Rendering is work is best done in European countries, with cement. It is quite similar to plastering the wall. Cement rendering imparts a classic look to your house. Rendering can be in many ways, but cement rendering looks aesthetically beautiful. Not only, the beauty part, have they even had benefits like wall proofed from water. Well, indoor rendering and outdoor rendering are not the same; the cement mixture in both vary respectively.
Well, now the question comes exactly what proportion of cement rendering will give that even plastered look in the wall?
The cement rendering ration varies. Mixing enough water with proportionatecement is a necessity. Most render use cement, water, sand and lime in proportional ratio. Most of the cement rendering company follows the ratio of 6:1:1 (6 parts of sand, 1 part of lime and 1 part of cement with adequate water.)The sand need for wall rendering has to be pure and clean. Any kind of impurities in the sand will not be able to hold the cement. So, it is advisable to refine the sand once before mixing thee rendering.
Well, there are two layers to cement rendering for the wall. The first one is scratch or base and then the final rendering. For the scratch rendering, some like to mix the ration in 4:1:1 (4part of sand, 1 part of lime, 1 part cement).
The necessity of lime in a rendering mix is inevitable as it holds on to the cement, preventing any cracking or damaging after the cement wall dries up. Make sure the lime is hydrated adequately. Without adequate hydration, the lime will not be an able mix up properly with the other materials.
Do not forget the importance of the right proportion of water, too much or a bit less can create a huge difference, which would be only evident after the work is done.
One small tip for wall rendering would be done not use extra cement or lime, as after they are put out in the wall, the cement can get shrink or compressed, which may lead to cracking the surface.
Buy some acrylic product as they help in mixing up. Use trowels, brush, sponge to finish the scratch coat and the next coats. Use acrylic render as the have super water resistance. Layer thin base with trowel and brush, and then go for the second coat with a sponge.
What could be the lifespan of rendering?
Well, cement rendering can stay up to 25years to 30 years if the ratio is maintained properly. Do not use impure sand.
Lastly, you must invest money on maintaining ace in an interval of 3 to 5 years. Even the ‘finest art needs maintenance.’