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Internal and external plastering · Dry lining · External wall insulation · Extensions

Plastering and external insulation, done properly and left tidy.

Walsh Plastering & Construction plasters and skims inside, renders and insulates outside, and takes on extensions and renovations from the blockwork to the finish. One crew, two vans, the same standard on every job.

A finished gable and front corner in cream render with a crisp white window reveal
External wall insulation and a cream render finish on a semi-detached bungalow, September 2026.
Built on quality and trust
Free, no-obligation quotes
Inside and outside
Extensions and renovations
What we do

Everything a wall needs, from the first coat to the last

If your job is not on this list, ring and ask. The answer is usually yes.

External wall insulation

Insulation boards fixed to the outside of the house, meshed, base-coated and finished in the render colour you pick. Warmer rooms, lower heating bills and a house that looks new from the road.

External rendering

Sand and cement or a modern silicone finish over block, brick or old render. Straight lines at the reveals, clean edges at the eaves, a colour that lasts.

Internal plastering

Scratch coat and float on new blockwork, or a full re-plaster where the old walls have gone. Flat, square and ready for paint.

Skimming

A thin finish coat over plasterboard or sound old plaster. The quickest way to make a tired room feel new again.

Dry lining

Plasterboard fixed to walls and ceilings, taped and jointed or skimmed. Cleaner and faster than wet plaster where it suits the job.

Energy upgrades

Insulation that brings an older house up to today's standard, usually starting with the outside walls. Ring us and we will tell you what would make the biggest difference to your house.

Home extensions

From the blockwork up: the walls, the plaster, the render and the finish, with one crew from start to end.

Renovations and repairs

Cracked render, blown plaster, damp patches, a chimney breast coming out. Small jobs and big ones, matched to what is already there.

The job

One house, start to finish

This semi-detached bungalow came to us with cold walls and a tired finish. Here is how it went, in the order it happened.

1

Boards on

The old wall is cleaned down and insulation boards are fixed across the whole outside. Every board is mechanically fixed and bonded, with the reveals, sills and eaves cut in around the windows and doors.

Grey insulation boards fixed across the front of a bungalow, materials stacked on the drive
2

Mesh and base coat

A reinforcing mesh goes into a base coat over the boards. This is the layer that stops cracking and takes the knocks, so it gets done slowly.

Insulation boards at a front corner with insulation sheets and buckets stacked ready
3

The finish

The final render goes on in the colour picked at the start, with white bands at the reveals. The drive is cleared, the sheeting comes up and the house is handed back.

A finished window with a crisp white reveal band on cream render

The same three stages, in the same order, on every insulation job we do.

Before and after

The difference it makes

The same bungalow finished in cream render with white reveals The front of a bungalow with grey insulation boards fixed and materials on the drive Before After

Same house, same hoop in the drive, a few weeks apart. Drag the handle to compare.

Why us

Why people ring us back

Tidy

Sheeting down before we start, everything swept and loaded at the end of the day. Your drive is your drive.

Straight

Reveals, corners and bands that are level when you sight down them. It is the detail people notice from the road.

Plain quotes

A price for the job, in writing, before we start. If something changes on site, you hear it from us first.

One crew

The people who quote the job are the people who do it. No subcontractors you have never met.

How it works

From a phone call to a finished wall

Ring or message

Call, WhatsApp or the form below. A few photos of the wall help.

We call out

We look at the job, measure up and talk through the options.

You get a price

In writing, with what is included spelled out.

We do the work

Booked in, done in one run, left clean.

Questions

The things people ask us

What is external wall insulation?
Insulation boards fixed to the outside of the house, covered with a reinforced base coat and finished in render. The walls stay warm on the inside, so the house holds its heat and the old cold spots and condensation go.
How long does a job take?
Skimming a room is usually a day or two. External insulation on a house is measured in weeks, depending on size and weather. We give you a timeline with the quote.
Do you work through the winter?
Inside work, yes. Outside render and insulation need the right temperature to cure, so winter jobs are planned around the forecast and we will tell you if a date has to move.
Can I stay in the house while you work?
Yes. Outside work does not come indoors. For inside plastering we sheet everything and work room by room.
What colours can the render be?
Most colours you can name, from white and cream through greys and stone shades. We bring samples so you see it on the wall, not on a screen.
Will the render crack?
A properly meshed base coat and the right finish are what stop cracking. That is why we do not rush the middle stage.
Is there a grant for insulation?
Ask when you ring. Grant rules change and depend on the house, so we would rather talk it through than put a promise on a web page.
How do I get a quote?
Ring 085 830 8394, send a WhatsApp with a few photos, or fill in the form below. There is no charge and no obligation.
About us

About Walsh Plastering & Construction

We are a plastering and construction crew working out of two vans, doing the walls of houses inside and out: skimming and plastering, dry lining, external rendering and insulation, and the plaster and render side of extensions and renovations.

The line on the side of the van is the one we work to.

The Walsh Plastering & Construction van One of the crew beside the small van on a gravel drive
Contact

Want a price on a job?

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Prefer to talk? Call 085 830 8394.

Call 085 830 8394