Plasterboard Painting in Cambridge

Cambridge Decorators provide plasterboard painting across new builds, extensions, and loft conversions throughout Cambridge and the surrounding villages.

Freshly plastered walls and ceilings: sealing coat, build-up, and finish
Sealing coat application: correct dilution, full coverage, no missed patches
First and second fix decoration on new builds and extensions
Plaster repair and preparation: cracks, taping, scrim at board junctions
New build personalisation: moving beyond the developer magnolia standard

Fresh plasterboard is common across Cambridge’s growing stock of extensions and new-build developments. Trumpington Meadows, CB1 apartments, kitchen extensions in Histon, loft rooms in Romsey. Every one of these surfaces needs careful treatment before a standard emulsion will adhere and perform correctly.

Call 01223 912776 for a free quote.

Get My Free Quote

Fill in the form below for a free quote:

This form has been deleted or is unavailable.

Why Choose Cambridge Decorators

New Build Ready

Sealing coats and primer systems for even absorption on new plaster.

Clear Pricing

Fixed price from the first quote with no unexpected additions.

Fully Insured

Full public liability cover on every job.

Highly Recommended

Most of our work comes from repeat clients and referrals.

Get My Free Quote

Speak to a local decorator today

01223 912776

Contact Form

Plasterboard Painting Services

Freshly Plastered Walls

New plaster is highly porous and alkaline. Applying standard emulsion directly to fresh plaster causes the paint to pull, peel, and dry unevenly — the plaster draws liquid out of the paint too quickly before it can form a proper film.

We assess plaster moisture levels before starting. Pink plaster that has not fully dried is not ready to coat. Cambridge extensions and loft rooms are often completed in autumn or winter when drying times extend.

Once the plaster is fully cured to an even pale colour, we apply a sealing coat followed by two finish coats. This is the correct system for any freshly plastered surface.

Sealing Coat Application

A sealing coat is diluted emulsion applied as a thin, penetrating first coat to freshly plastered walls and ceilings. It seals the surface, reduces suction, and creates a stable base for the finish coats.

Getting the dilution right matters. Too little water and the sealing coat does not penetrate adequately. Too much water and it runs, patches, and leaves an uneven base. We use a 70:30 emulsion-to-water ratio as a starting point and adjust for the porosity of the specific plaster.

Application coverage is checked carefully. Missed areas and thin patches become visible through the finish coats as high-suction spots with a different sheen. We do not rush the sealing coat.

First and Second Fix

New build and extension decoration typically runs in two phases. First fix happens before skirting boards, architraves, and kitchen units are installed. Second fix follows installation: skirtings, doors, frames, and any exposed joinery are painted as a final stage.

We coordinate with builders and project managers on Cambridge extension projects. Biotech and university professional households in Trumpington and Histon run tight extension schedules. We confirm dates and stick to them.

The sequence matters: painting walls before units and skirtings go in avoids the masking and cutting-in work that comes from doing it the other way around. We advise on the correct phasing at the outset.

Freshly plastered walls being painted in Cambridge, interior room grey finish by Cambridge Decorators

New Builds and Plaster Repairs

Interior room with white wardrobe painted by Cambridge Decorators, new build extension finish

New Build and Extension

Cambridge new builds in Trumpington Meadows, CB1, and Sawston are typically handed over in a standard white or magnolia developer finish. Most buyers want something different: specific colours, feature walls, or a higher quality application than the developer’s finish team provides.

We repaint new builds shortly after completion, once the initial plaster has fully cured. We apply a full sealing coat system to any areas of fresh plaster and use a quality emulsion throughout.

Plaster Repair and Preparation

Extensions and loft conversions often combine new surfaces with repaired areas of existing plaster, patched holes, and scrim-taped board junctions. These transitions are where painting problems begin if preparation is not done properly.

Scrim tape at board joints must be properly embedded in plaster or jointing compound before painting. A raised joint line visible through the finished coat is one of the most common complaints on Cambridge extension projects.

We check all board junctions, patch any imperfections in the finish, and ensure transition areas between old and new plaster are level and stable before any coating begins.

Working with Your Build Team

We coordinate directly with builders and project managers on Cambridge extension and new build projects. Tight schedules are common — we confirm dates, stick to them, and advise on the correct phasing so decoration fits around the construction programme without delays.

As part of our interior painting service, we cover all painted surfaces in new builds and extensions. For ceiling-specific work alongside plasterboard projects, see our ceiling painting and wall painters pages.

How It Works

1. Assessment

We check the plaster for moisture, alkalinity, and surface condition. We identify any board junctions, scrim lines, or patched areas that need additional preparation.

2. Repair

Any surface imperfections, raised joints, or unstable areas are addressed before the sealing coat. A small repair done now prevents a large visible problem after finishing.

3. Sealing Coat

Diluted emulsion is applied across all freshly plastered areas. We confirm even coverage, no missed patches, and full surface penetration before moving on.

4. First Finish Coat

Full-strength emulsion is applied once the sealing coat is fully dry. We check for suction variation and re-apply where needed before the second coat.

5. Second Coat and Joinery

The final emulsion coat is followed by woodwork painting if in scope. Skirtings, architraves, and door frames are painted as second fix after units and floor coverings are in place.

6. Handover

We walk through the completed work with the owner, confirm all surfaces are at the specified finish standard, and note any areas for a final touch-up before sign-off.

Get My Free Quote

Get a free quote for your Cambridge project

01223 912776

Contact Form

Plasterboard Painting Costs in Cambridge

Prices below are estimates. Call 01223 912776 for a precise quote.

Drying Stage

Plaster that is not fully cured cannot be coated on the planned date. If a rebook is required due to wet plaster, this adds mobilisation cost. Confirmed drying time at booking stage avoids this.

Scope of Joinery

Second fix decoration covering skirtings, architraves, and doors throughout an extension adds significant time on top of wall and ceiling painting.

Existing Plaster Repairs

Extensions that tie into existing rooms often require patching and blending across old and new plaster. This transition work takes longer than painting a clean new room.

Cambridge decorator applying plaster during a painting and decorating project, Cambridge Decorators

Plasterboard Painting FAQs

What is a sealing coat and do you always need one?

A sealing coat is diluted emulsion applied as the first coat on freshly plastered walls. It is needed on any new plaster because standard emulsion dries too fast on the porous surface and does not adhere properly. You always need a sealing coat on new plaster — skipping it is the most common cause of peeling paint on Cambridge extensions.

How long does new plaster need to dry before painting?

Fresh plaster typically needs four to six weeks to fully cure under normal conditions. In Cambridge’s autumn and winter months, with lower temperatures and higher humidity, this can extend to eight weeks or more. We check moisture levels with a damp meter rather than guessing by appearance.

Can you match the colour of the existing rooms to the new extension?

Yes. We bring the existing emulsion details to the property or take a colour chip reading where the original paint brand is unknown. Blending new and existing rooms is straightforward where the existing walls are in reasonable condition. We flag if re-coating the adjacent rooms is needed for a clean match.

Do you handle first and second fix on Cambridge new builds?

Yes. We work directly with builders and project managers at both stages. First fix is completed before skirtings and units are installed. Second fix covers all joinery once the fit-out is complete. We confirm the phasing at the initial survey so the schedule is clear from the start.

What paint do you recommend for new build walls?

For surfaces in new Cambridge builds, we use a high-quality breathable emulsion in the specified finish. We avoid cheap contract emulsions — on a new build in Trumpington or CB1, the owner wants a finish that holds its appearance for several years.

Do you repair plasterboard damage before painting?

Yes. Screw holes, dents, and imperfect board joints are filled and sanded before any paint goes on. Raised scrim lines at board junctions are flattened back. We do not paint over surface defects and leave the problem for the homeowner to discover under the new coat.

Get My Free Quote

Fill in the form below for a free quote:

This form has been deleted or is unavailable.