Full House Re-skim After Rewire and Renovation in Newham, East London

This Victorian terraced house in Newham, E6, had recently undergone a full electrical rewire as part of a wider renovation programme. The property featured multiple rooms across two floors, including a large ground-floor reception room visible in the photos. The room shows a freshly fitted radiator, new electrical back boxes, and re-routed surface-run conduit, all indicating the property was mid-renovation and ready for its final plastering stage before decoration could begin.

The walls throughout the ground-floor room were in a severely disrupted state following the rewire. Numerous circular chased holes — each roughly 100–150mm in diameter — were visible across multiple wall faces where new electrical back boxes and conduit runs had been installed. The existing plaster had been hacked back in several areas to expose the underlying substrate, leaving patches of bare bonding coat and brick visible at various heights. One section of wall near the doorway showed a large irregular area of hacked-back plaster approximately 600mm wide, likely where old pipework or cabling had been re-routed. The floor was bare screed and the room contained loose plasterboard offcuts and building debris, confirming the property was in active renovation.

The scope covered a full re-skim of all walls within the ground-floor room following completion of first-fix electrical and plumbing works. This included filling and making good all chased holes left by the electrician — there were at least eight to ten visible circular holes across the walls from new back box installations, each requiring individual packing and bonding before being brought flush with the surrounding plaster surface. The large hacked-back section adjacent to the doorway required a bonding coat application to re-establish a stable, even substrate before skimming. All remaining wall surfaces that still held their original plaster were assessed for adhesion and suction before receiving a PVA dilution wash to control porosity. Once all patched areas had fully cured and dried, the entire wall surface received a continuous two-coat skim using British Gypsum Thistle Multi-Finish plaster, applied wall by wall to maintain a consistent wet edge. Ceiling surfaces, which appeared to be previously skimmed plasterboard, were assessed for any disruption from the rewire and prepared accordingly. The boiler and consumer unit boxing on the far wall was plastered around cleanly, and all electrical cables were left protruding neatly through the finished skim for the second-fix electrician to terminate.

Before any skim coat was applied, each chased hole was packed with a sand-and-cement filler or Bonding coat, built up in layers to avoid shrinkage, and left to cure fully. The large bare bonding areas were abraded with a devil float to provide a mechanical key. All wall surfaces were assessed for suction — the exposed bonding patches showed high porosity and were sealed with a 4:1 PVA and water mix, applied with a brush and left to become touch-tacky before plastering commenced. Dust and debris were cleared from the floor, and the radiator and boiler pipework were masked to protect them during the skim application.

With all patched areas cured and primed, plastering began at the far wall and worked systematically around the room. Each wall received a scratch coat of Thistle Multi-Finish plaster applied at approximately 2–3mm thickness using a stainless steel hawk and trowel, pressed firmly into the surface to ensure full contact across both the original plaster and the newly bonded patch areas. The scratch coat was laid on in vertical sections and ruled off with a feather-edge darby to maintain a flat plane across the wall, paying particular attention to the transitions between the patched sections and the existing plaster to avoid stepping or ridging. Once the scratch coat had stiffened to the correct green stage, a second finishing coat was applied at 1–2mm, brought to a tight, flat surface using a clean, damp trowel. This second pass eliminated any trowel marks and consolidated the surface ahead of painting. The ceiling, which showed no significant disruption, received a light skim to freshen the surface and provide a consistent finish across the whole room. All electrical back boxes and conduit tails were worked around cleanly, with plaster feathered up to each fitting without leaving proud edges. The finished skim was left to dry naturally with doors and windows slightly open to promote even drying without draughts.

The principal challenge on this project was the sheer number and spread of chased holes left by the electrician. Rather than one or two isolated patches, there were eight to ten individual circular voids distributed across all wall faces at varying heights, plus a substantial hacked-back zone beside the doorway. Each hole had to be individually assessed — some had been chased into the original sand-and-cement render, others had gone through to bare brick. Any attempt to skim directly over unfilled or partially dried patches would have resulted in the finished skim cracking back along every repair line, creating a map-cracked surface within weeks of decoration.

Each chased hole was packed in stages using Bonding coat, built up no more than 10–12mm per pass to prevent shrinkage cracking, with each layer scored before the next was applied. The large doorway zone was treated as a full bonding coat patch, floated flat with a derby and allowed 24 hours to cure before skimming. Once all patches matched the surrounding plaster plane and had been PVA-primed to even out suction, the continuous two-coat skim was applied across the full wall surface, tying the repairs invisibly into the surrounding original plaster and delivering a flat, crack-free surface ready for mist coat and decoration.

The completed re-skim delivered flat, continuous wall surfaces throughout the ground-floor room, with every chased hole and hacked-back patch fully integrated into the surrounding plaster. No ridges, steps or repair lines were visible across any wall face. All electrical back boxes sat flush within the finished skim, ready for socket and switch faceplates to be fitted by the second-fix electrician. The ceiling presented a clean, consistent surface matching the walls. The room was left dust-free and ready to receive a standard diluted mist coat as the first stage of the decoration programme.

The client was able to hand the room straight over to their decorator within 48 hours of the plaster reaching full cure. The electrician returned to second-fix all outlets and light fittings without any remedial plastering required. The renovation programme stayed on schedule, and the client avoided the cost and delay that would have come from having to call a plasterer back to fix cracked or uneven patches after decoration had started. The finished walls required no further preparation beyond a standard mist coat before painting.

Plastering over a rewired property is one of the more technically demanding re-skim jobs a plasterer will undertake. The combination of multiple patch repairs, varying substrate types — original sand-and-cement render, bonding coat, and bare brick — and the need to tie everything into a continuous flat surface means that cutting corners at the preparation stage inevitably shows up in the finished decoration. An experienced plasterer understands how to manage differential suction between old and new surfaces, how to build up deep voids without introducing shrinkage, and how to apply a skim coat that reads as a single flat plane across the entire wall rather than a patchwork of repairs.