I have a flat roof over a portion of my kitchen. It is 10' x 12' and it drops maybe 1" over the span of 10'. Does anyone know of any roofing/waterproofing products for that type of application. All of the asphalt based solutions I have looked at have seams and are designed for at least some slope.

Is there anybody that used a PVC solution or similar - any product names???

 

Basically all roofers will tell you that there is no product known to man that can really keep all water out. Not even plastics or metal will keep out all water. But I've tried foam products with moderate success. Anywhere there is standing water, it becomes a swimming pool and will stay until evaporated. This can take weeks sometimes and the water WILL seep, especially where the scupper or any joints of any kind exist.

You are best off trying to create some sort of a slope if you can, even if it's very modest. Any slope where water will run off is best. If you want a cheap do it yourself method, try plywood over some kind of filler foam spray that you can spray underneath. Jacked up but might work.

 

I would call a local home inspector. He'll be able to tell you what holds up best over time.

 

SDCGTSX is right, unless you get something akin to about 1/4" per foot, and preferably 1/2" per foot, any roofing material you put up may be put to real stress from standing and pooling water. His suggestion is one alternative, another would be to use tapered insulation. Probably more expensive, but gain some R-value at the same time.

Getting roofing to hold up in the middle of the material is easy. Failure usually occurs at the joints, pressure points and flashing edges where water accumulates to run off. Make sure your flashing assembly is top-notch, whatever you do.

 

a pic would help a great deal

 

I'd post a picture of money but you know what it looks like. Probably a green piece of paper with a picture of a dead white guy.

 

i think what you may want is an elastomeric coating system.