Plasterboarding single skin detached garage

[dsme94]

Hi,

I'm due to get the keys to a property next week which has a detached garage. I intend to use the garage to store my Mclaren 570s, and would like to plasterboard the walls to make it a nice place to be rather than have the exposed breezeblock.

Let's start of with a picture of what's here already:





Method of madness:

2x1 inch treated timber battens screwed to the breezeblock with screws ( https://www.wickes.co.uk/Wickes-Treated-Sawn-Timbe...)
Pl
Knauf moisture resistance plasterboard on top ( https://www.wickes.co.uk/Knauf-Moisture-Panel-Tape...)

No insulation in between.

Will this be adequate to prevent any mold and dampness? I didn't have any intentions to insulate, but happy to be convinced otherwise as the garage is quite a good space.

Will be using a diesel-fueled space heater to take the nip away when doing little DIY jobs in there.

[dsme94]

Mr Squarekins said:

How about Tyvek vapour barrier behind the plaster board? Reduced chance of moisture, no real downside.

Will do, belts and braces wont hurt!

wolfracesonic said:

Use 18mm ply instead? Far better able to stand up to the rigours of garage life than plasterboard, makes hanging things from the walls far easier, cover the joints with stripwood for a ‘panelled look. More spendy than plasterboard but not if you’re having the latter skimmed by a plasterer.

I don’t like the finish of plywood, would rather plasterboard it.

KTMsm said:

Is the outside rendered ?

I presume you're having it skimmed as well?

If yes to both then I'd dab the boards on and I can't see why you would need moisture resistant unless it's a particularly exposed location

Yes, it’s rendered, roughcast (pebbledash?)

If rendered, does this mean we don’t need moisture resistant plasterboard? That will save a considerable chunk! I wont be plastering inside, only filling the screw holes and joints then painting straight onto the plasterboard with some form of washable emulsion.

Frankychops said:

is that a metal door? if so, stick stuff on the inside of that. that's like a reverse radiator.

I'd just paint the wallls and board the cealing, putting insulation where its missing.

It is a metal door, it’s also to be replaced for an electric roller door from Hormann once the opening has been widened.

I definitely want a nice smooth finish inside so will definitely be plasterboarding the walls. Te ceiling will be plasterboarded as well with blown wool put in between the ceiling joists.

[dsme94]

Panamax said:

This sounds nuts to me - garages need ventilation.

Is there heating in the garage? If not, what's the point of insulation? It'll just make the lack of ventilation problem worse.

Well this is why I asked…

The insulation is already in the roof as pictured, I was not intending to add anymore.

There is no heating in the garage, the only heating I will be having is the space heater as per the original post.

[dsme94]

Equus said:

No, that's a fair question: photo shows insulation between the joists and a chipboard deck, which since there'e no air gap above the insulation hopefully means that there's a room above, and the insulation is there to prevent loss of heat downwards?

It's a flat roof, unfortunately, nothing above!

Edited by dsme94 on Monday 22 January 11:17

[dsme94]

wilksy61 said:

This is basically what I did with my garage, DPM on the battens and one on the floor, then insulate (I do have heating and dehumidify), plasterboard and plaster.

What I also did was write on the plasterboard all the dimensions to the stud work and take pictures before it was plastered so I could mount things into solid wood.

What heating system and dehumidifier did you opt for?

[dsme94]

Well, FINALLY got the keys to this property…..

McLaren is in the garage, garage door is hella snug… tbc

Flat out with the flat renovation so I can get stuck into the garage! Will update this post with more details soon.