Mortar Mix For Roof Valleys

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 typical brick wall.

Mortar mix for roof valleys.

Oldcastle sakrete roof tile mortar mix is a mixture of high strength masonry cement and sand. Meets astm c 270 specifications for type m mortar and meets south florida and metro dade building code requirements. I am going to repair the work myself and have been told that a 4 1 mix using sharp sand and a small amount of pva added to the water is the way to go. Metro dade project number 11 1222 07.

Tested extensively by the nhbc it performs as well as the best custom mix mortars. It s specifically designed for bedding clay and concrete roof tiles. It is considered to be a general purpose mix useful for above grade exterior and interior load bearing installations. If an incorrect ratio is used this is the outcome click to enlarge.

It appears that this aspect and the mortar around the verges are not covered in any guarantee. It was also highly recommended for its workability slump adhesion and strength. Loose flaky cement under ridge tiles. Hi there are lots of reasons for the mortar to fall out different pitch slopes tiles etc the way i wall the valleys up with new mortar is using the right mixture of sand and cement 3 sand 1 cement with added pva if you bed tiles in wet mortar and then leave to dry for at least 24 hours you can then add second coat of mortar making sure you coat over first coat of mortar with ova first i guarantee this will last for years also i would like to add use a very course sharp sand in your mix along.

Designed to set clay and cementitious roof tile. Strong cement isn t likely to wash out.