- How thick should a render scratch coat be?
- Can you render pebble dash?
- What is the best render mix?
- Do you need a scratch coat when rendering?
- How long wait between render coats?
- Can I plaster straight onto blocks?
- What is the best render for a house?
- How do I stop my render from cracking?
- What is the correct mix for Pebble Dash?
- How thick is render and plaster?
- Do you put Waterproofer in both coats of render?
- Is rendering easier than plastering?
How thick should a render scratch coat be?
The normal thickness is between 3 and 5 mm.
On soft or weak background use 1:2 or 2:5.
Successive coats must be weaker than this coat..
Can you render pebble dash?
If the home owner wants to completely get rid of the pebbledash, it can be rendered. This can be with a coloured render, which saves on repainting, or sand and cement render, which will need painting once it’s on the house. A professional builder will remove all the old pebbledash and render over the bare bricks.
What is the best render mix?
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.
Do you need a scratch coat when rendering?
Apply the render with a steel plastering trowel using a firm hand to press and ensure it sticks to the damp wall. The first coat of render should be a very thin coat of about 5mm thick. … There is no need to scratch right down to the original wall surface, just deep enough to provide a key for the second coat.
How long wait between render coats?
If you are applying more than one coat, you will need to let each coat dry for at least 3 – 7 days. You will then need to scour each coat with a sharp object to provide a good surface for the second coat of render to bond to.
Can I plaster straight onto blocks?
Plastering directly to bare brickwork or blocks, known as ‘wet plastering,’ is still favoured by some for its superior soundproofing. A cement render or gypsum backing (known as a scratch coat) is first troweled directly onto blockwork before this is finished off with a thinner skim coat.
What is the best render for a house?
Lime plaster is a great option for those looking for a breathable house rendering system. The advantages of lime render in include: It is more flexible than cement. It is breathable so prevents problems with moisture getting trapped within the wall — a common problem where cement renders are applied to old walls.
How do I stop my render from cracking?
You should not use sand that lacks fine material and if it does then you should add some lime into the cement. However, one sure way to prevent shrinkage cracks particularly is with the use of fibres in the mix, which will take some of the force of the movement through the material.
What is the correct mix for Pebble Dash?
1 part OP Cement : 0.5 part hydrated lime : 4.5 parts sand mixed with water and plasticiser and waterproofer as recommended. 1 part OP Cement : 5 or 6 parts sand mixed with water and plasticiser and waterproofer as recommended.
How thick is render and plaster?
The normal thickness is between 3 and 5 mm. On soft or weak background use 1:2 or 2:5. Successive coats must be weaker than this coat. The thickness of the first coat depends on the nature of the background and the overall thickness required of the render.
Do you put Waterproofer in both coats of render?
If you speak to the manufacturers cementone, feb etc they all recommend putting it in both coats. There is nothing wrong with doing this is some might argue. Remember you shouldn’t use lime if you are using waterproofer. I tend to put the full amount recommended in scratch and half it for the top coat.
Is rendering easier than plastering?
in a word no rendering is not easier than plastering.