Converting a carport to a heated garage

[byggare_po]

Hello,

I'm considering converting a carport into a heated garage, with the following conditions:
- Gravel on the ground
- Heated house with brick facade on both sides (except at the back, which has uninsulated plank walls)
- On 2/3 of the short side, an insulated and heated storage room on a concrete slab. The rest is a plank wall.

My plan is now:
- Remove the gravel, dig out 55cm. Then 15cm of macadam, 30cm of cellular plastic, and a 10cm concrete slab.
- Insulate the roof. 19cm joist height, so air gap at the top and 17cm insulation, moisture barrier, and plasterboards.
- Walls against brick. HERE I NEED TIPS!!
- Wall against heated storage room. Only plasterboard??
- Plank walls. Wind protection, 12cm(?) insulation, moisture barrier, and plasterboards.

So I need tips for the brick walls, but otherwise, does the above seem like a reasonable plan??

Thanks in advance for constructive feedback.🙂

 

[ricebridge]

First and foremost, unfortunately, you probably need a building permit. Change of use and all that, you know. Check with the municipality, it can vary from place to place.

 

[byggare_po]

First and foremost, unfortunately, you probably need a building permit. Change of use and all that, you know. Check with the municipality, it may vary from place to place.

Sure... THAT is already underway but thanks anyway.🙂 What I mainly need are construction tips on how to handle the brick walls.

 

[Odi et Amo]

Jojo... THAT is already underway but otherwise thanks.🙂 What I mainly need are construction tips on how to handle the brick walls.

leave them alone?
Of course, it depends on what you want to achieve. You can plaster and paint them if you want them white.

 

[byggare_po]

let them be?
Of course, it depends on what you want to achieve. You can polish and paint them if you want them white.

I have no problem with the appearance, I'm more concerned about heat being conducted to the outside via the brick... If you put up studs and insulate in front of the brick, this should be avoided but must there be air gaps and if so, how should these be designed?

 

[Odi et Amo]

Isn't it outer walls on two houses?

 

[Jonatan79]

You are planning a warm garage, not a passive house, don't overthink regarding insulation in the side walls. You could, for example, spray polyurethane on the ceiling without an air gap.

 

[ricebridge]

The word "warm" in "varmgarage" is quite a flexible term. It's rarely as warm and cozy in there as in the living room, even if you spend a lot of time working on things.

I think you can leave the brick wall as it is to start with. If you notice that it seems to cool down the garage, then you can consider adding extra insulation afterward. But I don't think that will be necessary. It will behave like an interior wall, and you don't need to insulate those. Additionally, it is already insulated.

 

[Bowser]

If the brick wall is a cavity wall, cold air will enter behind the wall into the garage. This can lead to condensation and considerable cooling on the inside.
At least that's what I'm thinking.

 

[ricebridge]

If the brick wall is a shell wall, then cold air will come in behind the wall into the garage. That could indeed cause condensation and significant cooling on the inside.
Those are my thoughts anyway.

But that cold air has to come from somewhere as well.

 

[Bowser]

Yes... outside when it's cold?