Hi!
Yay, I got the building permit for my garage/storage approved today.
But I have to build it fireproof. It will be on the property line, so the wall towards the neighbor must be fire-rated, as stated in the papers.
Now I'm wondering if double drywall is enough?
I will frame the garage/storage with 145*45 studs.
/Lars
Yay, I got the building permit for my garage/storage approved today.
But I have to build it fireproof. It will be on the property line, so the wall towards the neighbor must be fire-rated, as stated in the papers.
Now I'm wondering if double drywall is enough?
I will frame the garage/storage with 145*45 studs.
/Lars
It depends on what class is required, EI with a number after...
Well, how do you know what's required? It says that "brandkass should be reported." And when they called, they said the wall to the neighbor should be stronger for fire safety purposes.
Guess I'll have to call and talk to them again.
/Lars
Guess I'll have to call and talk to them again.
/Lars
How far is it to the surrounding buildings?"
"The wall must be stronger for fire safety purposes"? Stronger than what? What have you documented for the design of the walls? Are you going to have an insulated garage?
The requirements I think you can manage with are probably Fire class BR 3, Fire resistance EI 30
Double plasterboards meet EI 30
If I understand fire resistance theories correctly.
I would recommend rock wool insulation between the studs, a wooden board behind a plasterboard so you have something to screw into
and a good surface to paint on. Then you meet EI 30.
Refer to the addition method so you don't have to think about double plasterboards alone.
With the addition method, the fire resistance is calculated by summing the individual elements of a construction.
"The wall must be stronger for fire safety purposes"? Stronger than what? What have you documented for the design of the walls? Are you going to have an insulated garage?
The requirements I think you can manage with are probably Fire class BR 3, Fire resistance EI 30
Double plasterboards meet EI 30
If I understand fire resistance theories correctly.
I would recommend rock wool insulation between the studs, a wooden board behind a plasterboard so you have something to screw into
and a good surface to paint on. Then you meet EI 30.Refer to the addition method so you don't have to think about double plasterboards alone.
With the addition method, the fire resistance is calculated by summing the individual elements of a construction.
The garage is a cold garage.
The wall will be constructed like this:
surface cladding
wind barrier
framing 45*145
glass wool insulation
plywood board
double plasterboard
To the neighbor's house, it's probably about 10 meters, but their glazed porch is wall-to-wall.
/Lars
The wall will be constructed like this:
surface cladding
wind barrier
framing 45*145
glass wool insulation
plywood board
double plasterboard
To the neighbor's house, it's probably about 10 meters, but their glazed porch is wall-to-wall.
/Lars
There is a difference between fire-retardant and fireproof.
Fire-retardant means that the wall can withstand an internally developed fire for a certain number of minutes. Then, the fire spreads to wooden studs and wooden facades and neighboring houses 'wall to wall' when the gypsum has carbonated under the heat and crumbles into white powder (as 'white' as it can be with the coloring of dirty smoke). 2 layers of gypsum are part of that type of fire protection.
If it is to be a fireproof construction, one has to search for a long time to find someone that meets that, because there is none. However, incombustible construction. Closest to that is stone.
If the neighbor's conservatory is 'wall to wall' with your common property line where your garage is also supposed to be wall to wall with the neighbor's glass-enclosed conservatory, you (or the owner for you) should have given your written permission for this placement and you yourself should also have received it from the neighbor. The neighbor should then also have the requirement to build fireproof at the property line.
A wooden facade in the property line is therefore less suitable. There should be stone material in the wall to be able to prevent the spread of fire to the neighbor. And that wall should, in that case, be up over the roof, otherwise, it is of no use because the flames can leap over from roof to roof with the help of the wind.
Therefore, you should probably request a clarification of what they mean in the building permit before you start and then have to redo it.
Fire-retardant means that the wall can withstand an internally developed fire for a certain number of minutes. Then, the fire spreads to wooden studs and wooden facades and neighboring houses 'wall to wall' when the gypsum has carbonated under the heat and crumbles into white powder (as 'white' as it can be with the coloring of dirty smoke). 2 layers of gypsum are part of that type of fire protection.
If it is to be a fireproof construction, one has to search for a long time to find someone that meets that, because there is none. However, incombustible construction. Closest to that is stone.
If the neighbor's conservatory is 'wall to wall' with your common property line where your garage is also supposed to be wall to wall with the neighbor's glass-enclosed conservatory, you (or the owner for you) should have given your written permission for this placement and you yourself should also have received it from the neighbor. The neighbor should then also have the requirement to build fireproof at the property line.
A wooden facade in the property line is therefore less suitable. There should be stone material in the wall to be able to prevent the spread of fire to the neighbor. And that wall should, in that case, be up over the roof, otherwise, it is of no use because the flames can leap over from roof to roof with the help of the wind.
Therefore, you should probably request a clarification of what they mean in the building permit before you start and then have to redo it.
Thank you for the response. I will go ahead and call them.
/Lars
/Lars
You are welcome to let us know how it goes in the future.
Hello!
Got the answer now regarding the firewall with the neighbor.
"When it comes to a fire-rated wall with the neighbor:
Stud wall insulated with min.wool, 13 gypsum on both sides (outdoor gypsum)."
So it's just a matter of starting to build then
/Lars
Got the answer now regarding the firewall with the neighbor.
"When it comes to a fire-rated wall with the neighbor:
Stud wall insulated with min.wool, 13 gypsum on both sides (outdoor gypsum)."
So it's just a matter of starting to build then
/Lars
Aha! So no double gypsum is needed? I'm also working on a garage, attached to the house. I have nothing in my papers about fire safety, etc. Do I need to consider double gypsum, or can I just ignore it? I'm also using external gypsum. But it's only 9.5mm. Also pondering over the garage's inner ceiling. Does it need to be double gypsum too? As mentioned, I have an upper floor. Then I have my residential house built together with the garage. Does that wall need to be double gypsum?kongolasse said:Hello! Got the answer now regarding the firewall against the neighbor. "For a fire-rated wall against the neighbor: Stud wall insulated with min.wool, 13 gypsum on both sides (external gypsum)." So then it's just a matter of starting to build