How to fix the hole in the best way? (Pictures)

[Mjärn]

There has been an air heat pump here before and it has been moved up, so now there is a hole here. How should I seal the hole in the best way? Foam sealant? Putty? Wood?

 

[klaskarlsson]

There was a heat pump here before and it has been moved up, so there's now a hole here. How should I best seal the hole? Foam sealant? Putty? Wood?

I would say use the same material as much as possible:
That is, insulate with wool in the hole and seal the surface with wood/gypsum.
You can saw a plug in the same dimension as the hole, screw a cross-brace behind the existing board (which is then of course a couple of cm longer on each side, so you have something to attach it to), and then the plug on that - putty, paint - done


Example with larger hole

 

[Mjärn]

Use the same material as much as possible, I would say:
That is, insulate with wool in the hole and cover the surface with wood/gypsum.
You can cut a plug in the same dimension as the hole, screw a cross brace behind the existing board (which is then a few cm longer on each side, of course, so you have something to attach it to), and then the plug onto it - spackle, paint - done

[image]
Example with a larger hole

At the deepest part of the hole, you can see the brick on the outside. Should I put something at the back there?

I would prefer to avoid making the hole larger. The hole is small enough that it probably doesn't need braces. So...

Is it enough to push in insulation, or do I need something by the brick? Then insulation. Then put some wooden board (which material?) at the inner wall?

 

[Tompafix]

At the deepest part of the hole, you can see the brick on the outside. Should I put something in there?

I would like to avoid making the hole larger. The hole is small enough that there probably don't need to be any studs. So...

Is it enough to poke in insulation or do I need something by the brick? Then insulation. Then place some kind of wooden board (what material?) at the interior wall?

As @klaskarlsson wrote above. Try to have the same material as before in each section. If they made a hole in the brick, then brick it up again. If there is an air gap between the brick and the insulation now, it should still be there now. It looks like fiberglass insulation. Difficult to say from the pictures what kind of wood board it is, chipboard or tretex it looks like. Is there a vapor barrier? It looks like it in the picture, then it should be repaired with tape for the purpose.
You don't need to make a larger hole to repair the hole. Take a hole saw and drill out an equally sized circular piece that you place in the hole in the same way the video shows.

 

[Mjärn]

As @klaskarlsson wrote above. Try to have the same material as before in each layer. If they made a hole in the brick, then patch it up with brick. If there is an air gap between the brick and the insulation now, it should be there now as well. It looks like fiberglass insulation. It's hard to say from the pictures what kind of wood board it is, looks like chipboard or tretex. Is there a vapor barrier? It seems like it from the picture, then it should be repaired with tape for that purpose.
You don't need to make a larger hole to patch the hole. Use a hole saw and drill out a circular piece of the same size that you place in the hole the same way the video shows.

Honestly, I don't know if there is an air gap. What is a vapor barrier? I've never owned a house before, so I'm totally clueless about this stuff. But I guess I'll have to Google around. It's hard to get a round wooden piece that's the same size as the hole all the way to the brick.

 

[Tompafix]

I mean, I don't know if there's an air gap. What is a vapor barrier? I've never owned a house before so I'm totally clueless about this stuff. But I guess I'll google around. It's hard to get a round wooden disc that's the same size as the hole all the way to the brick.

Vapor barrier, I think there's a plastic layer inside the wooden disc. If you try to look into the hole to see if the insulation goes all the way to the brick or if it stops a few cm before. You should just insert a round wooden disc where you have the wooden disc now. Not all the way out. So from inside and out, round wooden disc in the hole if you have a hole saw, otherwise saw a square disc and trace its contours on the wall and cut a hole the same size as the disc. Repair the plastic in the hole with age-resistant tape. Insulation as thick as it is there today, potential air gap, and lastly brick or mortar. You first need to put in insulation, then repair the plastic before repairing the wooden disc. And then repair the brick on the outside.

 

[Mjärn]

Vapor barrier, I think there's a plastic film behind the wood panel. Try to look into the hole to see if the insulation goes all the way to the brick or if it stops a few cm before.
You should just insert a round wood panel where you currently have the wood panel. Not all the way out. So from inside and out, a round wood panel in the hole if you have a hole saw; otherwise, cut a square panel and trace its contours on the wall and cut an equally sized hole as the panel. Repair the plastic in the hole with age-resistant tape. Insulation as thick as it is there today, potential air gap, and finally brick or mortar.
First, you need to lay in insulation, then repair the plastic, and then fix the wood panel. And then repair the brick on the outside.

The brick on the outside is still there.

 

[Tompafix]

The brick on the outside remains

Oh, how could they get through the wall then?

 

[Mjärn]

You should only insert a round wood disc where you have the wood disc now. Not all the way out.

What do you mean by this? So, I shouldn't have any wood disc at the very innermost part by the brick?

 

[Mjärn]

Well, how could they get it through the wall then?

Yes, now I see. The craftsman said I can spray a little foam sealer. It's not a huge hole in the brick.

Is that wrong?

 

[Tompafix]

What do you mean by this? So, I shouldn't have a wooden board the furthest in against the brick?

If there's a wooden board there now, the answer is yes. Not a very large space to work in though 😆
One way to solve it is to first make a larger hole on the inside. Remove some insulation. Fix the hole closest to the brick. Refill with insulation and repair the plastic, then place a new board furthest in towards the room.

 

[Tompafix]

Yes, now I see. The handyman said I can spray in some foam sealant. It's not a big hole in the brick.

Is that wrong?

I would have used mortar in the brick if it's small.

 

[Mjärn]

I would have used mortar in the brick if it's small.

I don't have the energy to stand and mix for such a small hole.

 

[Mjärn]

If there is a wooden board there now, the answer is yes. Not a very large space to work in though 😆
One way to solve it is to first make a larger hole on the inside. Remove some insulation. Repair the hole closest to the brick. Refill with insulation and fix the plastic, then place a new board on the inside facing the room.

How precise does this need to be? If I seal the facade from the outside with foam sealant and then put insulation in the hole and finish with wood on the inside?

 

[TH885]