Pebbledash removal in Harrogate

Original finish or later cover-up?

Roughcast and pebbledash belong to the late Victorian and Edwardian fashion for cottage styles. Tendring District Council’s conservation guide describes roughcast as a coarse render mixed with gravel, and pebble dash as a slightly later type where dry aggregate is thrown onto wet render. Harrogate’s 2010 appraisal lists walls of brick or render with occasional pebbledash among the details of the later Duchy Estate houses. On a house like that, stripping the dash changes the character of the building, and in the conservation area it is a planning question as well as a design one.

Elsewhere, dash was put on later to hide weathered brick or patched walls. Once cracked, that cover can hold water against the wall, and removing it is often justified.

Remove it, or overcoat it?

If the dash is firmly bonded and you simply dislike the look, removal is not the only route. K Rend, for one, makes an overcoating dash receiver designed to go over existing dry dash without a base coat, so a new dash or finish can be built on top, and a masonry coating can change the colour. These options keep the wall covered and avoid any risk to the brick. If tap-testing finds hollow areas, cracks or dash coming away, the failed parts must come off before anything goes over them.

What removal involves

SPAB’s advice on hard renders applies: test a small area first, work by hand with a hammer and chisel, and avoid levering off large sheets that can pull the face off soft brick or stone. Power tools are for very experienced hands only. The work is slow, dusty and noisy, so windows are sealed, paths and planting covered, and rubble bagged and taken away as it comes down.

Underneath you may find sound brick, but also patched brickwork, filled-in openings, mixed materials or a face damaged where the dash was keyed on. That is why the next stage cannot be fixed until the wall is bare. Some walls can be repointed and left; many need a new render.

1. 1

   Tap-test the dash and remove a small trial patch.

2. 2

   Protect windows, doors, paths and neighbouring property.

3. 3

   Hack off the dash by hand, working down the wall.

4. 4

   Brush down and assess the exposed brick or stone.

5. 5

   Repair and repoint; replace damaged bricks; dub out hollows.

6. 6

   Re-render, or repoint and leave bare where the masonry allows.

The new finish and its edges

Most walls are re-rendered after removal. The choice follows what was found: lime on older soft brick or stone, a sand-and-cement or through-coloured render on harder brick, or a thin-coat silicone system on a meshed base coat. Whatever goes on should stop on a bell-cast bead just above the damp-proof course, turn neatly into the window reveals and meet the sills so their drips still throw water clear. Dash often hides cracked sills and loose window heads, so allow for those repairs.

In a conservation area, check whether replacing pebbledash with smooth render needs permission: the government’s technical guidance lists both pebble dash and render among cladding materials that are not permitted development on such land.

Afterwards

A newly rendered wall needs protecting from rain, sun and frost while it cures, as the house rendering page explains. Keep photographs of the bare wall before it is covered again. They show where repairs and old openings are, which helps anyone who works on the wall later.