Windsor and Maidenhead · England
New-build mastic & snagging in Sunninghill, Windsor and Maidenhead
Plot mastic for developers and snagging failed sealant in new homes for Sunninghill, backed by a one-year guarantee. Ask us for a quote.
- Skirting joints opening in the first winter
- Frame joints opening as the plaster dries
- Sealant that never bonded to the surface
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
About our new build mastic in Sunninghill
New homes move as they dry out. Timber shrinks, plaster dries and baths and trays bed down, and sealant applied in a hurry at handover can split. Common call-outs are for frame joints opening as the plaster dries and messy sealant that spoils new finishes, across skirting & floors, show homes and bathrooms & en suites.
For a new home in or near Sunninghill, it’s worth checking the sealant early. Gaps at skirtings, shower seals pulling away and missing mastic around frames are common snags.
There’s a 12-month guarantee on every job.
- Place
- Sunninghill (SL5)
- Wider area
- Windsor and Maidenhead
- Cover
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Different surfaces, different methods
Kitchens
Worktops in new homes can move slightly as the house dries, which opens gaps along the back. We reseal them with a flexible sealant.
Plot handovers
Good preparation at handover saves snagging later. We clean out building dust before sealing and primer used where needed.
Nearby places to Sunninghill
What else we do in Sunninghill
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Get a leaking seal dealt with straight away
- Put sealant faults on your snagging list early
- Wait for the cure time before using a resealed shower
- Photograph failed sealant before it’s redone
Follow the cure time we give you before the area gets wet. Silicone is normally left for about a day.
If a shower tray or bath seal splits in the first year, look for movement. Have it resealed, and the tray or bath checked, before it gets worse.
Joints and finishes in Sunninghill homes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you’ve bought a new home near Ascot station, the sealant around baths, showers and frames is worth checking in the first year or two.
Sunninghill is about 4 miles east of Bracknell, in Windsor and Maidenhead. From the centre of Sunninghill to the outskirts, new build mastic is available for homes and businesses alike. Sunninghill is one of 57 towns and villages in Windsor and Maidenhead we cover for new build mastic. There’s also a page for Reading, about 14 miles away.
Work in SL5 is quoted and booked the same way as anywhere else. If you need new build mastic at a property on High Street, London Road and School Road or a nearby road, our applicators can take on the job. We also cover the places around Sunninghill: Ascot (1 mile north-west), Beggar's Bush (1 mile east), Cheapside (1 mile north), Blacknest (1 mile east) and North Ascot (2 miles north-west). Larger places within reach include Maidenhead (9 miles north), Windsor (5 miles north), Boyn Hill (8 miles north-west), Cookham (11 miles north), Furze Platt (10 miles north) and Dedworth (5 miles north).
Near you in Sunninghill
Typical jobs here are in homes near St Mary's School, Charters School and Silwood Park. The closest station to Sunninghill is Ascot station, roughly 1 mile west of the centre. Other landmarks nearby include Heatherwood Hospital (1.5 miles north-west). The countryside around Sunninghill includes Virginia Water Lake and Gracious Pond.
Leave it or put it right?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it will not bond to the old layer. Taking it all out and starting again is the only way to get a lasting seal. Around Sunninghill, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- ARBOMaster approved applicator
- More than 20 years in sealant work
- Anti-fungal silicone where joints get wet
- White, clear, grey or coloured to suit, where the product allows
Take a look at our cost guide and our reviews.
Signs you need new build mastic in Sunninghill
New homes are full of moisture from plaster, screed and concrete, which takes a year or two to dry out. As it does, timber shrinks and joints open and the sealant has to cope with the movement.
If you can see any of these, it’s time to have the joints looked at:
- Cracked caulk along new skirting
- Sealant work across a run of new homes
- Leaking shower tray seals in a new home
- Gaps behind new kitchen upstands
In and around Sunninghill, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Before you book anyone
- What the quote includes, VAT included or not
- What preparation is included
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
Common questions in Sunninghill
Can you do new build mastic in Sunninghill?
Yes. Our work covers London and the South East, and Sunninghill is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
I let a flat near Ascot station. Can you help?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear quote.
Will the old sealant be removed?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Are you insured?
Yes. We’re fully insured for every job we do.
What should I tell you?
Just the basics: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or send us an email.
Will there be a smell?
Some sealants have a smell while they cure. Ventilation helps.
Do you work through snagging lists?
Yes. Send us the sealant items on the list, with pictures if you can. We’ll flag anything that needs another trade.
Why has my new-build shower seal failed already?
There are usually two causes: the house moving as it dries, and sealant that never bonded properly. A proper reseal deals with both.
What we do, step by step
When we arrive, we look over the joints with you first. We protect the surfaces around the joints before any work begins. The work usually takes a few hours for most snagging lists, longer for a run of plots. A visit to Sunninghill is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out down to clean surfaces.
- We clean out the dust and grit left from the build.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
- Keep pets and children clear of the area while we work
How to get a quote
Asking for a quote is easy: let us know what needs doing and where. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Advice
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can go on one quote.