Best practices for sealing the metal roof valley vary based on the slope of the roof.
Metal rib roofing installation in valley.
Install the roof substrate according to local building code requirements.
Between the shingles and metal roof panels is a standard practice.
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Boral roofing developed the ribbed valley metal and provides nothing less to insure a free flowing valley that will protect the structural integrity of the roof valley.
3 5 rib installation guidelines caution.
Mighti rib panels install panels overlapping eave and valley trim.
This guide is supplied by fabral inc.
Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof line.
Be sure the larger edge is laid so that the small edge of the next panel will overlap it.
For use by its customers and is intended to be a guide only.
A poorly designed valley can quickly lead to significant damage.
Install the roofing screws vertically along each rib in the panel.
Grand rib 3 style metal roofing can be separated from the moisture barrier by minimum nominal 1 x3 yellow pine battens spaced on maximum 24 centers or according to asce calculations where applicable.
Low slope roofs slope less than 3 12 use tape sealant between the valley trim and the panel.
Hip trim install hip trim over panel edges at each hip.
The top joinery of both valleys when they meet on the same plane of roof is shown here.
How to seal metal roof valley.
Install the panel a minimum of 3 up from the water diverter at the bottom of the valley and minimum of 3 down from the top of the valley.
5 rib roofing panels must be applied on a minimum roof pitch of 2 12 or greater.
Cut the panels from the ground instead of on the roof to avoid damaging the roof with the debris.
Begin at the eave.
Valley trim install valley trim in any valleys.
This guide must by read in its entirety before beginning installation.
I have my valley custom made with water trough to help with leaking b.
Lap over eave trim and work upward.
Preformed valley trim panel wood screw tuff rib panel.
It s made from the highest quality metal in the industry giving your customers peace of mind that their buildings will be protected.