Repointing is basically a waste of time money what you should do is take out all the cement and re bed the tiles if done properly should last at least ten yrs.
Repointing roof valley.
Check the entire roof valley carefully to locate the source of these problems.
The roofing nails are fine so long as the lead of the roof valley is intact but once it starts to crack or fracture due to water pressure corrosion or other damage the nail provides a space for water to run into the home.
Cut each side at the upper end of the valley to conform with the.
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.
Move to the highest end of the valley and work your way down cleaning shingles from both sides of the valley whether they re damaged or not.
Take measurements of your roof flashing most flashing is 14 inches wide but yours may vary.
How to repair a crack in a wall.
By admin 4 years ago 1 817 views.
The only material that will seal your valley is a good quality cement if you want it to leak by all means use expanding foam.
A properly flashed roof valley should have an ice and water shield installed with roofing felt being properly secured over the ice and water.
This video shows how to re point the lead valley on a tiled roof safely using fibre reinforced mortar.