Insulation on Garage Wall

fleetingmind

One of the walls in our bedroom backs onto the back of our garage and on that wall in the bedroom we have fitted wardrobes and currently the clothes get a little cold/damp. 

We were thinking of putting some insulation boards on that wall in the garage to help keep it a little warmer in the wardrobe/bedroom. 

Is there any reasons why this wouldn't be advisable or a good idea e.g ventilation etc

Also what would you use to attach the insulation to the wall in the garage?

Thanks

grumbler

fleetingmind said:

Is there any reasons why this wouldn't be advisable or a good idea e.g ventilation etc

I don't see any.

Also what would you use to attach the insulation to the wall in the garage?

This depends on the type of insulation. Insulated plasterboard I'd screw, but there are special adhesives.

fleetingmind

grumbler said:

fleetingmind said:

Is there any reasons why this wouldn't be advisable or a good idea e.g ventilation etc

I don't see any.

Also what would you use to attach the insulation to the wall in the garage?

This depends on the type of insulation. Insulated plasterboard I'd screw, but there are special adhesives.

Thank you. Was thinking of using something like Celotex and using a adhesive to stick to the wall. 

Section62

fleetingmind said:

grumbler said:

fleetingmind said:

Is there any reasons why this wouldn't be advisable or a good idea e.g ventilation etc

I don't see any.

Also what would you use to attach the insulation to the wall in the garage?

This depends on the type of insulation. Insulated plasterboard I'd screw, but there are special adhesives.

Thank you. Was thinking of using something like Celotex and using a adhesive to stick to the wall. 

Whatever you use, you need to be aware of the flammability of the material, especially in a space such as a garage where flammable materials and accelerants are commonly stored.  When fixing be particularly careful not to create voids which would create paths that would aid the spread of fire.

FreeBear

Section62 said:

fleetingmind said:

grumbler said:

fleetingmind said:

Is there any reasons why this wouldn't be advisable or a good idea e.g ventilation etc

I don't see any.

Also what would you use to attach the insulation to the wall in the garage?

This depends on the type of insulation. Insulated plasterboard I'd screw, but there are special adhesives.

Thank you. Was thinking of using something like Celotex and using a adhesive to stick to the wall. 

Whatever you use, you need to be aware of the flammability of the material, especially in a space such as a garage where flammable materials and accelerants are commonly stored.  When fixing be particularly careful not to create voids which would create paths that would aid the spread of fire.

Celotex/Kingspan type boards would be the most effective for price/performance, but the stuff is pretty flammable (it was used on the Grenfell tower). EPS/XPS is no better in that respect.. Cork boards would be my choice - Use a mixture of adhesive fixings and screws (hammer fixings with a mushroom head). Give it a coat of render for a little more fire resistance. It will be some 15-20% more expensive than Celotex, but won't go up in flames.

markin

Simply using fire plasterboard would solve any risk, the same with any foam in a can you use.

But if the was a fire the smoke would already stay in the garage unless its already a death trap waiting to happen

ThisIsWeird

Fleetingmind, how much more disruption/work would it be to line that bedroom wall instead? Can your wardrobes be removed easily for this? If so, it would almost certainly be more effective, possibly a lot more so - if, say, that wall has a cavity.

ThisIsWeird

These are 'fitted' 'robes? With what type of back panels? 

Could folk speculate on how effective it could be if these panels were removed, ~1" of Celotex fitted tightly in there, and the backs replaced?

Section62

markin said:

Simply using fire plasterboard would solve any risk, the same with any foam in a can you use.

But if the was a fire the smoke would already stay in the garage unless its already a death trap waiting to happen

The primary issue isn't so much about the smoke, rather the additional fire load the insulation material represents, along with the potential for badly installed insulation creating ideal 'chimney effect' conditions.

The designed level of resistance to the spread of fire and smoke the garage provides would be based on certain assumptions about the size and nature of the fire.  If alterations are made which make those assumptions no longer valid, then the performance of the fire/smoke resistance will be sub-optimal.  E.g. the 'chimney effect' can concentrate fierce heat over a small area of ceiling meaning any fire protection applied to the ceiling may fail much quicker than the design expectation.

If the insulation has been installed improperly then adding fire plasterboard over the top may simply add to the problem by enhancing the chimney effect.  It isn't that simple to solve fire risks.

Whether this matters or not depends to an extent on whether the garage is integral, or simply abuts the main house, and what the wall between the garage and bedroom is constructed from.

Section62

ThisIsWeird said:

These are 'fitted' 'robes? With what type of back panels? 

Could folk speculate on how effective it could be if these panels were removed, ~1" of Celotex fitted tightly in there, and the backs replaced?

I suspect the problem is primarily due to the wardrobes, not the insulation level of the wall.  It could be that the wardrobes themselves are acting as a layer of insulation keeping the room warmth away from the external/garage wall - leading to the rear part of the wardrobes feeling colder/damper.

If so, the solution I'd investigate first would be allowing (more) warm room air to circulate between the back of the wardrobe and the wall.