Hi.
I have removed a part of the floor in the basement, about 20m2, to address a drainage issue. Now that I'm going to re-cast the hole, I'm easily confused as I get lots of good tips on how to do it and what type of concrete to use.
My plan is:
First, cover the ground (soil and rock) with a ground cloth and level it with gravel about 50mm. Sewage and drainage will also lie in this bed, followed by 100mm insulation, then reinforcement and some kind of concrete 100mm, thereafter self-leveling compound to make the entire basement even and nice. Over this, I will install a ventilated floor where exposed walls will also be clad with this system to mechanically ventilate out any moisture from the structure. There will be no underfloor heating as the slab largely lies directly on the ground. 1940s house.
If anyone has good thoughts and ideas regarding the type of concrete and drying times, I would be very happy. If anyone has experience from similar projects, I am very interested in hearing how you have done it.
The picture is taken before drainage, etc., is installed. So yes, it is wet!
Best regards,
Denny
I have removed a part of the floor in the basement, about 20m2, to address a drainage issue. Now that I'm going to re-cast the hole, I'm easily confused as I get lots of good tips on how to do it and what type of concrete to use.
My plan is:
First, cover the ground (soil and rock) with a ground cloth and level it with gravel about 50mm. Sewage and drainage will also lie in this bed, followed by 100mm insulation, then reinforcement and some kind of concrete 100mm, thereafter self-leveling compound to make the entire basement even and nice. Over this, I will install a ventilated floor where exposed walls will also be clad with this system to mechanically ventilate out any moisture from the structure. There will be no underfloor heating as the slab largely lies directly on the ground. 1940s house.
If anyone has good thoughts and ideas regarding the type of concrete and drying times, I would be very happy. If anyone has experience from similar projects, I am very interested in hearing how you have done it.
The picture is taken before drainage, etc., is installed. So yes, it is wet!
Best regards,
Denny
Not much advice on the quality of the concrete as I bought ready-mixed (concrete truck) since I had about 13 square meters and didn't think it was worth the effort to mix it myself. I bought the service from a company and there was a slope towards the drain and it was so smooth that I didn't need to use self-leveling compound afterwards.
They told me to count 1 week/cm so it was a 10-week wait for the floor before it could be continued there.
They told me to count 1 week/cm so it was a 10-week wait for the floor before it could be continued there.
The question is, as stated, whether you should mix yourself or get it from a concrete truck. But since you're going to lay a ventilated floor on top, you can go with coarse concrete or equivalent from the concrete station. Lay the guide rails carefully and use a level board when casting to get the right level directly, so you don't need to use self-leveling compound. Since you're not having any waterproofing layer, you don't need to consider any drying times. You can essentially continue with the next step the day after casting, but I'd still say that it might be wise to wait a week so you can keep the concrete moist as it cures.
I have installed both Jape's system for mechanically ventilated basement walls and also passively ventilated systems with internal insulation. Is there anything specific you're wondering about? I believe that @Jarlingar has some experience with ventilating floors, if nothing else.
I have installed both Jape's system for mechanically ventilated basement walls and also passively ventilated systems with internal insulation. Is there anything specific you're wondering about? I believe that @Jarlingar has some experience with ventilating floors, if nothing else.
When you need to ventilate both the wall and the floor, I recommend getting help from Isola. That way you'll get both a dimension drawing/execution and a list of materials. Place age-resistant plastic between the gravel and insulation. For reinforcement, I would use 6150 mesh and concrete equivalent to c32/40. You can advantageously pour 8 cm instead of 10.