insulating and making a single skin brick wall garage wall l

[atv2]

Hi all.
My garage is a single skin brick wall garage.

I would like to add some chipboard on the walls, or maybe even some melamine to make it look nice. What is the best way to do this ?

1. Batten out with tanalised wood. What is the best way to attach battens on wall? Just drill holes, use plugs and use long screws?
2. Put some sort of plastic (membrane) between the battens. What kind of membrane would i need here?
3. Put celotex or kingspan in between or leave empty?
4. And finally put chipboard or some hard board on top

My worry is condensation. Not sure if i already have airbricks on the current wall, but how do i ensure i dont get any condensation in the garage. There is no heatsource other then the attached house (garage is attached to the house). It does get very hot in summer and very cold in winter.

Should i drill holes or put vents in there? But then i loose insulation and warmth again

Thanks for your help.

[atv2]

Toltec said:

Is the garage wall damp, either rising from lack of dpc or penetration due to rail etc?

Hmm not sure, i dont think so. It's a single brick wall and the grouting is in a bad shape, but i patched that up. I do notice that books and paper does get affected by moisture over time.


So you are saying, OSB with plasterboard underneath that, and dot and dab it on the wall? I'm tempted to do dot and dab but i feel it's usually frowned upon. Would it not cause a cold bridge or moisture spots where the dab is ? Would you still put celotex or insulation behind the dot and dab attached boards?

Edited by Toltec on Tuesday 8th August 12:34

[atv2]

Hey Toltec,
Thanks a lot for your answer. Yes i do like the idea of OSB (or ply?) for the walls. I hate plasterboard. It will make for a nice workshop look. I thought about using melamine for a nice clean look but that's probably less of a good idea (moisture, will get scratched easily).

PS Did you ever have moisture problems with doing dot and dab on a single brick wall facing the outside?)

Ok, so
1. Glue celotex/kingspan/jablite stuff to the wall.
2. Screw OSB on top of that through to the brick (drill hole through brick, put in long wood screw with a plug in the wall i assume or?
3. Would i still need a permeable membrane her or could i do without? It's not going to be a room to live in, i just want it to look nice, don't care particulary about heat and there won't be a heat source (other then maybe a infrared lamp that is on occassionally).

Would condensation still have a way of going back out or should i drill some ventilation holes in the OSB ? I have rather drafty garagedoor now but i imagine maybe in the future doing an upgrade of that so it would be more insulated. As this garage is attached to the house, i wouldnt want to get moisture issues traveling to the house.

Edited by atv2 on Thursday 10th August 13:47

[atv2]

I have no idea really if my garage is damp. How would i know?
Probably a bit? It's a single brick wall, with bad grouting. Should i put some paper on the floor or walls and check in the morning?

Why is the plastic put between the OSB and the insulation, why not protect the insulation from the moisture as well?

If you added a damp proof course (that is the plastic that goes against the wall right?) i should probably as well. Was this permeable or impermeable?

The insulation would ultimately be held by the screws holding the OSB/ply in place correct?
Sorry for all the questions!

Edited by atv2 on Thursday 10th August 15:31

[atv2]

I guess i'm just slightly apprehensive about causing moisture issues in the rest of the house. I dont want the house to go down in value because of shoddy work by myself. Then again i can rip off the plywood or drill holes anytime.