Obtain clean water and wet the surface using a brush.
Repointing roof verge.
The correct mix ratio is 3 parts sand to 1 part cement this is much stronger than bricklayers use 5 1 as the cement on the roof must withstand more driving rain than a typic.
When a slate verge is being replaced then it will be repointed as the slates are secured by nails rather than mortar.
A cement mortar is known as roof bedding.
Bear in mind that as time will pass the bedding will gradually wear out.
Mortar can be coloured to match the roof covering.
Once the tiles start to get detached it is time for re bedding.
This is a typical 3 1 roofer s mix 3 parts sand and one part cement.
Roof cement is primarily used to hold roof tiles hip tiles and ridge tiles securely in place it also keeps out rainwater.
Showing a nice bit of work pointing a verge on the end of the roof on this home in sheffield.
Bedding is important because without it the roof might start splitting as the tiles have a high chance of getting loose and falling out.
The plactizer will make the mixture easy to work with slow down the drying time and prevent cracks.
If there are repairs to be done on the roof replace worn out tiles and make sure the entire surface is covered.
Its job is to keep a lash on the roof tiles.
Rebedding roof verges by making necessary repairments.
Mix cement 2 parts building sand 1 part sharp sand and 1 part cement plus plactizer.
Colours include slate grey black brown and red.