Remove the old roofing.
How to install metal roof ridge to valley tie in.
However these shingles are not run entirely through the valley area but rather the center of the metal valley is left exposed.
The top joinery of both valleys when they meet on the same plane of roof is shown here.
Install synthetic roofing underlayment or felt paper according to manufacturer specifications and then install the first piece of valley flashing.
The ridge cap is the last thing to put on when installing a metal roof.
How to install ridge cap foam closures on a metal roof for a non vented ridge cap.
See the illustration below.
Although ridge caps can come as shingles and may have a feature such as the ability to self vent or include a skylight the.
Cut the panels from the ground instead of on the roof to avoid damaging the roof with the debris.
Apply butyl tape sealant at to the inside of the chalk line on both sides of the ridge cap.
Now that i ve finished installing the transition trim we can install an offset cleat so that we can clip our upper panels into it.
How to seal metal roof valley.
Although you can install corrugated metal roofing over shingles for the best foundation it is recommended that all the old roofing be removed.
Fold the top over the roof ridge and cut the bottom along the drip edge metal.
We have our pitch change trim installed with an offset cleat on top of it and we ve made sure to use tape seal in between the cleat and the transition trim.
I have my valley custom made with water trough to help with leaking b.
Center a piece of ridge cap on the building peak.
Work at a comfortable steady pace trying not to rip up or carry off too much old roofing at once.
In addition it is important to avoid nailing the shingles through the valley metal.
Locate the butyl tape so that the ridge fasteners will penetrate at the center of the butyl tape once the ridge cap is in place.
If the ridge is only 15 20 long repeat step 1 at the opposite end of the ridge.
Low slope roofs slope less than 3 12 use tape sealant between the valley trim and the panel.
As the asphalt shingles are installed over the roof deck the shingles are extended into the valley.
Best practices for sealing the metal roof valley vary based on the slope of the roof.