AnneS
2018-09-22 09:25:05
- #1
Hello,
I am new here and need some advice.
We have a timber frame prefab house from Allkauf Haus, built in 2003. 101 sqm ground floor with attic.
We would now like to extend. Preferably also on the ground floor and with a first floor. Below should be about 20 sqm (4x5.5m) plus attic.
An architect and a certified engineer have already advised us and presented two options. Both, however, without guarantee, because we do not have any structural calculations of our house and can’t get them (building records are empty regarding this due to construction under simplified procedure and Allkauf Haus supposedly no longer has anything, everything deleted). How do you get the old structural calculations? They must exist somewhere, since hundreds of houses are almost identical to ours. Or am I mistaken?
1st option: our house stays almost as it is. So that the statics are not greatly changed or affected. However, one rafter of the rafter roof would be removed so that a passage to the extension can be created there. Major disadvantage: a current room would remain with a sloping roof even though a new room is created right next to it. The new room would have a negative roof slope and would butt against our current roof. Possibly, this air space could be equipped with storage shelves for light items. So a room would have a sloping roof as it does now, although there is no longer anything outside there. Also, the area where the knee wall is now would somehow be unused and disappear into nothing. You don’t do things like that, right? No one has that, do they?
Advantage: house remains habitable during construction
2nd option: intermediate purlins would be retrofitted transversely in the attic area. These would also be supported across the house with columns down to the foundation in the ground floor. Possibly another purlin could also be installed in the lower part of the rafters behind the knee wall (is that the correct term?). Then the old rafter roof could be widely opened and extended.
Advantage: the extension and the room to which it is attached would have normal walls. No air space would appear in the middle of the house. More room volume. Fully usable.
Is something like this even possible?
Disadvantage: complicated, expensive, has anyone ever done this? House uninhabitable for 3 to 5 months
Difficult decision. Does anyone have a tip or has done one of these?
I am happy to answer any questions.
Regards, Anne
I am new here and need some advice.
We have a timber frame prefab house from Allkauf Haus, built in 2003. 101 sqm ground floor with attic.
We would now like to extend. Preferably also on the ground floor and with a first floor. Below should be about 20 sqm (4x5.5m) plus attic.
An architect and a certified engineer have already advised us and presented two options. Both, however, without guarantee, because we do not have any structural calculations of our house and can’t get them (building records are empty regarding this due to construction under simplified procedure and Allkauf Haus supposedly no longer has anything, everything deleted). How do you get the old structural calculations? They must exist somewhere, since hundreds of houses are almost identical to ours. Or am I mistaken?
1st option: our house stays almost as it is. So that the statics are not greatly changed or affected. However, one rafter of the rafter roof would be removed so that a passage to the extension can be created there. Major disadvantage: a current room would remain with a sloping roof even though a new room is created right next to it. The new room would have a negative roof slope and would butt against our current roof. Possibly, this air space could be equipped with storage shelves for light items. So a room would have a sloping roof as it does now, although there is no longer anything outside there. Also, the area where the knee wall is now would somehow be unused and disappear into nothing. You don’t do things like that, right? No one has that, do they?
Advantage: house remains habitable during construction
2nd option: intermediate purlins would be retrofitted transversely in the attic area. These would also be supported across the house with columns down to the foundation in the ground floor. Possibly another purlin could also be installed in the lower part of the rafters behind the knee wall (is that the correct term?). Then the old rafter roof could be widely opened and extended.
Advantage: the extension and the room to which it is attached would have normal walls. No air space would appear in the middle of the house. More room volume. Fully usable.
Is something like this even possible?
Disadvantage: complicated, expensive, has anyone ever done this? House uninhabitable for 3 to 5 months
Difficult decision. Does anyone have a tip or has done one of these?
I am happy to answer any questions.
Regards, Anne