Hi all,
One day I will post more on here with aswers rather than questions, but hope someoe has come accross this before,
I have taken up the floorboards in our lounge because of woodworm and it being horrendously cold we are goig to put in PIR boards between the joists, 2 part query:
In the first couple of pictures there has costantly been a 'wet bit' along the floor next to the wall, the ground outside is just above this and am thinking I will need to dig outside a bit to fix? - Or is this just normal and it comes and goes, or should the sub-floor really be bone dry?
The second set of pictures shows an air brick with the joist in that hole, I am using 50mm PIR, the joists are 100mm. Any advice about how to make this as air-tight as possible without compromising the air brick. My current thoughts is to staple some DPM at a sloped angle away from the air brick at roughly a 45 degree angle and then start the PIR from that point onwards, I would have the DPM going up the wall a bit too so hopefully any draughts go under the floor rather than into the room?
Second part of question 2: Also, anyone who has used PIR boards before, any suggestios for the really small gaps betwee joist and wall - just expanding mouse, then tape over the top?
Thank you as always in advace for any and all resposes.
Tom
One day I will post more on here with aswers rather than questions, but hope someoe has come accross this before,
I have taken up the floorboards in our lounge because of woodworm and it being horrendously cold we are goig to put in PIR boards between the joists, 2 part query:
In the first couple of pictures there has costantly been a 'wet bit' along the floor next to the wall, the ground outside is just above this and am thinking I will need to dig outside a bit to fix? - Or is this just normal and it comes and goes, or should the sub-floor really be bone dry?
The second set of pictures shows an air brick with the joist in that hole, I am using 50mm PIR, the joists are 100mm. Any advice about how to make this as air-tight as possible without compromising the air brick. My current thoughts is to staple some DPM at a sloped angle away from the air brick at roughly a 45 degree angle and then start the PIR from that point onwards, I would have the DPM going up the wall a bit too so hopefully any draughts go under the floor rather than into the room?
Second part of question 2: Also, anyone who has used PIR boards before, any suggestios for the really small gaps betwee joist and wall - just expanding mouse, then tape over the top?
Thank you as always in advace for any and all resposes.
Tom
