What kind of roofing material is this?

[swarga]

I did an inspection today on a 1998 home that had an addition installed sometime after that. The addition has a flat roof with what appears to be a vinyl cap sheet. It is tan with small fibers embedded into it in a small diamond pattern. Photos are attached. Has anyone seen this before. Any information will be helpful. I leaving to go do a google search after I post this.

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[swarga]

Hey, I found it.[:-graduate] http://www.azom.com/details.asp?ArticleID=1028#_Background

Im surprised I've never seen this before. The site says it's been around for 40 years.

[hausdok]

Hi Scott,

Without going to look at the site, it looks like it is a fabric-reinforced PVC membrane. I see them here every once in a while, although I've never run into one that was that color.

They're actually welded together with heat and are custom made off-site, using finite measurements taken from the roof. Everything, including the plumbing vents usually gets covered here and those things are stretched like a drumhead over the roof and fastened around the perimeter.

Around here, they're a popular option for seniors to re-roof their manufactured homes.

ONE TEAM - ONE FIGHT!!!

Mike

[Ralph Smith]

Hi Mike - Scott,

This is definatly a type of nylon reinforced PVC single ply membrane.

Comes in 5', 7', 10, 20' x 50' or 100'rolls. Can be fastened mechanically or adhered. Larger rolls are usally ballested with large round gravel.

[Tiny]

That system is a duro-last roofing product. but the details are not spec it looks like hagpog.[:-paperba

[BornaRoofer]

Its definitly a pvc/tpo type roof. I don't believe its a durolast though. Durolast has factory seams,drain inserts(inverted boots) and one way vents. I don't see any of those on this roof. The seams on durolast also have the name molded into the factory seams.