Air Voids/Bubbles/Wrinkles Flintastic SA Low Slope Installation

Hi folks,

I'm a painter by trade and had the "best" roofing company in town do my roof with an additional low slope application of Certainteed Flintastic SA base and cap sheet.

There are a variety of ripples/voids/bubbles in the application which was over an OSB surface on a 70 degree day with sunshine in the Dallas area. The installation is three weeks old.

Two questions:

how much should I be concerned about the air voids?

should the cap sheet overhang the edge of the flashing? I believe the Flintastic SA handbook requires it to be flush?

I keep getting "invalid path" for my pic upload.

Thank you. I am considering having this redone.

Hi Jeff . i would ask "BEST" to come back and roll the roof with the 175# roller. your supposed to roll the flintastic with this to get all the air out. Maybe if they did it would take the air bubles out... MAYBE. keep us posted.

I had some problems with wrinkles when i first started using self adhered. I changed to GAF Liberty Cap Sheet and have not had a problem since. Everything goes down smooth and stays smooth.

I recently found the spray stuff, awesome. Although more expensive, much handier for small jobs. We run our base sheet over the fascia board too OS, and bend it over if we use heavy drip edge.

We did use to cut our cap sheet even w/ the drip edge on the sides, now we leave a small overhang. I haven't seen any problems w/ my old flush cut roofs that are about 6-8 years old.

edit: To OP - can we get some pics to poke at? Wrinkles are bad mmk.

Old school, what do you prime the metal with when using sa modified?

I agree Tinner, I've only done a few sa modified jobs, but I ran my material past the metal too. Just makes sense to me!

I would be very concerned about the voids. They'll get brittle and pop, then leak. As for the drip-edge, I run my material 1/2" over and fold it down somewhat. Later, when it starts separating from the metal, the folded down lip will help most water to go over and off the roof. When flush, if it starts separating, the water goes directly into the roof system creating extensive damage.