HalloClarissa
2023-01-31 12:26:13
- #1
Now my structural engineer (also responsible for the energy certificate) and the basement builder do not agree.
The basement builder says: "Since the heating is in the basement, the basement must also comply with the Building Energy Act" (basement on a slope is planned with 25 cm concrete wall and 10 cm XPS insulation on the exterior wall and under the floor slab, but unheated).
The structural engineer says: "It is sufficient that the energy certificate shows that heating and hot water are not within the thermal envelope of the house, but in the unheated basement - important would be the transition from the timber frame wall to the basement ceiling and basement wall, if this is structurally insulated, because the wall or base plate cannot rest on the exterior insulation of the basement wall. There is a detail from the home builder about this."
Background:
Bungalow in timber frame construction with wooden facade (total 25.5 cm thick) stands on a prefabricated basement. The basement is on a 22% slope, so that one side is completely underground and the other side completely above ground. The U-value of the basement walls will therefore be about 0.35. We will insulate the basement ceiling with our own work. If we later convert a room to a guest room, we will additionally insulate it from the inside.
WHO is right?
I hope someone in the forum is familiar with the Building Energy Act. Many thanks.
The basement builder says: "Since the heating is in the basement, the basement must also comply with the Building Energy Act" (basement on a slope is planned with 25 cm concrete wall and 10 cm XPS insulation on the exterior wall and under the floor slab, but unheated).
The structural engineer says: "It is sufficient that the energy certificate shows that heating and hot water are not within the thermal envelope of the house, but in the unheated basement - important would be the transition from the timber frame wall to the basement ceiling and basement wall, if this is structurally insulated, because the wall or base plate cannot rest on the exterior insulation of the basement wall. There is a detail from the home builder about this."
Background:
Bungalow in timber frame construction with wooden facade (total 25.5 cm thick) stands on a prefabricated basement. The basement is on a 22% slope, so that one side is completely underground and the other side completely above ground. The U-value of the basement walls will therefore be about 0.35. We will insulate the basement ceiling with our own work. If we later convert a room to a guest room, we will additionally insulate it from the inside.
WHO is right?
I hope someone in the forum is familiar with the Building Energy Act. Many thanks.