Hello!
I am planning to create a winter-adapted conservatory with a poured concrete slab and underfloor heating.
The house we live in has a crawl space, which means that the bottom edge of the brick facade is about 25cm below the finished floor level.
The question is, we would prefer not to have stairs down to the conservatory and wonder if it is technically possible to pour the slab up to the finished floor level?
This would mean that the slab will be poured up 25cm on the brick.
I hope you understand what I mean and can answer my question.
I am planning to create a winter-adapted conservatory with a poured concrete slab and underfloor heating.
The house we live in has a crawl space, which means that the bottom edge of the brick facade is about 25cm below the finished floor level.
The question is, we would prefer not to have stairs down to the conservatory and wonder if it is technically possible to pour the slab up to the finished floor level?
This would mean that the slab will be poured up 25cm on the brick.
I hope you understand what I mean and can answer my question.
You should place an expansion joint between the brick and the concrete. This can be done with styrofoam or similar material.
That sounds positive.J justusandersson said:
There are ventilation holes in the first row of bricks that unfortunately get clogged with the poured concrete base.
And I'm also thinking about the sill inside that ends up under the concrete base.
Does that affect anything?
If the brick façade will still be partially outside, the air gap behind the brick should be open. The easiest solution is probably to create new ventilation holes in the corresponding head joints above the concrete slab. What is the sill under the brick made of? Isn't it constructed of concrete blocks/leca blocks?
Partially, it will be where the conservatory ends in width.J justusandersson said:
I'm also wondering how on earth to make it look nice on the side where the concrete footing lies above the brick facade.
Under the brick, there are built-up leca blocks, but inside them, there’s a 45x120 sill according to the construction drawings of the house.
It's that sill I mean would get enclosed if I pour the concrete footing on the brick?
It depends a bit on how the stud wall inside the facade brick is constructed. Can you post your construction drawing? Maybe you can place a brick on its side between the edge of the slab and the facade brick?
J justusandersson said:
This is how the construction drawing looks with a lot of details on the same drawing, but I think you understand where to look.
Could there be an advantage in the possibility that the sill won't be completely enclosed due to the crawl space?
Admittedly, there is plastic sheeting, but there is also plastic sheeting behind the brick facade, so my issue with an enclosed sill might not be a problem?
I can't open the drawing with enough resolution to read it. Try using the "Upload image/video" button at the bottom of the Byggahus reply box.
Oh, that function I was looking for but couldn't find last time.J justusandersson said:
Here it comes!
As you can also see on the detail drawing, it shows more precisely what I have been trying to describe in text. The floor chipboard inside the house is about 2.5 bricks above the bottom edge of the brick facade.
But the more I think about possible solutions, some ideas come up.
I could have built up with brick in a stair-step manner at the junction between my concrete slab and the existing brick facade, which I think could have looked like a nice solution.
However, the problem remains how and if I can cast up the rest of the footing against the brick facade.
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After looking at your drawing, I think the only thing you need to do (in addition to the advice I have given earlier) is to create new air holes in the butt joints above the plate. The easiest way is probably to drill using a carbide drill. You are right to consider this. It's important that it looks neat.