Rough Casting

Durable, weatherproof render applied the traditional way. We supply and apply rough casting to protect exterior walls and refresh tired-looking elevations.

A finish built to take the weather

Rough casting is a wet-dash render that’s thrown onto the wall rather than trowelled smooth, giving a textured finish that sheds rain and copes well with exposed elevations.

We prepare the surface properly before casting so the render keys in and stays put — a rushed base coat is the most common cause of render failing early.

Typical use
Exposed walls, gable ends, older properties
Materials
Sand and cement or lime-based render
Includes
Prep, base coat, cast finish

What’s included

Full rough casting scope
01

Surface preparation

Old or loose render removed and the wall cleaned back to a sound base.

02

Cracks and defects made good

Masonry cracks and gaps repaired before any render goes on.

03

Beading and edge trims

Corner beads and stop ends fitted for a clean, straight finish.

04

Base and scratch coat

A key coat applied and scratched to give the final layer something to bond to.

05

Cast finish coat

Render thrown on by hand for the traditional textured rough cast surface.

06

Curing and protection

Fresh render protected while it cures so the finish sets evenly.

How a rough casting job runs

01

Survey

Existing render and wall condition checked to plan the right build-up.

02

Prepare

Old render stripped where needed and the substrate made sound.

03

Coat and cast

Base coat applied first, then the final layer cast on by hand.

04

Finish and check

Edges, corners and coverage checked once the render has cured.

Common questions

How long does rough casting take to cure?

It depends on the weather and coat thickness, but the render typically needs several days of dry conditions to cure properly before it’s left exposed to heavy rain.

Can rough casting be applied over existing render?

Only if the existing render is sound. Where it’s cracked, hollow or coming away from the wall, we strip it back first so the new coat has something solid to bond to.

Does rough casting need painting afterwards?

Not necessarily — the render can be finished with a coloured mix so it doesn’t need painting. If you’d prefer a painted finish, that can be arranged once the render has fully cured.

See all our services

Rough Casting is one of ten services we cover, from repairs to leadwork to property maintenance.

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Who’s doing the work?

Meet the team behind Mastershield and how we work on site from start to finish.

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