Surrey · England
Sunbury-on-Thames New Build Mastic
New build mastic for Sunbury-on-Thames and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Shower seals failing in the first year or two
- Sealant work across a run of new homes
- Worktop and upstand sealant coming away
What sealant work cannot fix
Before booking, it’s worth knowing the limits:
- Leaks from pipes, valves or wastes, which need a plumber
- Damaged fittings that need replacing
- Movement caused by a poorly fitted tray or bath
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Sunbury-on-Thames
- Skirting & floors
- Windows & doors
- Plot handovers
- Bathrooms & en suites
- Kitchens
- Show homes
New build mastic in Sunbury-on-Thames
We work in new homes and on new-build sites across Sunbury-on-Thames. Whether it’s one en suite or a run of plots, the method is the same: remove, clean, prime where needed, then a neat new bead. Typical jobs include sealant work across a run of new homes and kitchen sealant that has pulled off the wall, on show homes, bathrooms & en suites and plot handovers.
Small business units and shops in a town like Sunbury-on-Thames have floors that take heavy wear. Joints at thresholds and in tiled or concrete floors need resealing before the edges start to break up.
There’s a 12-month guarantee on every job, large or small.
- Where
- Sunbury-on-Thames (TW16)
- Wider area
- Surrey
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of new build mastic
Jobs vary more than people expect. What affects the quote:
- The old material and how stubborn it is
- Access and height
- Any working-time requirements on site
- How much there is to do
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Where the property is
- The rough size of the job
- If someone has resealed it before
- A few photos by email, if you can
For new build mastic in Sunbury-on-Thames, ring 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before work begins.
Signs you need new build mastic in Sunbury-on-Thames
Baths and trays settle under load once the home is lived in. A bath sealed empty drops slightly when filled, straining the joint.
The most common problems we see are:
- Gaps behind new kitchen upstands
- New-build shower sealant that has already split
- Joints pulling apart as timber shrinks
- Skirting joints opening in the first winter
For new homes near Sunbury station, it’s worth checking the sealant early, while snags are still fresh.
Questions to ask before you book
- What product goes in the joint
- Are they insured?
- Which colour the sealant will be
- How the surfaces are prepared before sealing
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Don’t wait for the house to settle if water is getting through
- Wait for the cure time before using a resealed shower
- Avoid running a DIY bead over the old one
- Keep pictures and emails about snagging items
Follow the cure time we give you before the area gets wet. Silicone is generally left for about a day before water reaches them.
Lifting sealant traps moisture and mould behind it. Resealing before mould gets in saves a harder job later.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
How the visit works
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take a few hours in a single home. In Sunbury-on-Thames, parking is rarely complicated, though it helps to know about driveways or restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out, with no layer left behind.
- Joints are vacuumed and cleaned of building dust.
- We prime where needed and apply a sealant suited to each joint.
- We tool every joint neatly and tell you when each area can be used.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
- Let us know about stairs, lifts or work at height
Get a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Advice
Landlords, agents and businesses in Sunbury-on-Thames
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Sunbury-on-Thames questions
Can you help a landlord with a rental near Sunbury station?
Yes. We work for landlords and agents as well as householders. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear quote.
Is new build mastic in Sunbury-on-Thames guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Do you work in Sunbury-on-Thames?
Yes. We cover Sunbury-on-Thames. For a quote, ring 0345 464 0079 or send us an email.
Do you take on second-fix sealing for builders?
Yes. Plot mastic and second-fix sealing for developers is part of our work. Send us the plot schedule and we will quote.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
My new home is still under warranty. Should I contact you?
Start with your builder while their snagging or warranty period runs. After that, or if their repair keeps failing, we can do it with our one-year guarantee.
Should I wait before resealing?
Where water is getting through, don’t wait. Hairline cosmetic gaps can wait until the house has settled.
Also near Sunbury-on-Thames
Also in Sunbury-on-Thames
New build mastic in Sunbury-on-Thames: local notes
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around Sunbury-on-Thames, as everywhere, new build mastic is only as good as the preparation behind it.
Sunbury-on-Thames is about 7 miles south of Hayes, in Surrey. If you need new build mastic in Sunbury-on-Thames, please call 0345 464 0079 or send us an email for a quick quote. We cover Surrey from our Crawley base. 395 places in Surrey are on our list, large and small. London is on our list too, about 15 miles from Sunbury-on-Thames.
Jobs for new build mastic in TW16 works the same way as everywhere else we cover. New build mastic is available to properties on Station Road, The Ridings and Ravenscourt. You will find Sunbury-on-Thames on the A244 and A308, which makes it straightforward to reach with everything needed for new build mastic. Neighbouring places we cover for new build mastic include Upper Halliford (1 mile south-west), Charlton (1 mile west), Ashford Common (1 mile north-west), Hounslow (1 mile north) and Littleton Common (1 mile west). Within a short drive, we also cover Guildford (13 miles south-west), Woking (10 miles south-west), Camberley (15 miles south-west), Epsom (8 miles south-east), Ewell (8 miles south-east) and Egham (6 miles west).
Around Sunbury-on-Thames
In Sunbury-on-Thames, that means homes and buildings near Sunbury Manor School, The Three Fishes Public House and Sunbury Park and the streets around them. There’s a railway station in Sunbury-on-Thames itself: Sunbury station. Well-known places in the area include Kempton Steam Museum (1 mile north-east) and No. 2 New Zealand General Hospital (2 miles south). The countryside around Sunbury-on-Thames includes St Ann's Hill and Kempton Park Reservoirs.