Solid Wall Insulation Option

[ScottishGasMan]

Have a 1920 solid brick semidetached cottage style house which Im doing alot of work in at the moment. Never lived in a house with solid walls and am a bit concerned it might get a bit chilly in the winter time (no heating or loft insualtion fitted at moment/floor boards up so always cold just now)

my bedroom has a full bare outside wall to the side, and to the front another outside wall with the window in it.

Another bedroom has only one outside wall with the main window in it.

and a bathroom which has a large outside wall no windows.

The walls sound hollow like they are stud walls, so after a little investigation earleyr it would appear that the outside walls are solid walls, with about an inch or so gap inside then laughing plaster kind of set up over them.

Seeing as I am going to have to plaster most of these walls anyway I am looking for an option to insulate them at the same time to keep more heat in.

But ive not used themal plasterboard or similar products before, so looking for some ideas of what to do.

Do I rip the laughing plaster walls+wood strips down and start again? do I need to be aware of any particular damp problems with that type of wall/house?

 

[noseall]

Strip the studs back to bare wood, fix 75mm celotex between studs and then fix 40mm celotex foil sandwich across the studs then fix foil backed 12.5mm plasterboards.

Laughing plaster = lathe & plaster.

Love it, made my day!

 

[ScottishGasMan]

lol never actually seen it written, god ive come up with worse than that before (hearings not the best)

should I leave any gap inbetween the celotex and brickwork to let stone breath /ventilation or will the foil backing deal with any problems like that?


also out of curiosity. looking at the energy report I got with the house it did suggest solid wall insualtion. Not once Ive DIY'd it and plastered it all up, no one will be any the wiser to it being fitted. If Im DIY'ing it, I wont have a reciept or report to say its done.

Would it be worth taking pictures as its being done and keeping reciepts of celotex for proof of its thickness to shop Home report guy if I every have them out making up a new one? Would they take that into consiteration when writing an energy performance certificate?

 

[noseall]

If you remove, replace or upgrade more than 24% of a buildings' thermally accountable material then building reg's (England) apply.

If this is the case then you need to submit an application.

 

[luisdesign]

Assuming 215mm (9") walls then an alternative is to simply use an insulated plasterboard. You can fit 62.5mm Kingspan K18 boards on 25mm battens to achieve the improved renovation target of 30W/M2K.

This includes bonded plasterboard already and means you don't need ot be cutting and fitting loads of boards between timber... so brings the messing around right down...

It would mean stripping all the laughing plaster ( ) out of course, but you would lose less internal space.

 

[kbdiy]

Laughing plaster = lathe & plaster.

Being pedantic, it's LATH & plaster. Laths being thin strips of wood (usually) whereas a LATHE is a machine used for turning wood or metal!

 

[noseall]

Laughing plaster = lathe & plaster.

Being pedantic, it's LATH & plaster. Laths being thin strips of wood (usually) whereas a LATHE is a machine used for turning wood or metal!

Cheers bud, theres nowt wrong with a bit of pedantry amongst friends.