Wall rendering in Sheffield

What happens on a small render job

Most small jobs start with tapping. Render that has lost its grip sounds hollow, and the Building Conservation Directory's guidance on render repairs describes tapping to trace the edge of a detached area before anything is cut. A patch repair then cuts the render back until the edge sounds solid, cleans and dampens or primes the exposed masonry, and rebuilds the coats to the original thickness, with glass-fibre mesh where a crack runs from the corner of a window or door. The last coat is worked to match the texture around it.

Re-rendering a whole wall goes further. The old coat comes off the face down to masonry and is cut on a clean line at each corner. Beads are fixed before any render: one along the DPC line with a flared drip so the render ends above it, and straight stop beads where new render butts up to old. The base coat and finish follow, and the finish is applied across the whole face in one session so it has no joins. A respray, by contrast, keeps the render: the wall is washed, algae treated, small cracks filled and a coating applied.

Matching the job to the wall

Let the condition decide. A wall that is sound but faded, streaked or patchy needs cleaning and a coating, once the cause of any staining has been fixed; see recolouring one wall. A hollow patch or a cracked corner in an otherwise solid wall needs a cut-out repair. When tapping finds hollow areas joining up across most of the face, patching stops making sense and the elevation needs re-rendering; see re-rendering a single wall.

Two situations call for a different material or a wider view. An old stone or soft brick wall with cement patches or a hard cement render may be holding damp; SPAB's guidance is that hard cement stops a solid wall drying and, once cracked, holds rainwater in, so repairs there are usually made in lime. And if the hollow note turns up on every face of the house, the problem is not one wall any more. Approved Document L treats the replacement render layer as renovation. Work covering more than half of an elevation can require an insulation upgrade where feasible, while smaller patches must still be assessed alongside the total renovation work.

Sheffield walls and the local rules

In Sheffield's older stone villages, the material for a repair is a planning matter too. Grenoside is one example: the council's management proposals for the village criticise concrete render and cement pointing on its old houses, and say that boundary walls and gate piers which add to the area will normally be protected from demolition or alteration.

Across the city, the council notes that demolishing walls in a conservation area may need permission. Planning decisions for High and Low Bradfield are made by the Peak District National Park Authority, not the city council. National rules add another layer: in a conservation area or National Park, putting render or pebble dash onto any part of a house falls outside the permitted development allowance for householders. That bites hardest when a wall of bare stone or brick is being rendered for the first time.

Small jobs still have practical rules. A gable scaffold standing on the footway needs a council permit for occupying the highway, which the scaffolding firm applies for. Render products have weather limits too, so a single exposed wall is best tackled in a dry, frost-free spell. Each type of wall and repair has its own service page and guide.