I'm looking at having a partial garage conversion done and have spoken to my local council regarding building regs. My understanding of building methods is quite limited so wondered if anyone could clarify if the requested construction makes sense.
One wall is an external facing single skin brick wall. For this wall the council have requested the following:
- A stud wall be built to provide a cavity from the brick wall.
- The stud wall should be built on top of the raised floor.
- It should have 100mm rigid insulation within the frame.
- It should have a breather membrane installed on the back of the stud frame (on the cold side in the cavity).
My main concern is whether there is a risk of moisture (from either inside or outside the building) causing problems within this cavity since the bottom of the cavity will be the floor boards of the raised floor.
1) Would it be a good idea to also install a vapour control layer on the warm side to prevent condensation within the cavity?
2) Should the breather membrane connect to the DPM in the floor?
3) Is there any way that water could form within the cavity? The cavity will have no ventilation and no where for water to run off, so is this an issue or is my understanding of how a cavity works wrong?
One wall is an external facing single skin brick wall. For this wall the council have requested the following:
- A stud wall be built to provide a cavity from the brick wall.
- The stud wall should be built on top of the raised floor.
- It should have 100mm rigid insulation within the frame.
- It should have a breather membrane installed on the back of the stud frame (on the cold side in the cavity).
My main concern is whether there is a risk of moisture (from either inside or outside the building) causing problems within this cavity since the bottom of the cavity will be the floor boards of the raised floor.
1) Would it be a good idea to also install a vapour control layer on the warm side to prevent condensation within the cavity?
2) Should the breather membrane connect to the DPM in the floor?
3) Is there any way that water could form within the cavity? The cavity will have no ventilation and no where for water to run off, so is this an issue or is my understanding of how a cavity works wrong?