Hi
Looking for some advice. There seems to be 2 schools of though concerning ventilation on a low pitch roof for my extension. The room adjoins the kitchen area (semi open plan)
The roof is 15.8% and standard cold roof construction. No joists with rafters spanning 3.7m at less than 400 centres (building control ok'ed) and one velux. I will be using a marley fibre cement rated for the pitch. For clarity- this is a vaulted ceiling will 100mm celotex, airgap + 25mm + foil backed board
Ref ventilation: I am told that if you minimize air gaps as much as possible with insulation etc then there is no need to ventilate the roof. The alternative is to use eaves vent kit with a wall abutment vent kit (low profile).
The vents do not particularly cost a lot or really add a lot of time for fitting but I am keen to get it done the in the right way that does not come back to haunt you with problems.
Thoughts welcome
RB
Looking for some advice. There seems to be 2 schools of though concerning ventilation on a low pitch roof for my extension. The room adjoins the kitchen area (semi open plan)
The roof is 15.8% and standard cold roof construction. No joists with rafters spanning 3.7m at less than 400 centres (building control ok'ed) and one velux. I will be using a marley fibre cement rated for the pitch. For clarity- this is a vaulted ceiling will 100mm celotex, airgap + 25mm + foil backed board
Ref ventilation: I am told that if you minimize air gaps as much as possible with insulation etc then there is no need to ventilate the roof. The alternative is to use eaves vent kit with a wall abutment vent kit (low profile).
The vents do not particularly cost a lot or really add a lot of time for fitting but I am keen to get it done the in the right way that does not come back to haunt you with problems.
Thoughts welcome
RB