Jim calculated the number type and placement of vents necessary to keep the interior of the home cool.
Sa sheet for the valley of a roof.
Stop nailing 6 inches from the center.
Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.
And either an organic or modified underlayment depending on whether tiles or shingles are being installed.
If the ice and water shield is missing then you will have to remove the shingles on both sides along the valley put ice and water shield in place and re shingle the roof.
In order to shingle this kind of roof valley a roofing professional has to install both roof faces at the same time which is quite slow.
Valleys are a prime leak area so it s important to be careful.
If repairs are needed the contractor has to remove and then reweave multiple shingles to replace a single one.
Roof valleys are like gutters with a steep pitch but the stakes are higher for valleys than they are for gutters.
In a previous video we covered how to flash roof edges before shingling.
A roof using the open valley style involves placing a v or w shaped piece of metal usually galvanized or sometimes copper in the seam of the valley and then covered with a base sheet such as 30lb.
Shingle the other side of the valley the same way.
South valley roofing out of 9 companies that i checked for proper venting on a residential roof turned out to be the best option for us.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
Long island valley a young roofer from long island first showed me what i now call a long island valley.
First clean the debris out of the valley including sawdust nails and whatever else is in there.
Valley flashings are custom fabricated to any measurements and angles and usually measure 10 in length but can also be bent in 12 lengths.
The open woven and closed cut methods are demonstrated.
Roof one side of the valley running the shingles across it.
A type of closed valley is a cut valley where the shingles from the adjacent slope are cut parallel and just short of the center of the valley.
This is a type of closed valley where.
With sheet metal protecting the lower layer of shingles the shingles on top are cut back to the line right.
In this video we ll flash the valley.
While a woven valley may save on initial installation costs because they require less.
For example in metal roofing systems valleys are commonly fabricated with hems but can also be fabricated without them in which case they could still be used for metal roofing or any other type of roofing.
A poorly cut valley is a quality issue on installation rather than a defect so refrain from having roof replacement if you don t see any leakage.
This valley looks the same as a cut valley only it s faster to install.
Gaf mastering the roof chapter 12 this video demonstrates the proper installation technique for installing roofing valleys.
