Hello 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.
Duke Nukem schrieb:
I was, of course, referring to the internal structure of the building envelope. I wanted to ask what the difference is between the KfW-70 envelope and the Energy Saving Ordinance.
I don’t want to build to the KfW standard. Can I suggest an Energy Saving Ordinance envelope to the site manager and save money that way, or is the small difference not really worthwhile? It’s naturally great to save money, but when the difference is small, I don’t want to start cutting corners in the wrong places!The difference between the Energy Saving Ordinance and KfW-70 is no longer significant. I wouldn’t interfere too much with the construction manager if they already have a working concept. Hopefully, that leads to fewer mistakes, faster progress, and so on.
S
Sebastian7930 Mar 2016 10:33SirSydom schrieb:
However, to get an electrical connection installed by the utility company, they require a confirmation from the electrician that a foundation earth electrode according to DIN 18014 is present. Without this confirmation, no electrical connectionThis is also not (entirely) accurate – we did not have to provide this proof. So, this is handled quite differently depending on the region...
D
Duke Nukem30 Mar 2016 23:38Thanks first of all for all the detailed answers!
You don’t build a house every day, so there will definitely be more questions to come!
You don’t build a house every day, so there will definitely be more questions to come!