Help with flat roof

[WTY433]

Hi,

I have a small (5 by 3 foot) flat roof over my bay window that isn't draining away due to dips which I want to rectify.

I bought some roof felt and roof adhesive and was going to sort of layer it to get the water to run away and seal it properly but I had a thought about using some self leveling compound of some description. The only one I can find is for interior concrete floors before tiling (B&Q) but if I'm going to seal it all, would it matter that it is "interior" and not designed for that purpose. I just want to get a flat starting point.

As you can tell I am not a builder at all but sadly I can't afford an expert. Any help would be very much appreciated before I undertake an amature job

 

[SimonH2]

The proper way would be to strip off the roof, fix the underlying problem (supporting timber not done right/boards too thin or poor quality/insufficient pitch) and relay it. If you are planning to refelt anyway, it's probably not a whole lot of extra work.

 

[catlad]

If I were you I would forget the self levelling compound and go to your local timber merchants and buy a 18mm piece of ply the size of your bay, then screw that to your existing bay roof using bits of batons/timber to tilt it to your gutters, and then I think you will have a decent base to apply your felt.