Dampen the wall before you start if it is not already damp after cleaning down.
How to render a concrete block wall.
The first coat of render is also called the scratch coat apply the render with a steel plastering trowel using a firm hand to press and ensure it sticks to the damp wall.
How to complete house or wall rendering.
Apply a coat of the mixture to your concrete wall before plastering it and allow it to dry for a day.
This video from bunnings warehouse will show you how to prepare your surface a couple of rendering techniques.
How to cement render a wall next you have to load the wall between the guidance pillars with cement render.
Tilt the hawk onto the trowel and then apply the render at a 45 angle or you can place the hawk s edge on the wall and brush up from there.
Hi everyone this is me sand and cement coating this wall and giving some tips on the way i do it this is the scratch coat that is the base coat for the top.
For rendering course bricks you may need to add a little water to the surface before you start.
The first coat of render should be a very thin coat of about 5mm thick.
There are a couple of different techniques to applying render.
Consequently you should use construction buckets or a wheelbarrow to transport the material inside your house.
Next use a hawk and a margin trowel and throw the render towards the wall making sure you cover the whole surface.
Hi walls are just built so no moss etc on em no splits or cracks 50mm full fill cavity with knauf waterproof insulation dpc at start of first block so i will leave a small gap from top of dpc to start of render.
Then mix your concrete with water mist the cracks with water.
For a flat finish apply a layer of dash that is almost liquid in consistency.
To help achieve this you need to make dash by mixing one part cement to 1 1 2 parts coarse sand and add enough water so the mixture has a runny consistency.
It is one that gets professional plasterers very hot under the collar.
Who knew there.
Roger revisits a topic that skill builder covered many years ago why.
First clean any parts of the wall that you plan to repair so the cement or mortar adheres securely.
To repair small cracks or holes in cinder block walls you can use concrete.
Hose the wall down or scrub it with a washcloth then use a metal file to smooth out any rough edges.