Hello,
I am about to embark on framing, boarding and insulating my workshop (double garage, single skin) and I have a question about ventilation.
I have done a lot of research on cold vs warm insulation and I am going for a cold insulation with PIR boards / vapour barrier inside the insulation.
One thing I can’t get my head around is venting - I understand the basics of stopping moisture escaping from within the insulated area to the cavity, and the purpose of the vapour barrier, but I also know the moisture needs to escape somehow and ventilate. The two seem at odds to me - is installing a view vents just a way of controlling where the air gets in/ out?
Also, how come vents don’t compromise / negate all the insulation?
Finally, the garage door seems a bit of a conundrum - do I just insulate it as best as possible and accept some heat loss? (I will need to use it now and again, perhaps once a month)
Thank you in advance
Rich