Interior wall insulation

WillyNelson

WillyNelson

WillyNelson

Soldato
Joined
28 Oct 2003
Posts
5,490
Location
Worthington-on-sea
The previous owners of our c.1910 mid terrace knocked out the internal walls between the hallway, lounge & dining room. While this makes for a nice open plan living space in a resonably narrow house it means that the downstairs is next to impossible to heat and noise travels straight up the open staircase to the bedrooms. With that in mind we're intending to reinstate the walls to as they once were, with both loune & dining room doors off the hall, but leave the lounge/dining wall open for double doors to be installed.

The replacement walls will be straight forward studwork with plasterboard and a skim coat. I was wondering what the benefits would be of insulating the cavity of the stud walls. We're a mid terrace so heat loss either side is negligable.

Would we really see a benefit of insulating the internal walls or is it not worth bothering?
 
I would definitely use something like Rockwool RWA45 Sound Insulation 100mm,or similar has the benefits of giving you thermal, acoustic and fire insulation.

Batts are easier to handle or you can get rolls.
 
Loads of questions I can think of

Are your rads controlled by TRV's
Do you have a central thermostat
Where is the thermostat located
Do you have an open fire in the front room

Generally yes you will see a benefit in adding insulation as long as your thermostat is in the same room you will save energy.
 
The only gain you will get is if you turn all the TRVs down and leave the front room up, then you won't use as much energy heating it up, if you had an open fire like we have you can almost turn the heating off if you don't mind the rest of the house being cold and just heat one room.

Assuming you are not talking about insulating the party walls.

It wouldn't hurt to include some insulation and it wouldn't be that much in quantity to include something of decent quality like a Kingspan product, beware though if you just heat one room and not the rest of the house you can start seeing problems with condensation and damp in the unheated spaces.
 
kingspan or celotex if your concern is only heat (it wont do much if anything at all for sound). Rockwook RWA45 as already said for a bit of everything. Sound is like water though and will always follow the easiest path so if you have door openings that aren't acoustically sealed then your unlikely to notice much difference.

Personally i've always full filled the studs because it gets rid of the horrible hollow sound of them and under current regs you should be putting some in there anyway.
 
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