I had a contractor place the screws for my metal roof in the small raised portion (not in the flat) because he told me he's had far fewer warrantee issues with leaking. However, all the pictures I see show the screws being placed in the flats directly next to the ribs. Any experiences out there with placing the screws in the small raised portion of the metal?
Fewer? A quality installer shouldn't have issues with leaking.
As for screw placement, that's debatable.
Place them in the flat and they are subjected to more water. Place them on the rib and they may not get proper compression of the gasket due to void under the rib. This can also distort panels.
I've seen both methods. I prefer to place them in the flat. I make sure to discuss this with the owner and include it in the contract.
It should be installed to manufacturer's specs. It could void the warranty. Also go to the manufacturers website and look at the instillation guide.
Have him do it the proper way.
I have never seen any steel manufacture stand by any warranty or specs. It depends on the metal if it is coretin or any other corrugated metal no screws in the valley or flat part of metal, if it is a tuffrib or deltarib put screws in the valley. If you live in a snow area this will help with ice and snow sheering screws of and me coming to fix your new roof.
I've seen both and done both methods when doing barn/shed roofs. All are good for a few years. A house shouldn't have exposed fasteners.
Thats what i tell H\O's shouldnt have exposed screws on home, barn or shed is different.
The CBR panel used for roofing the screws are placed in the flat of the panel for proper compression of the panel to the hat channel. The only rib that get screwed is the panel lap. acap screw is being used now to replace the old deck screws.The flang runs over the washer instead of just pancaking on the washer the new style is better and the washer is thicker. The roof inspector should see the difference of improper placement.
"Place them in the flat and they are subjected to more water. Place them on the rib and they may not get proper compression of the gasket due to void under the rib. This can also distort panels".
pretty good slave,
i hope that wasnt a cut and paste.
im assuming were talkin about 5vcrimp panels.
ive doen em both ways for years for different reasons,
but have come to the conclusion that puttin in the v
is better , and a couple in the flat at the edge.
its better cause the one in the flat holds up debri.
debri catches on the screws and piles up. i never thought of it but it would probably hold snow up too.
so i have been puttin em in the v for many years now.
yes it is harder to keep roof looking good.
cant screw em to tite, cant screw em to soft.
gives me somethint to yell at my guys about.