Plastering is a very crucial and essential stage in the construction process of any house. This is because, it determines the durability and physical appearance of the walls.
It is also very important to note that, the mortor used for plastering is not always compatible to any surface. That is, the wall or surface to be plastered must be adequately prepared to make it compactible with the mortor. This is what will make the wall to last longer.
For successful, strong and durable houses, use the plastering techniques below;
1. Clean the surface you want to plaster by removing any bits of existing plaster, dust, wallpapers, small stones and sticks.
2. Check the suction of your wall. For instance, high suction porous backgrounds can suck the moisture from the plaster. This makes it to dry fast and weak. So you need to wet the wall first before you start.
3. When wetting your walls use a fine mist spray gun to avoid having to keep reaching down to re wet your brush.
4. For low suction backgrounds such as painted surfaces, add a handful of sand to the PVA mixture to give it a rougher texture and better adhesion.
5. Treat existing plaster or previously painted surfaces with a bonding agent, such as a mixture of PVA glue and water to ensure the plaster sticks to the wall firmly.
6. Always use clean water to avoid contaminating your plaster and make it go off or set too quick.
7. Always mix plaster by adding it to water and not the other way around.
8. Add just enough plaster first to make a heap on the top of the water and mix it so that it’s lump free, then slowly add the plaster to get the correct consistency either with a wooden stick or mixer drill.
9. Ensure you mix your plaster such that it has a high viscosity. This can be made sure by putting a stick to stand in the prepared plaster. If the stick stands, then the plaster is mixed right.
10. Apply the plaster when the surface feels tacky, but not too wet to help it bond to the surface well.
Watch the video via the link below to learn more plastering techniques.
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