Oxfordshire · England
Great Coxwell New Build Mastic
New build mastic for Great Coxwell and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Beads laid onto grit and dust from the build
- Smeared, uneven beads picked up at snagging
- Leaking shower tray seals in a new home
DIY versus a professional finish
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
How we handle new build mastic in Great Coxwell
A new build should have a neat, sound bead at every joint. Smeared, patchy or cracked sealant is worth sorting early, before water gets into the floor or walls. If you have gaps behind new kitchen upstands and internal frame sealant that has split, we can put it right.
Somewhere as small as Great Coxwell, new homes tend to be conversions, self-builds or a few houses rather than an estate. Every one needs its sealant and floor joints done properly, whatever the size of the site.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Location
- Great Coxwell (SN7)
- Wider area
- Oxfordshire
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Also near Great Coxwell
Other services in Great Coxwell
How we quote for new build mastic
We do not publish a price list, because jobs vary so much. The quote depends on:
- The number of rooms or windows
- The size of the job
- Which sealant suits the joint
- Any mould that needs treating
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- The rough size of the job
- Any previous sealing or DIY work
- The problem you’ve noticed
- Where the property is
Getting a quote is simple: tell us what needs doing and where and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
Aftercare tips
Good habits help new joints last longer. Our tips:
- Keep pictures and emails about snagging items
- Keep water off fresh sealant until it has cured
- Ventilate bathrooms well, especially in the first year
- Clean sealant with mild detergent, not abrasives
Keep photos of the joints and any snagging correspondence with your builder. It’s useful if you need to raise other issues later.
A seal that splits early is often a sign of movement. Getting it resealed properly, and any movement checked, stops it recurring.
Why deal with it now?
A hairline gap at a skirting can wait, but water getting through cannot. Not sure whether yours can wait? You can phone 0345 464 0079 or drop us an email with a few photos and we will tell you. Around Great Coxwell, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why Great Coxwell clients choose us
- Homes, businesses and hotels
- You choose the colour before work begins
- Colour picked to suit the job
- 4.9 on Google from 180+ five-star reviews
Take a look at how sealant jobs are priced or our reviews.
How it works
There is not much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes anything from a few hours to several days, depending on the number of plots, including the tidy-up. Somewhere as small as Great Coxwell, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked for movement before we start.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- The finished joints are checked and the cure times given.
How to prepare
- Move anything stored near the joints
- Plan for the work area to be out of bounds to pets and children
- Mention any parking rules near the property
How to get a quote
There’s no standard price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, ring 0345 464 0079 or email us.
Advice
Different surfaces, different methods
Kitchens
As a new house dries, worktops and walls shift a little, which opens gaps along the back. We reseal them with a flexible sealant.
Plot handovers
Taking time over preparation reduces return visits. Dust from the build is removed first.
Great Coxwell: your questions answered
Is Great Coxwell in your area for new build mastic?
Yes. We work across London and the South East, and Great Coxwell is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing, and we will send you a clear quote.
Is Great Coxwell within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Where do you work from?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Can landlords and businesses book you?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels across Oxfordshire.
Should I try DIY first?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Are you fully insured?
Yes. We’re fully insured, and we’ve been doing sealant work for more than 20 years.
Can tenants book the work?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Will you just run a new bead over the existing one?
No. New silicone won’t bond to old silicone, so it soon lifts and traps water. The old sealant always comes out first.
What new build mastic looks like in Great Coxwell
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Around Great Coxwell, as everywhere, new build mastic is only as good as the preparation behind it. For jobs in and around Great Coxwell, choosing the right material for each joint is as important as a tidy finish.
Great Coxwell is in Oxfordshire. We carry out new build mastic for homes and businesses in Great Coxwell and nearby, as part of our work across Oxfordshire. Our area takes in 443 places across Oxfordshire, large and small. We also work in Oxford, about 18 miles from Great Coxwell.
Here we cover the SN7 postcode area for new build mastic. If you need new build mastic at a property on Dark Lane, The Hollow Road and The Holloway Road or anywhere close by, our applicators can take on the job. Other places close to Great Coxwell include Little Coxwell (1 mile east), Faringdon (1 mile north-east), Longcot (2 miles south) and Fernham (2 miles south-east). We also work in nearby towns such as Abingdon-on-Thames (14 miles east), Witney (11 miles north-east), Carterton (9 miles north), Wantage (9 miles south-east), Grove (8 miles east) and Charlton (9 miles east).
Around Great Coxwell
Typical jobs here are in homes near Eagle Tavern. Other landmarks nearby include Faringdon Castle (2.1 miles north-east) and Faringdon Museum (1.7 miles north-east). Not far away are Badbury Hill.
Honest limits
To be straight with you, some problems need a different trade:
- Disputes or warranty claims with your builder
- A tray or bath that isn’t properly supported, until it’s fixed
- Cracking that points to a structural problem
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before you book.
Where we work in Great Coxwell
- Kitchens
- Skirting & floors
- Bathrooms & en suites
- Show homes
- Windows & doors
- Plot handovers