Hi all,
I'm converting an attic room (roughly 4m square) which has only around 70mm depth joists, supported by large beams. Black bitumen type sarking felt. Two small velux windows currently fitted to work around.
I've fitted 7 round soffit vents at the front of the house, but there's no board at the back. There is also currently no ridge ventilation.
I've bought 4 plastic vented tiles (nearly £100!!) to get the extra ventilation.
So the idea is:
Any thoughts on the whole thing?
thanks
I'm converting an attic room (roughly 4m square) which has only around 70mm depth joists, supported by large beams. Black bitumen type sarking felt. Two small velux windows currently fitted to work around.
I've fitted 7 round soffit vents at the front of the house, but there's no board at the back. There is also currently no ridge ventilation.
I've bought 4 plastic vented tiles (nearly £100!!) to get the extra ventilation.
So the idea is:
- Fit 2 tiles near the top of the roof and 2 near the bottom at the back of the house.
- Box off the ends and the apex of the attic to enable airflow.
- 80mm(?) Kingspan / Celotex below the joists.
- Vapour layer (what type? not sure if needed or just tape the PIR board?)
- Plasterboard (foil backed?) with LONG screws (assuming no issues with stability upon the PIR board)
Any thoughts on the whole thing?
thanks
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