Oxfordshire · England
New Build Mastic in Nuneham Courtenay
Our applicators work in Nuneham Courtenay on plot mastic for developers and snagging failed sealant in new homes. Old material cut out, joints cleaned and sealed neatly.
- Kitchen sealant that has pulled off the wall
- Internal frame sealant that has split
- Smeared, uneven beads picked up at snagging
Looking after it afterwards
So the new joints stay in good condition:
- Wipe joints with warm soapy water
- Resist patching a failed seal with a tube from the DIY shop
- Get a leaking seal dealt with right away
- Check bath and shower seals every few months as the house settles
Ventilation matters in a new home, which is still drying out. Run the fan or open a window after bathing to help keep mould away.
Don’t let the snagging period run out with sealant problems unreported. Once it ends, the repair may be down to you.
New build mastic in Nuneham Courtenay, done properly
A new house keeps drying out and settling for its first couple of years. Timber dries and shrinks, and baths and trays settle, and sealant applied in a hurry at handover can split. If you have plot mastic for developers ahead of handover and internal frame sealant that has split, we can put it right.
Around Nuneham Courtenay, older homes often have timber floors that move through the year, which is why skirting and threshold joints need a flexible sealant, not filler.
Our work is backed for twelve months, in Nuneham Courtenay and everywhere else we cover.
- Place
- Nuneham Courtenay (OX44)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Nuneham Courtenay questions
Is Nuneham Courtenay within the area you cover?
Yes. Nuneham Courtenay is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Radley station. Can you help?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Do you work through snagging lists?
Yes. Snagging lists are a common starting point for us. We will go through the sealant items and agree what we’ll do.
Is it worth resealing while the house is still settling?
It depends on whether water is getting through. A leaking shower or bath seal should be redone straight away, while small cosmetic gaps can wait a while.
Can you reseal over the builder’s sealant?
No. We always remove the existing bead, the joint cleaned and primed where needed, before resealing.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done.
When is the sealant fully cured?
It depends on the product and the temperature. Before we leave, we’ll tell you the cure time.
Are you fully insured?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
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.
What new build mastic looks like in Nuneham Courtenay
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In and around Nuneham Courtenay, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint. If you’ve bought a new home near Radley station, the sealant around baths, showers and frames is worth checking in the first year or two.
Nuneham Courtenay is about 4 miles east of Abingdon-on-Thames, in Oxfordshire. Whether you are in the middle of Nuneham Courtenay or further out, we cover new build mastic for every kind of property, from flats and houses to offices and hotels. Our area takes in 443 places across Oxfordshire, from the larger towns to small villages.
Our applicators cover all of the OX44 postcode area for new build mastic. We also cover the places around Nuneham Courtenay: Radley (2 miles west), Clifton Hampden (2 miles south), Long Wittenham (3 miles south), Abingdon-on-Thames (4 miles west) and Culham (4 miles south-west). Further out, we also cover Oxford (4 miles north), Didcot (6 miles south), Bicester (15 miles north), Witney (14 miles north-west), Thame (11 miles east) and Wantage (12 miles south-west).
Near you in Nuneham Courtenay
Locally, jobs take us to homes and businesses close to The Oxford Academy, among other places. The nearest railway station is Radley station, roughly 1.7 miles west of the centre. A little further out are FitzHarris Castle (3.7 miles west) and Littlemore Hospital (2.3 miles north-west). For a walk, there’s Shotover and Wells Farm.
Why deal with it now?
It often makes sense to do all the sealant items on a snagging list together. You get one visit and one clear quote to plan around. In a small place like Nuneham Courtenay, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email and we will talk you through it.
Why us?
- Fully insured
- Colour agreed with you before we start
- Anti-fungal sanitary silicone in wet areas
- Arbo and Everbuild products
Read how sealant jobs are priced and customer reviews.
How it works
The work is kept neat and contained to the joints we’re treating, so you can get on with your day. Expect the work to take anything from a few hours to several days, depending on the number of plots, and we tell you how long to leave it before we go. In a small place like Nuneham Courtenay, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we work through your snagging list or plot schedule with you.
- We cut out every bit of the failed or messy sealant.
- We clean off dust from the build and prime the surfaces where the product needs it.
- New sealant suited to each joint is applied and tooled neatly.
- We check every joint and tell you how long each needs to cure.
How to prepare
- Mention if the joints have been sealed before
- Try not to wet indoor joints just before the visit
- Mention any parking rules near the property
Get a quote
We quote each job on its own. Simply ring 0345 464 0079 or drop us an email and describe the job, and photos are welcome.
Advice
Surface by surface
Windows and doors
A draught at a new window can be a missed or failed joint. We check and reseal the frame edges.
Kitchens
Sink joints are wet all the time. A kitchen sealant goes in there, food-safe where it’s needed.
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Broken tiles or a split tray
- Your warranty claim itself, which is between you and the builder
- Leaks from pipes, valves or wastes, which need a plumber
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
Joints and surfaces we work on
- Skirting & floors
- Windows & doors
- Plot handovers
- Show homes
- Kitchens
- Bathrooms & en suites
Also near Nuneham Courtenay
What else we do in Nuneham Courtenay
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.