Hi All,
I'm looking to do a partial garage conversion to add a laundry room to my house. The house is a late 80s Bovis (not sure if that's good or bad...) The house has a semi integral double garage (i.e. one side sits under the house, the other half under a pitched roof) Hopefully my 2D floor plan below explains this. Currently there is a firedoor between the garage and the hallway (All signed off by building control)
I want this to be compliant with building regs.
The room in turquoise is what I would like to create (2 new walls, 1 door and a raised floor)
Currently the garage slab is ~130mm below the finished floor level of the house, I would like the new laundry to be at the same level of the house. I have no idea how thick the slab is, nor whether it is insulated. I will say, it is dry in there.
I have a few questions which hopefully the experts here can give me a steer on before I start the conversation with building control:
1) As I want to raise the floor, what is the best way to do this? In my mind I need to build a small dwarf wall (2 courses) to bring it to the level of the house, then add a stud wall on top of this? I assume I can not simply go from the concrete slab with the stud wall as how would I create a new door threshold? Can I build a small dwarf wall direct onto the garage slab?
2) I assume I will need to add some kind of damp proof membrane and insulation on top of the floor slab, then add insulation and finally some screeding. Could I use timber joists instead with insulation between and floorboards? It would mean the joists would be very close to the existing concrete slab. The rest of the house is concrete floors.
3) I'm aware I need to comply with fire regs, which will mean the 2 new stud walls will need to be rated at 30 mins, and also the new door, I don't believe I would need to do anything with the existing internal walls?
4) What kind of thermal performance do I need from the stud walls, I'm not clear if they are classed as exterior walls as they are enclosed by the existing garage wall, if that makes any difference
Any guidance on this would be appreciated. I have deliberately not gone to the end of the house with the conversion to ensure I can still get a car in the left side and open the door without hitting the new laundry. Plumbing/drainage isn't an issue as the WC sink waste comes into the garage before returning back to the soil pipe in the bottom left corner of the WC.
I'm looking to do a partial garage conversion to add a laundry room to my house. The house is a late 80s Bovis (not sure if that's good or bad...) The house has a semi integral double garage (i.e. one side sits under the house, the other half under a pitched roof) Hopefully my 2D floor plan below explains this. Currently there is a firedoor between the garage and the hallway (All signed off by building control)
I want this to be compliant with building regs.
The room in turquoise is what I would like to create (2 new walls, 1 door and a raised floor)
Currently the garage slab is ~130mm below the finished floor level of the house, I would like the new laundry to be at the same level of the house. I have no idea how thick the slab is, nor whether it is insulated. I will say, it is dry in there.
I have a few questions which hopefully the experts here can give me a steer on before I start the conversation with building control:
1) As I want to raise the floor, what is the best way to do this? In my mind I need to build a small dwarf wall (2 courses) to bring it to the level of the house, then add a stud wall on top of this? I assume I can not simply go from the concrete slab with the stud wall as how would I create a new door threshold? Can I build a small dwarf wall direct onto the garage slab?
2) I assume I will need to add some kind of damp proof membrane and insulation on top of the floor slab, then add insulation and finally some screeding. Could I use timber joists instead with insulation between and floorboards? It would mean the joists would be very close to the existing concrete slab. The rest of the house is concrete floors.
3) I'm aware I need to comply with fire regs, which will mean the 2 new stud walls will need to be rated at 30 mins, and also the new door, I don't believe I would need to do anything with the existing internal walls?
4) What kind of thermal performance do I need from the stud walls, I'm not clear if they are classed as exterior walls as they are enclosed by the existing garage wall, if that makes any difference
Any guidance on this would be appreciated. I have deliberately not gone to the end of the house with the conversion to ensure I can still get a car in the left side and open the door without hitting the new laundry. Plumbing/drainage isn't an issue as the WC sink waste comes into the garage before returning back to the soil pipe in the bottom left corner of the WC.