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Duke Nukem29 Mar 2016 22:37Hello everyone,
Today we received the building specification for our cost estimate.
The house we are building will not be a KFW house, only built to the Energy Saving Regulation standard!
Now I stumbled over the sentence below regarding the thermal envelope and wanted to ask what exactly this means?
How is this envelope composed? Is it necessary to build such an envelope? Is there another "Energy Saving Regulation envelope"?
Thanks in advance!
Excerpt from the text:
D: Shell construction work
Wall and ceiling thicknesses, material selection, steel reinforcements, concrete grades, and mortar classes will be executed according to the thermal insulation calculation and insulation requirements, structural demands, and currently valid technical standards.
The thermal envelope will be constructed as an Energy Efficiency House KFW 70 (status 2014).
d) Concrete and reinforced concrete work
The foundation consists of an in-situ concrete slab made of waterproof concrete on a gravel filter layer. The exterior basement walls will be built as single-shell Poroton walls, thickness 36.5cm (14.4 inches) T9. Floor slabs are precast solid slabs with cast-in-place topping, designed according to structural, acoustic, and thermal requirements. A stainless steel foundation earth electrode with appropriate connection points will be installed beneath the slab.
The floor slab will be insulated externally with perimeter insulation WLG 035, thickness 10cm (4 inches).
e) Masonry work
The exterior walls will be made as single-shell Poroton walls, 36.5cm (14.4 inches) thick, built according to the energy calculation. Interior partition walls will be constructed with hollow bricks. External roller shutters will be installed above the window openings integrated into the outer wall. The chimney will be built according to heating output and heating technology, with a chimney head cover above the roof (sheet metal or fiber cement). Additionally, a separate chimney is provided for a future wood stove installation on the ground floor.
f) Insulation work
The exterior basement walls will be coated with cement mortar and a thick protective coating with drainage panels and filter fleece will be applied. Drainage pipes with appropriate flushing and inspection shafts.
Today we received the building specification for our cost estimate.
The house we are building will not be a KFW house, only built to the Energy Saving Regulation standard!
Now I stumbled over the sentence below regarding the thermal envelope and wanted to ask what exactly this means?
How is this envelope composed? Is it necessary to build such an envelope? Is there another "Energy Saving Regulation envelope"?
Thanks in advance!
Excerpt from the text:
D: Shell construction work
- General
Wall and ceiling thicknesses, material selection, steel reinforcements, concrete grades, and mortar classes will be executed according to the thermal insulation calculation and insulation requirements, structural demands, and currently valid technical standards.
The thermal envelope will be constructed as an Energy Efficiency House KFW 70 (status 2014).
d) Concrete and reinforced concrete work
The foundation consists of an in-situ concrete slab made of waterproof concrete on a gravel filter layer. The exterior basement walls will be built as single-shell Poroton walls, thickness 36.5cm (14.4 inches) T9. Floor slabs are precast solid slabs with cast-in-place topping, designed according to structural, acoustic, and thermal requirements. A stainless steel foundation earth electrode with appropriate connection points will be installed beneath the slab.
The floor slab will be insulated externally with perimeter insulation WLG 035, thickness 10cm (4 inches).
e) Masonry work
The exterior walls will be made as single-shell Poroton walls, 36.5cm (14.4 inches) thick, built according to the energy calculation. Interior partition walls will be constructed with hollow bricks. External roller shutters will be installed above the window openings integrated into the outer wall. The chimney will be built according to heating output and heating technology, with a chimney head cover above the roof (sheet metal or fiber cement). Additionally, a separate chimney is provided for a future wood stove installation on the ground floor.
f) Insulation work
The exterior basement walls will be coated with cement mortar and a thick protective coating with drainage panels and filter fleece will be applied. Drainage pipes with appropriate flushing and inspection shafts.
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nordanney29 Mar 2016 22:42The shell is your house!!!
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Duke Nukem29 Mar 2016 23:00That is clear to me!
My questions were actually about something completely different!
My questions were actually about something completely different!
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nordanney29 Mar 2016 23:36Then you should ask yourself what you actually want to know.
There are countless ways to build according to a specific energy saving ordinance standard – whether your construction company does it is another question... (monolithic, external thermal insulation composite system, facing brick, timber frame construction, etc.).
There are countless ways to build according to a specific energy saving ordinance standard – whether your construction company does it is another question... (monolithic, external thermal insulation composite system, facing brick, timber frame construction, etc.).
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Bauexperte29 Mar 2016 23:52Duke Nukem schrieb:
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I came across the phrase below regarding the thermal envelope and wanted to ask what exactly it means?That your house will be built monolithically—without external thermal insulation composite system (ETICS or ETICS/EIFS)—and slightly better than the current energy saving regulation. Oh, and that it will be equipped under the building permit/planning permission with a foundation grounding system, which is normally only required for specific sealing methods—commonly referred to as a “white tank” (waterproof concrete structure).The only thing that confuses me is that the basement is planned to be masonry-built.
All in all, not the worst construction method. If the rest of the contract and specifications are in order, you have obviously made a reasonable choice.
Regards, Bauexperte
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Duke Nukem30 Mar 2016 08:33Good morning!
My questions were probably not very clearly defined, sorry!
I meant the internal structure of the building envelope, of course. I wanted to ask, what is the difference between the KfW 70 envelope and the requirements of the energy saving regulation (EnEV).
I do not want to build according to the KfW standard. Can I suggest an energy saving regulation envelope to the site manager and thereby save money, or is the small difference not really worth it? Of course, it’s nice to save money, but if the difference is small, I don’t want to start off on the wrong foot!
Why is a masonry basement unusual? Should I inquire about a different method?
What is the purpose of the stainless steel foundation earth electrode, and do I really need it?
My questions were probably not very clearly defined, sorry!
I meant the internal structure of the building envelope, of course. I wanted to ask, what is the difference between the KfW 70 envelope and the requirements of the energy saving regulation (EnEV).
I do not want to build according to the KfW standard. Can I suggest an energy saving regulation envelope to the site manager and thereby save money, or is the small difference not really worth it? Of course, it’s nice to save money, but if the difference is small, I don’t want to start off on the wrong foot!
Why is a masonry basement unusual? Should I inquire about a different method?
What is the purpose of the stainless steel foundation earth electrode, and do I really need it?
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