Step 2 remove the shingles.
Tarring a roof valley.
Roof valleys are channels designed to drain runoff water and like any other part of your roof they can degrade over time with exposure to the elements.
Iko recommends that you install architectural shingles with the open valley method for the best roof performance.
The three methods to shingle a roof valley.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
When deciding how to shingle a roof valley you will need to consider your materials the climate and the desired look of the roof.
Valleys are typically found where gable dormer roofs meet the main roof or when a house has angled wings or additions where two roof sections in different planes meet.
This recommendation includes iko s premium shingles.
In other cases water can become trapped under shingles which have been overlaid to create the valley trough.
The valley area of a roof the straight lines formed when two different planes of the roof meet is a critical area that handles a tremendous amount of water run off.
This video shows the water proofing paper that we installed after re.
How to repair valleys on a roof.
Roofing tar will also protect your roof from wind and from snow and water which can collect on a flat roof.
Roofing tar is often used for tar and gravel roofs or to fix leaks on a roof.
Lay one and two tab shingles as you near the valley so full size shingles will run across the valley.
Check the entire roof valley carefully to locate the source of these problems.
Stop nailing 6 inches from the center.
Roofing tar is a good choice for a flat roof as this kind of material is highly resistant to the ultraviolet rays from the sun.
Roof one side of the valley running the shingles across it.
Roof valleys are troughs that discard runoff water where two sections of sloped roof meet.
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.
Snap a chalkline 2 to 3 inches past the valley center on the top layer of shingles.
How to install roofing paper in a valley section and install the valley flashing on top.
Shingle the other side of the valley the same way.
Pros and cons of roofing tar.
