Repointing is the process of repairing damaged mortar in brick work masonry or roof tiling.
Roof pointing mix.
If an incorrect ratio is used this is the outcome click to enlarge.
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.
This ratio of sand to cement is ideal for exposed areas such as the roof without being stronger than the bricks or ridge tiles you are working with.
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The bedding is typically made of cement mortar which was also commonly used for the pointing.
Broken cracked or otherwise damaged mortar is the primary entry point for moisture into the home.
Metro dade project number 11 1222 07.
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If we re talking about common roofing jobs like pointing a chimney laying ridge tiles or flaunching the top of a chimney i would recommend a 3.
Check out our range of roof tile pointing products at your local bunnings warehouse.
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Once inside the moisture continues to do damage so repointing is a necessary part of home maintenance.
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March 23 2016 flexible pointing or flexi point is a water based polymer compound that adheres to roofing tiles and ridge caps on tile roofs in australia.
It s main purpose is to keep moisture out thereby protecting the roofing system and underlying bedding.
Strong cement isn t likely to wash out.
Oldcastle sakrete roof tile mortar mix is a mixture of high strength masonry cement and sand.
In 1995 cement mortar was replaced with a flexible pointing compound for roof pointing.
Loose flaky cement under ridge tiles.
When either of these components becomes damaged or worn you may experience roof leaks and other types of roof damage.
Jad our qualified roofing specialist teaches you how to point your tiles using monier s flexible pointing for ridge tiles in this instructional video.
1 mix 3 parts sand to one cement.
Advantages of roof repointing and rebedding.
Meets astm c 270 specifications for type m mortar and meets south florida and metro dade building code requirements.