BUR or Single Ply for porch roof?

[Lee23]

This is an existing home in NE PA that has a second story, covered porch. The porch roof leaks at the edges and is presently covered by poorly installed single-ply membrane roof. It abutts a pitched shingle roof a with a chimney near one corner.

Which roofing system would be best - a built up roof or one of the newer single-ply membrane roofs?

My concerns are overall adhesion to the existing porch roof deck, the interface to the shingled roof and the drip edge.

Thanks!

 

[msquared48]

Better make sure the deck is well vented on the bottom too.

Best to call in a reputable local roofing firm here for their opinion.

Mike McCann
McCann Engineering

 

[JKW05]

I assume this is a flat roof. Perhaps you could mechanically fasten a new cover board (e.g. G-P DensDeck) to recieve the new roofing. Check the additional DL (which is minimal).

If it is leaking at the edges, there may be some flashing problems. Is there a roof drain? Scuppers? Does the water just "flow over the edge"? Those are all details to look into as well.