danielh
2012-10-17 07:53:32
- #1
Hello everyone,
I would like to get your expert opinion on the topic of basement waterproofing. We have two offers from different construction companies and I would like to hear your assessment of which basement waterproofing method against pressing water is the better option:
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1. Provider
Formwork of the basement, poured on site with 24 CM WU concrete, with 10 cm XPS insulation on top. According to the construction description, execution as "Weisse Wanne":
As a foundation, a floor slab at least 25 cm thick made of watertight reinforced concrete is constructed. Under the floor slab, a concrete leveling layer (d=5cm) with a sliding layer of 2 layers of PE foil above is carried out. The basement exterior walls are also formed and concreted on site with watertight reinforced concrete in a thickness of approx. 24 cm (not exposed concrete). The design is based on structural requirements assuming a soil pressure of at least 200 KN/m2, as well as soil moisture and occasional rising seepage water. The special bond of concrete and steel reinforcement achieves high crack resistance, which is of great importance for the high durability and long-term use of the basement. By constructing the basement as a "White Tub," no drainage is required. Additional costs, as usually necessary, for a soak pit including a submersible pump... are omitted... The basement walls are provided with a 10 cm thick, moisture-resistant XPS insulation on the outside, from the top edge of the floor slab up to the connection to the base plate thermal shell.
Regarding the basement floor it further states: All basement rooms receive a moisture barrier according to DIN 18195.
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2. Provider
Supply of sandwich elements, poured on site with WU concrete, thickness 30 cm
Unfortunately, I have no more detailed information here, since the construction description is outdated and I do not yet have a new one containing the exact basement construction. According to the advisor, who is also a master bricklayer, his construction would be just as secure as that of the other builder.
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What do you think about this?
I would like to get your expert opinion on the topic of basement waterproofing. We have two offers from different construction companies and I would like to hear your assessment of which basement waterproofing method against pressing water is the better option:
----------------------------------------------
1. Provider
Formwork of the basement, poured on site with 24 CM WU concrete, with 10 cm XPS insulation on top. According to the construction description, execution as "Weisse Wanne":
As a foundation, a floor slab at least 25 cm thick made of watertight reinforced concrete is constructed. Under the floor slab, a concrete leveling layer (d=5cm) with a sliding layer of 2 layers of PE foil above is carried out. The basement exterior walls are also formed and concreted on site with watertight reinforced concrete in a thickness of approx. 24 cm (not exposed concrete). The design is based on structural requirements assuming a soil pressure of at least 200 KN/m2, as well as soil moisture and occasional rising seepage water. The special bond of concrete and steel reinforcement achieves high crack resistance, which is of great importance for the high durability and long-term use of the basement. By constructing the basement as a "White Tub," no drainage is required. Additional costs, as usually necessary, for a soak pit including a submersible pump... are omitted... The basement walls are provided with a 10 cm thick, moisture-resistant XPS insulation on the outside, from the top edge of the floor slab up to the connection to the base plate thermal shell.
Regarding the basement floor it further states: All basement rooms receive a moisture barrier according to DIN 18195.
----------------------------------------------
2. Provider
Supply of sandwich elements, poured on site with WU concrete, thickness 30 cm
Unfortunately, I have no more detailed information here, since the construction description is outdated and I do not yet have a new one containing the exact basement construction. According to the advisor, who is also a master bricklayer, his construction would be just as secure as that of the other builder.
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What do you think about this?