sand and cement isnt compatible with cement board.
if you get you or your plasterer to look up thin coat render you will see the difference.
these renders are warranted and.
designed for these build being thinner lighter and flexible to take the movement of the timber.
Can you render onto cement board?
Cement particle boards or render boards are normally fitted on timber frame builds and then the rendering is normally carried out over the board. However there are a number of problems that could arise with cement particle boards if not fitted properly or if the incorrect render system is applied over it.
Can you K Rend over sand and cement?
We use K Rend and we find it to be a more superior product to sand and cement render. You will then need to apply a slurry mix to the brickwork to ensure there is sufficient key to the existing brickwork and that you do not get LIVE render again when it completed.
What is the best mix for sand and cement rendering?
A common mix ratio used for rendering is 6 parts sand, 1 part cement and 1 part lime. Any general purpose cement can be used, although the sand should be fine and clean of impurities. Coarser sand is usually used as the base layer and slightly finer sand for the top layer.
Why does sand and cement render crack?
Cracking caused by failure to replicate underlying movement joints. It stands to reason that if the underlying substrate has inbuilt movement joints then these need to be replicated directly above in the render coat. If the render coat cannot accommodate and mirror the underlying substrate movement then it will crack.
Can you render onto OSB board?
The simple answer is that applying render directly onto the OSB is not an ideal situation – it’s important to remember that at the end of the day, OSB is wood.
Can cement board be used outside?
It can be used on the exterior of buildings as a base for exterior plaster (stucco) systems and sometimes as the finish system itself. Cement board adds impact resistance and strength to the wall surface as compared to water resistant gypsum boards.
Does K Rend crack?
K-Rend also Cracks Eventually!
To be honest, any thick render system is liable to cracking; it is not just sand and cement render. K-rend and other scratch renders are also more likely to crack than more modern thin-coat renders.
Is K Rend expensive?
Cost Of K-rend Silicone TC thin coat render system per square metre. K-rend thin coat systems are generally a little more expensive compared to their scaped renderers such as “k1” and “silicon Ft”.
How much does 1 bag of K Rend cover?
Coverage:- 2 sqm Per 25kg Bag
It can also be used as a scratch coat plaster for internal and external work, as bedding for pavia and as a rubbed up finish suitable for external painting.