Looking for a bit of advice here but despite quite a bit of googling haven't managed to find anything that helps.
As part of a house refurbishment a glass roof was fitted - not the sort of massive affair you'd see on Grand Designs but a smaller unit about 3m x 1.8m.
Since installation, water has pooled in the unit whenever it rains - which being glass has a slight concave in it. Although the unit is "self cleaning" the water basically sits there, eventually dries out and leaves the whole unit covered with dirty water marks.
I've raised this a number of times with the architect who specified the roof and the fall on it but he's basically refused to discuss it.
What I have managed to establish is that most glass suppliers recommend a minimum fall of 5% with most suggesting 10%. The architect specified 1 in 80 fall, or 1.25% which would seem to me to be the root cause of the glass not draining.
So for architect types:
1. Is there a reference guide / common standard on falls that the architect should have taken into account?
2. Is 1.25% normal, and if not, what is?
3. How do I resolve the issue when the architect won't discuss it or respond to written communication on it?
The finished job has left us really underwhelmed with a permanently filthy rooflight - but as removing it and reconstructing it would probably be a good £5K+ I'd like to try and find a way of getting the architect to help find a solution for us if a cock up has been made.