Hi all,
First of all this forum is very useful, I've learnt many things off it and would like to say thanks!
Got a question regarding the design and construction of a warm deck flat dormer roof.
We had a loft extension, was supposed to be top spec, but the company has been utterly rubbish every step of the way in short! They didn't put insulation in the floors, they got the measurements completely wrong, velux windows weren't installed properly and we still have water leaks 9 months on! I've managed to get them to fix almost everything now, and we're just short of taking them to court.
But I notice that the room is incredibly cold during this last few weeks, despite the 'top spec' insulation.
As the standard of work has been so poor, I wouldn't be surprised if they've missed lots out, as they have done in other areas.
I have found that at the front of the dormer, facing away from the house, their is only a thin plastic facia covering the front (see pic with arrows), no sub fascia or anything. So as you can see from the photos I took from poking my phone through the recessed lighting holes, daylight is coming through thin fascia and into the gap between the joists. The fascia is quite loose so there is plenty (too much) ventilation!
In the one photo with the hose, that is the bathroom vent going straight out from the bathroom through the fascia, there is nothing else there at all! In the other photos it appears just the joist blocking is slightly in front of the fascia.
So any heat which goes up into the gap between the roof joists, is swiftly flushed out the front via the gappy fascia and the fact that it is incredibly thin, almost making the insulation above it useless!
Can anyone please tell me if this design is correct and normal? Or should there be some sub fascia or other bit there behind the fascia to stop so much heat escaping?
Many thanks for any help!
Andy
First of all this forum is very useful, I've learnt many things off it and would like to say thanks!
Got a question regarding the design and construction of a warm deck flat dormer roof.
We had a loft extension, was supposed to be top spec, but the company has been utterly rubbish every step of the way in short! They didn't put insulation in the floors, they got the measurements completely wrong, velux windows weren't installed properly and we still have water leaks 9 months on! I've managed to get them to fix almost everything now, and we're just short of taking them to court.
But I notice that the room is incredibly cold during this last few weeks, despite the 'top spec' insulation.
As the standard of work has been so poor, I wouldn't be surprised if they've missed lots out, as they have done in other areas.
I have found that at the front of the dormer, facing away from the house, their is only a thin plastic facia covering the front (see pic with arrows), no sub fascia or anything. So as you can see from the photos I took from poking my phone through the recessed lighting holes, daylight is coming through thin fascia and into the gap between the joists. The fascia is quite loose so there is plenty (too much) ventilation!
In the one photo with the hose, that is the bathroom vent going straight out from the bathroom through the fascia, there is nothing else there at all! In the other photos it appears just the joist blocking is slightly in front of the fascia.
So any heat which goes up into the gap between the roof joists, is swiftly flushed out the front via the gappy fascia and the fact that it is incredibly thin, almost making the insulation above it useless!
Can anyone please tell me if this design is correct and normal? Or should there be some sub fascia or other bit there behind the fascia to stop so much heat escaping?
Many thanks for any help!
Andy
