Oxfordshire · England
Lyneham New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for Lyneham, backed by a one-year guarantee. Ask us for a quote.
- Worktop and upstand sealant coming away
- Beads laid onto grit and dust from the build
- Joints pulling apart as timber shrinks
How we quote for new build mastic
Every job gets its own quote. This is what makes a difference:
- Whether old sealant or filler has to be cut out
- Whether the work is at height
- Working hours on commercial sites
- Mould in or behind the old joints
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- The type of property
- The problem you’ve noticed
- Where the property is
- Any access issues, like height or stairs
We do not publish a price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or drop us an email.
New build mastic in Lyneham
Our new-build work comes in two parts: plot mastic for developers, and putting right failed sealant for people who’ve bought a new home. Both get the same care over preparation, because that is what rushed new-build sealant usually lacks. Common call-outs are for leaking shower tray seals in a new home and gaps opening as the house dries out and settles, on windows & doors, bathrooms & en suites and show homes.
Around Lyneham, older homes often have timber floors that move through the year, which is why skirting and threshold joints need a flexible sealant, not filler.
Every job is covered by our 12-month guarantee.
- Where
- Lyneham (OX7)
- Wider area
- Oxfordshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Also near Lyneham
More services for Lyneham
Joints and finishes in Lyneham homes
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 Lyneham, as everywhere, new build mastic is only as good as the preparation behind it. For new homes near Shipton station, it’s worth checking the sealant early, while snags are still fresh.
Lyneham is about 8 miles north of Carterton, in Oxfordshire. Jobs in Lyneham get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. 443 places in Oxfordshire are on our list. For nearby work, see our Oxford page, about 18 miles away.
Postcode districts we cover here for new build mastic: OX7. We also cover Shipton-under-Wychwood (2 miles south), Ascott Earl (2 miles south-east), Ascott-under-Wychwood (2 miles south-east), Ascott d'Oyley (2 miles south-east) and Chilson (3 miles east). We also work in nearby towns such as Witney (8 miles south-east), Carterton (8 miles south), Kidlington (14 miles east), Chipping Norton (5 miles north-east), Woodstock (11 miles east) and Cogges (8 miles south-east).
Local landmarks in Lyneham
The closest station to Lyneham is Shipton station, roughly 1.1 miles south of the centre.
Lyneham: your questions answered
Do you cover smaller places like Lyneham?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you do new build mastic in Lyneham?
Yes, Lyneham is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
Do you take on second-fix sealing for builders?
Yes. We work through plots to your schedule, room by room. Tell us the plots and the joints involved and we will quote.
What do you need from me for a quote?
A short description and the location, with photos by email if possible. If we need more, we will ask.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Is there any odour?
Sometimes, a little. It fades as the sealant cures.
I rent my home. Can I book you?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Do you work for letting agents?
Yes, regularly. Several properties can go on one quote, and between tenancies is a good time for the work.
What sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- Structural cracks in walls or ceilings
- Baths and trays that move too much for sealant to cope with
- Deciding who is responsible under a builder’s warranty
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
Surfaces we seal
- Windows & doors
- Show homes
- Skirting & floors
- Plot handovers
- Bathrooms & en suites
- Kitchens
Surface by surface
Show homes
In a show home, the sealant is on display. Every bead is neat and coloured to suit the room.
Bathrooms and en suites
En suite seals are easy to miss on a snagging list until they leak. Resealing properly keeps water where it belongs.
What happens on the day
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. It usually takes anything from a few hours to several days, depending on the number of plots. Somewhere as small as Lyneham, access is often the only tricky part. 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.
- Failed or untidy sealant is cut out completely.
- Surfaces are cleaned of building dust and primed where needed.
- A sealant chosen for each area goes in and is tooled smooth.
- We check every joint and tell you how long each needs to cure.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any leaks or damp you’ve noticed
- On commercial sites, let us know about site rules
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Related advice
Why it’s worth doing now in Lyneham
A hairline gap at a skirting can wait, but water getting through can’t. Not sure whether yours can wait? You can phone 0345 464 0079 or email us with a few photos. Where a wall is exposed, as many are in small places like Lyneham, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or send us an email and we’ll talk you through it.
Why choose Mr Mastic in Lyneham
- A sealant colour to suit the surroundings
- We agree the colour with you first
- A choice of colours where the product allows
- Fully insured
Take a look at what affects the cost and what customers say.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Wipe joints with warm soapy water
- Resist patching a failed seal with a tube from the DIY shop
- Keep water off fresh sealant until it has cured
- Ventilate bathrooms well, especially in the first year
Photograph failed sealant before it’s redone and keep the builder’s replies. It’s useful if you need to raise other issues later.
Early snagging is easier snagging. Small faults turn into leaks if left in a busy bathroom.