How do you underlay a valley?

Quote from the video:
Quote from Youtube video: Additional pieces to overlap by at least six inches remove the temporary nails Center a minimum 24 inch wide minimum 28 gauge prefinished galvanized metal valley liner in the valley.

How do you install roof valley underlayment?





Quote from the video:
Quote from Youtube video: Cut underlayment with a utility knife to manageable size lengths especially when working alone on the adhesive. Side locate the pull cord embedded along the center.

How do I protect my roof valleys?

First, we cover each valley with rolled metal to keep each roof deck panel from moving when we step on the roof deck. If those panels move, they can tear through the layers on top of it. Next, we cover them with ice and water shield for an extra layer of protection against leaks.

How do you waterproof a valley on a roof?

Quote from the video:
Quote from Youtube video: The roof will get a layer of peel-and-stick membrane. And the valley will get an additional layer of metal flashing on top. But first clean up the valley of shingle scraps loose nails sawdust.

How do you prepare a roof valley?

Quote from the video:
Quote from Youtube video: Color secure this layer with a nail every 40 centimeters. The visible part on top should be 16 centimeters wide eight centimeters left and eight centimeters right of the centerline.

What is the best material for a roof valley?





Roof valleys are typically made of lead, concrete or fibreglass. Aluminium is now growing in popularity, as a lightweight and rust-resistant alternative to older iron/steel valleys. No doubt as technology continues to improve we’ll see valleys with incredibly long lifespans that resist the elements incredibly well.

Should you use ice and water shield on valleys?

Quote from the video:
Quote from Youtube video: And it's also self-healing to a degree. So you put the scenarios like valleys around dormers. Where roof slopes meet walls.

How do you Sheet a roof valley?

Quote from the video:
Quote from Youtube video: So all you got to do is take your 64 and a half. And then you're 24 and a half and then whatever that line is from here to here is going to be your first sheet.

Is valley flashing necessary?

Closed valleys aren’t required to have metal flashing, but they should have additional underlayment lining the valley, preferably a couple layers of roll roofing. You can usually see whether this has been done by looking carefully at the bottom edge of the valley.

What is valley liner?



Open Valleys



A lining made of metal protects the valley from moisture intrusion. You may encounter defective valley lined shingles installation, failed roll-roofing valley liners, or a cross wash where water running down a roof slope flows across the valley and up beneath the shingles on the adjacent slope.

How do you close a valley of shingles?

Quote from the video:
Quote from Youtube video: Start by applying the first course of shingles along the eve of the intersecting portion of the roof. This shingle should extend over the valley and into the adjoining roof plane.

How do you start a valley shingling?

Directions for How to Shingle a Valley



Bring enough 18-inch aluminum flashing up to the roof to cover the length of the valley. Line the flashing up with both chalk lines and press it into place down the seam of the valley. Use a rubber roller to press the flashing flush with the valley.

How do you install GAF shingles in a valley?



Quote from the video:
Quote from Youtube video: Begin by installing full courses of shingles in one direction. Making sure to overlap the valley centerline by at least 12 inches avoid nailing within six inches of the valley. Centerline.

Which side of the valley do you shingle first?

Quote from the video:
Quote from Youtube video: We want it to be going over the top and being able to run down that slope okay so we want the water to shed with as little resistance as possible that way it flows out of there.

How do you tarp a roof valley?

Wrap the rope around the board and pull it tight against the roof, covering the roof with a tarp. Attach it beneath the eave using a screw gun. Finally, secure 2 x 4 boards to the tarp’s bottom. This will keep the water out and secure the tarp.