimum legally. We won't be going for anything like kingspan as it's a bit expensive for us. Also, what else other than kingspan would you recommend? Mineral, sheep wool?

Comments

FreeBear Posts: 18,299 Forumite

15 November 2021 at 7:12PM

100mm PUR/PIR boards will be much better than 25mm (no, it doesn't matter which brand you use). But.... You do need to look at the thickness of the joists and be very careful not to compromise the underfloor ventilation. i.e. If you have 75x50mm joists resting on dwarf walls, you need to leave a sizeable gap for air to circulate above the dwarf walls and make sure you do not block off the air bricks.

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