What is the mix for pebble dashing?

What is the mix for pebble dashing?

1 part OP Cement : 1 part hydrated lime : 5 or 6 parts sand mixed with water and plasticiser and waterproofer as recommended.

How is pebbledash applied?

Pebbledash is a form of render used for the external walls of a building in which the top coat is textured by pebbles and stone fragments to create a rough finish. The wall surface is plastered with render and the pebbledash material thrown and pressed in while still wet.

Does pebble dash stop damp?

As long as no damp proof courses are bridged, then pebble dash very rarely lets water in. Often waterproof additive is added to the render to even further reduce the chances of a water breach. In many cases, pebble dash is actually initially applied as a way to protect a house from water damage.

How do you make pebble dash look good?

A beneficial way of ridding the pebbledash look is by installing 20mm (or thicker, but the thicker you go, the more expensive) external wall insulation (EWI) boards over the top of your pebbledash. This is a great option because the EWI will give you added insulation, which can save you money on bills in the long run.

What do you need for Pebble Dash?

Things You Will Need

  • Lime.
  • Sand.
  • Cement.
  • Trowel.
  • Tarp or sheet.
  • Pebbles (or other small natural items)

Is pebbledash old fashioned?

“What most people don’t realise,” says architect Hugh Petter, “is that pebbledash is the modern version of a rendering process that dates from Roman times: a mixture of quicklime and sand, thrown at external walls to give a stippled effect.”

Are pebble dash houses cheaper?

It is not always pretty but, for a remote coastal cottage, lashed by wind and rain, pebble dash is far more durable, and far cheaper to maintain, than bricks-and-mortar.

Is Pebble Dash old fashioned?

Pebbledash covers much of the UK’s early to mid 20th century housing stock and was primarily invented to give a cheap, fairly weatherproof, low maintenance wall coating over poor quality brickwork. Pebbledash, the traditional British (and Irish) version anyway, should last between 20 and 40 years.

Should you paint pebble dash?

Unfortunately, with such a rough, bumpy surface, pebbledash isn’t really suitable for painting. The various peaks, troughs and sharp edges are a nightmare to paint – and the results are rarely good. On top of that, paint is never a long-term solution outside your home.

Why are so many houses in Scotland pebbledash?

So what is pebbledash, when did we start covering our homes with it, and is it beautiful or beastly? The modern variety is a mixture of sand, cement and pebbles or aggregate (crushed stones), applied to the exterior of houses to protect them from the vagaries of British weather.

How long does it take to Pebble Dash a wall?

Pebble Dashing the Wall Apply the initial layer of the render with a trowel. Make a very smooth coat of render. You also may want to rake or score it to help the next layer adhere better. Leave it to dry overnight or for about 24 hours.

How do you use pebbles for dashing walls?

Rinse your pebbles well and drain them completely. Put them in a large bucket, or a large flat bin you can set beneath the wall you are pebble dashing. Mix up your top coat of 5 parts sand to 1 part slaked lime and 1 part cement. Trowel this onto the wall in a smooth, even layer. Spread plastic sheeting below the wall you are pebble dashing.

Is it safe to remove pebbledash from walls?

Removing pebbledash is an extremely arduous and risk-laden endeavour. Ripping pebbledash forcibly from the walls of your home is bound to invite all kinds of structural issues – not to mention the potential invalidation of your home insurance. How to cover pebble dash?

How do you get Pebbles out of a concrete wall?

Hold the bucket or tray of pebbles below the wall and scoop up some pebbles with a scoop or trowel with the other hand. Throw the pebbles at the wall. Some stick to the cement while the rest fall to the plastic. Continue throwing the pebbles at the wall until you get an even covering from top to bottom.

How do you use pebbles for render?

Then mix more render and apply it to the wall on top of the first layer smoothly and evenly. After this step, you’re ready for the fun part. Lay a tarp or sheet under a section of the wall; then take handfuls of pebbles and throw them at the wet wall.