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gillies
I have a load of PIR insulation board that I picked up for free that I’ve been planning on fitting between my ground floor joists to insulate the floor. I have access from below in the basement/crawl space so it should be relatively straightforward and I hope it’ll make a difference to warmth. Now I’ve got around to starting the job though, I’m second guessing.
Is it a good idea or am I setting myself up for potential damp issues with the joists? The space below seems to have fairly good ventilation with multiple vent bricks, I’m just worried I’ll cram this PIR around the joists and make them rot somehow.