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Loft Insulation

Posted: Thu Dec 29, 2022 3:55 pm
by AGT
I thought I would top up the loft insulation, didn’t have SWMBO or the kids, bought 4 rolls of 200mm thick from the orange shed, man that was a tight fit in the car.

Note to self just get 3 the next time!!

1 tin of squirty foam, some silicone for around pendant penetration points in the loft space and that’s me a quarter done…. So 400mm thick plus the old stuff underneath.


Will get some more next time I’m passing on my own.
Looking forward to seeing the next years consumption figures!

Re: Loft Insulation

Posted: Thu Dec 29, 2022 4:38 pm
by Oldgreybeard
Should make a significant difference. at our old place I found that just sealing up all the places where there were draughts made a heck of a difference. I rigged up an old electric car radiator fan in a bit of ply and taped it to an open widow, so I could try and feel where the worst air leaks were, by sucking air out of the house.

I thought I'd need to go around with one of those cans of smoke used to test smoke detectors to find the leaks. Wrong! Some of them howled like banshees as soon as the fan was turned on. All the usual suspects, around light fittings etc. Some oddball ones, though, like some light switches. The wires were in trunking, plastered into the wall, and this was all open to the loft space. Explained why several of the light switches had woodlice behind them, they must have crawled down from the loft!

Re: Loft Insulation

Posted: Sat Dec 31, 2022 7:23 am
by Joeboy
AGT wrote: Thu Dec 29, 2022 3:55 pm I thought I would top up the loft insulation, didn’t have SWMBO or the kids, bought 4 rolls of 200mm thick from the orange shed, man that was a tight fit in the car.

Note to self just get 3 the next time!!

1 tin of squirty foam, some silicone for around pendant penetration points in the loft space and that’s me a quarter done…. So 400mm thick plus the old stuff underneath.


Will get some more next time I’m passing on my own.
Looking forward to seeing the next years consumption figures!
I did pendants, light switches, sockets the lot. Felt a bit daft at the start but aftter a few feeling the air when down low and focused, that feeling departed. I didn't go as far as setting up a suck test but now I've read it I wish I had. One more project for the list (she's gonna go nuts).
Our house has been extended three times and I can't begin to list the holes and leaks found (right up to one the size of a fist a couple of months ago). I honestly went around the house about three times over the years and only now reasonably happy with the result. If i had a guess i'd say 60 modifications made. You will definitely see the difference on your bill. 👏

I have one loft boxroom left to attend to once back in Scotland. Its the place the snow melts first on roof. Last room! Woohoo!, :lol:

Re: Loft Insulation

Posted: Sat Dec 31, 2022 10:04 am
by AGT
I’ve done the sockets and switches when I’ve redecorated rooms, but thought as I was increasing the insulation in the loft would sear some silicone at the other side of the hole too!

It’s a big learning curve as 18 years ago when we moved in , the focus was making it warm, inviting, sympathetic upgrade to a Victorian property, reading on various forums and what goes on at work I’ve then stripped of lath and paster, insulated, siliconed, taped, plaster boarded, plastered back to the original finish so only me and SWMBO know it’s been done,

Did the same when we opened up the coomed ceiling in one of the bedrooms, so every room redecoration now get a thermal improvement first.

Did an extension 4/5 years ago, and 200mm pir in the walls, floors and it’s a toasty room.

All time, effort and hard work, but all good, and following others here I’ve now down some storage heaters, with A2A hopefully next winter, so thanks to everyone on the forum, I read all the posts and try to educate myself a bit on various subjects.

Need to brush up on pension knowledge!

Re: Loft Insulation

Posted: Sat Dec 31, 2022 10:14 am
by openspaceman
AGT wrote: Sat Dec 31, 2022 10:04 am I

Did the same when we opened up the coomed ceiling in one of the bedrooms, so every room redecoration now get a thermal improvement first.
I don't want to disturb the coombed ceilings in the bedrooms as one is still original lath and presumably lime plaster, the other is likely plasterboard as that room burned out between the wars.

I was considering gluing 50 or 75mm of plaster faced celotex on the sloping part and just losing a bit of roof space. I have already added 100mm of rockwool to the small loft and I could ad another 100mm over some of it but need a walkway up against the party wall .

First I need to get a plastic coffin tank up there and cut out the ancient galvanised one/

Re: Loft Insulation

Posted: Sat Dec 31, 2022 10:51 am
by Joeboy
Any thermal improvement is a win as long as moisture is taken into account. For this room it's a couple of coats of thermal paint, pack in some insulation where I can access in the loft wallside and see if there's some adjustment or seal kit replacement for the velux window. Light switches n socket sealing too of course.

First thing though, clear room completely and put the thermal imager on the room.

It's a small room so the finished effect should be apparent. All the best in all your coming New Year projects lads!

Re: Loft Insulation

Posted: Sat Dec 31, 2022 12:35 pm
by AGT
Joeboy wrote: Sat Dec 31, 2022 10:51 am
First thing though, clear room completely and put the thermal imager on the room.


I think this is the hardest part sometimes, having sufficient space and time to work, without turning the rest of the house into a building site….

Back from the orange shed with 2 more packs of loft legs…

Re: Loft Insulation

Posted: Mon Feb 27, 2023 10:31 am
by AGT
So completed this at the weekend, added loft stilts to the existing timbers to install a floor and stop the second layer getting squished, found some old rugs and laid them into the chipboard floor too, so just want to tidy up the shower extract ductwork and sit that on some acoustic material to dampen noise down and that’s the loft project finished..

Oh no want to improve the lighting too, get rid of the batten holders with HO skirts!

Well worth the effort