ᐅ Insulating the exterior basement wall due to the 10,000 Houses Program

Created on: 1 Jan 2016 21:31
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Bau.Joe
We have submitted an application for a 1.5-liter house as part of the 10,000 Houses Program initiated by the Free State of Bavaria. To achieve this, we need a very high insulation value in the basement. This wouldn’t be a problem if we could simply add an unlimited amount of external insulation.

However, to ensure our house (timber frame construction) is properly supported on the basement, a maximum of 12 cm (5 inches) of insulation is possible. If we were to use 14 cm (6 inches), the basement wall would protrude.

My idea was to add 2 cm (1 inch) more insulation on the upper floors as well. But the builder says that 8 cm (3 inches) of wood fiber insulation is too heavy for the fasteners. His suggestion is to apply internal insulation in the basement. I’m not very enthusiastic about that.

Does anyone have an idea of other options? For example, basement insulation of 12 cm (5 inches) with a better insulation value?
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Sebastian79
1 Jan 2016 21:56
Okay, then clear. Thanks to you!
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Bau.Joe
3 Jan 2016 16:22
The question is still whether there is any exterior insulation for basements with a thermal conductivity (WLG) value of 0.32. Does anyone know of any?
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Sebastian79
3 Jan 2016 16:23
Oh yes: 2 seconds on Google would have helped you a long time ago 😉

Keywords: perimeter insulation 032
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Bau.Joe
3 Jan 2016 20:03
Sebastian79 schrieb:
Oh right: 2 seconds on Google would have helped you a long time ago 😉

Keywords: perimeter insulation 032

I have searched online as well. What I don’t understand is which types of insulation can be used underground and which are external insulation? Perimeter insulation is also the insulation installed beneath the slab, right? That’s why I asked here if anyone can say, “This is exactly the product you need.”
Ideally, I would have preferred my home builder to tell me the solution. But they just want to install internal insulation for 5,000 euros and be done with it.
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Sebastian79
3 Jan 2016 20:08
Perimeter insulation always refers to insulation against the ground.

Whether it may also be installed under the slab depends on the manufacturer's approvals regarding compressive strength.

Insulation labeled as perimeter insulation is generally allowed to be installed up to a depth of 3 meters (10 feet).
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Bau.Joe
3 Jan 2016 20:17
Sebastian79 schrieb:
Perimeter insulation always refers to insulation against the ground.

Whether it is allowed underneath the slab depends on the manufacturer's approvals regarding compressive strength.

Insulation designated as perimeter insulation can definitely be installed up to a depth of 3m (10 feet).

Thanks for the info. Now I probably need to discuss with the energy consultant what value is required so that we can avoid interior insulation.