Roof Tile Bedding Mortar Mix Ratio

Each of the standard mortar mixes types n m s and o has different performance characteristics for different building.

Roof tile bedding mortar mix ratio.

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. Loose flaky cement under ridge tiles. If an incorrect ratio is used this is the outcome click to enlarge. The bedding holds the roof tiles in place and the pointing helps create a stronger hold and tighter seal.

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. Broken or cracked mortar may also cause roof tiles to shift or loosen. 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. Left unchecked the loose tiles can become a safety hazard.

Mix in another 0 125 us gal 0 47 l for every 12 5 lb 5 7 kg of concrete you use. Gradually add 4 litres of clean water per 20kg bag ensuring it does not wash away any of the cement. Mortar mix is a critically important building component that must be combined thoroughly. The tiles may potentially slide off the roof and cause injury.

Mix the mortar thoroughly to ensure a consistent mix. 1 mix 3 parts sand to one cement. Place the required amount of roof tile bedding mortar into a mixer or onto a non absorbent surface. Strong cement isn t likely to wash out.

Mix the mortar well so the additive gets evenly distributed throughout it. All tiles except plain tiles 2 parts soft sand 1 part sharp sand and 1 part cement. Unfortunately some profiled roof tiles require a very thick bedding of mortar so to reduce the risk of cracking sharp sand should be introduced to the mix for most tiles.