chimney flashing on standing seam roof - Contractor Talk - Professional Construction and Remodeling Forum

kermmonk · 06-28-2006, 07:33 PM

I am about to have my stone masons saw a reglet for the chimney flashing, how high up from the roof sheathing should the reglet be sawed?

At what angle should the reglet be sawed? Roof will be 1 1/2 standing seam.

What is the best material for the flashing? copper,lead,aluminum, or the steel roofing material?

Thanks,
Kermmonk in TN

Tscarborough · 06-28-2006, 07:58 PM

It should be stepped (meaning the angle is 180 degrees, i.e. flat), at least 4 inches, preferably 8" above the roof line. The material only matters if it will be visible. If not, copper or SS will last the longest, but to avoid galvanic corrosion, it should probably be the same material as the roof.

Tom R · 06-28-2006, 08:39 PM

I cut 'em in at about 15 degrees . . .

Yeah, - - 4" absolute minimum . . .

Bone Saw · 06-28-2006, 09:06 PM

I agree with tom, far as your counter I would go with lead and either elastomeric or solarseal for caulk, will be very easy to peen the lead to conformity than trim even at your pan

Grumpy · 06-29-2006, 08:03 AM

I never do a straight flashing except at an ampron, at an incline it should be raggled, or stepped with the mortar joint. I also say 4" is minimum, but since we step with the mortar joint, it's usually a bit more than 4".

Why not just metal to match the roofing material? After all it is a metal roof. Steel SS roof = steel flashing IMO. Kynar SS roof = Kynar flashing etc...

kermmonk · 06-29-2006, 08:34 PM

Hey guys thanks for the info!

Kermmonk