wadi1982
2012-07-08 15:48:40
- #1
Hello.
We want to waterproof our precast concrete basement of the new building.
According to the soil report, installing a drainage system is sufficient for waterproofing against ground moisture / non-accumulating seepage water.
Our plan is as follows:
- Grind the basement, break the edge of the floor slab and sweep off
- Brush the joint between the floor slab / walls with sealing slurry and immediately create a fillet of cement mortar "fresh in fresh."
- When the fillet is dry, prime with a bitumen primer and let dry.
We want to build the actual waterproofing in 2 layers of single-component liquid waterproofing membrane (1-K KMB) with reinforcement fleece in between.
And until yesterday, (I thought) everything was clear to me.
The manufacturer of the waterproofing membrane prescribes a wet layer thickness of 3.7 mm. So let's simply assume 4 mm.
So apply 2 mm and press the fleece into the still fresh layer.
Let it set and apply another 2 mm on top -> 4 mm wet layer thickness.
Now yesterday I came across an article on the topic of KMB where it says that in our case a wet layer thickness of 4 mm per layer is required.
How should this now be understood? Do we really have to apply 2 x 4 mm if we do 2 layers with fleece in between? Just from a feeling, that's (after all 8 mm) quite thick, isn't it?
How thick should the total structure of the KMB be now?
For the sake of completeness: After the KMB has dried, 100mm Styrofoam boards will be glued on with a two-component KMB. After that, the 4 light shafts will be installed and then a studded membrane as backfill protection.
Thanks in advance
We want to waterproof our precast concrete basement of the new building.
According to the soil report, installing a drainage system is sufficient for waterproofing against ground moisture / non-accumulating seepage water.
Our plan is as follows:
- Grind the basement, break the edge of the floor slab and sweep off
- Brush the joint between the floor slab / walls with sealing slurry and immediately create a fillet of cement mortar "fresh in fresh."
- When the fillet is dry, prime with a bitumen primer and let dry.
We want to build the actual waterproofing in 2 layers of single-component liquid waterproofing membrane (1-K KMB) with reinforcement fleece in between.
And until yesterday, (I thought) everything was clear to me.
The manufacturer of the waterproofing membrane prescribes a wet layer thickness of 3.7 mm. So let's simply assume 4 mm.
So apply 2 mm and press the fleece into the still fresh layer.
Let it set and apply another 2 mm on top -> 4 mm wet layer thickness.
Now yesterday I came across an article on the topic of KMB where it says that in our case a wet layer thickness of 4 mm per layer is required.
How should this now be understood? Do we really have to apply 2 x 4 mm if we do 2 layers with fleece in between? Just from a feeling, that's (after all 8 mm) quite thick, isn't it?
How thick should the total structure of the KMB be now?
For the sake of completeness: After the KMB has dried, 100mm Styrofoam boards will be glued on with a two-component KMB. After that, the 4 light shafts will be installed and then a studded membrane as backfill protection.
Thanks in advance