Oxfordshire · England
New-build mastic & snagging in Long Wittenham, Oxfordshire
New build mastic for Long Wittenham and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Plot mastic for developers ahead of handover
- Shower seals failing in the first year or two
- Worktop and upstand sealant coming away
New build mastic around Long Wittenham
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 Long Wittenham, as everywhere, new build mastic is only as good as the preparation behind it.
Long Wittenham is about 3 miles north-east of Didcot, in Oxfordshire. Whether you are in the middle of Long Wittenham or further out, we cover new build mastic for every kind of property. Long Wittenham is one of 443 places in Oxfordshire where we work for new build mastic. There’s also a page for Oxford, about 8 miles away.
All of OX14 is covered for new build mastic, from the main roads to the quietest streets. Streets in the area include High Street, Didcot Road and Wessex Way, and we cover them all. Close by, we work in Clifton Hampden (1 mile north), Appleford-on-Thames (1 mile west), Culham (2 miles north-west), Didcot (3 miles south-west) and Sutton Courtenay (3 miles west). Within a short drive, we also cover Oxford (8 miles north), Abingdon-on-Thames (4 miles north-west), Thame (13 miles north-east), Wantage (10 miles west), Henley-on-Thames (15 miles south-east) and Grove (9 miles west).
Near you in Long Wittenham
Typical jobs here are in homes near The Plough Public House. For rail, the closest station is Appleford station, roughly 1.3 miles west of the centre. Nearby you’ll also find Brightwell Castle (2.6 miles south-east) and Pendon Museum (less than half a mile west). Not far away are Wittenham Clumps and Mowbray Fields.
New build mastic in Long Wittenham
Dust is the enemy of new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the sealant actually sticks instead of bonding to the dust. We work on kitchens, windows & doors and show homes, and common reasons people get in touch are internal frame sealant that has split and beads laid onto grit and dust from the build.
For a small place like Long Wittenham, the journey and access are planned in advance, and once on site, the job is the same as anywhere.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Long Wittenham (OX14)
- Wider area
- Oxfordshire
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How the job changes by surface
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. We reseal it with a weatherproof, flexible sealant.
FAQs for Long Wittenham
Do you cover smaller places like Long Wittenham?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
I let a flat near Appleford station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Can new sealant go on top of the old bead?
No. We always remove the existing bead, the joint cleaned and primed where needed, and a new bead applied.
Are you fully insured?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
Do you remove the old sealant?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
What colour sealant will you use?
That depends on what the joint meets: white or clear for most sanitary joints, colours for worktops, floors and frames. We agree the colour before any work starts.
Is the work guaranteed?
Yes, always. There’s a 12-month guarantee on every job, large or small.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
The process
We work through the job in order: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a few hours in a single home. For a village or hamlet like Long Wittenham, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We go through the snagging list or plot schedule and agree the joints to do.
- The old bead comes out in full, with no layer left behind.
- Surfaces are cleaned of building dust and primed where needed.
- We apply a sealant that suits each joint and tool it to a neat finish.
- We check every joint and tell you how long each needs to cure.
Getting ready for the visit
- Tell us if parking is tricky
- Tell us about any water getting in
- Move anything stored near the joints
Getting a quote
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Related advice
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Follow the cure time we give you
- Watch for new gaps as the house dries out
- Ventilate bathrooms well, especially in the first year
- Put sealant faults on your snagging list early
Do not stand on the bath edge or the lip of the tray. Report any movement in a bath or tray.
Leave a failed new-build seal and water can reach the floor and the ceiling below. Early resealing keeps the job small and protects the rest of the house.
What affects the quote in Long Wittenham
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The number of rooms or windows
- How easy the joints are to reach
- Mould in or behind the old joints
- The size of the job
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or drop us an email.
What to tell us for a quote
When you contact us, it’s useful to know:
- What’s wrong with the joints now
- Roughly how big the job is
- How we’d reach the joints
- Where the job is, and your postcode
For a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. You’ll have a clear quote before work begins.
Places near Long Wittenham
Also in Long Wittenham
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
A DIY attempt does not rule out a professional job. We cut it out and start again.
Leave it or put it right?
If you’re still in the builder’s snagging or warranty period, ask them to put it right first. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. Older cottages and farmhouses around Long Wittenham can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Doing several joints on one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why Long Wittenham customers choose us
- Sanitary silicone with an anti-fungal additive in wet areas
- Experience in homes, commercial sites and hotels
- We never seal over old sealant
- Every job guaranteed for a year
See our cost guide and our reviews.
Common problems we fix in Long Wittenham
New homes are full of moisture from plaster, screed and concrete, which takes a year or two to dry out. Drying timber shrinks and pulls joints apart, and sealant that cannot keep up splits.
These are the problems we are asked about most:
- Internal frame sealant that has split
- Second-fix sealing on new plots
- Skirting joints opening in the first winter
- Joints pulling apart as timber shrinks
For new homes near Appleford station, it’s worth checking the sealant early, while snags are still fresh.
Questions to ask before booking
- How the joint is cleaned and prepared
- Whether they seal over old material or remove it
- What guarantee comes with the work
- When the joint can take water or movement