Oxfordshire · England
Ascott-under-Wychwood New Build Mastic
New build mastic across Ascott-under-Wychwood and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Plot mastic for developers ahead of handover
- Gaps opening as the house dries out and settles
- Messy sealant that spoils new finishes
New build mastic for homes and businesses in Ascott-under-Wychwood
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 since hurried prep is behind a lot of new-build failures. If you’re dealing with new-build shower sealant that has already split and untidy sealant flagged on a snagging list, we can put it right.
Work in a small place like Ascott-under-Wychwood just needs the journey and access planning, and the work itself is the same as on any site.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Ascott-under-Wychwood (OX7)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Different surfaces, different methods
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Each joint is cleaned and primed where needed to keep callbacks down.
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. A proper reseal keeps water in the tray.
Looking after it afterwards
So the new joints stay in good condition:
- Ventilate bathrooms well, especially in the first year
- Resist patching a failed seal with a tube from the DIY shop
- Check bath and shower seals every few months as the house settles
- Keep water off fresh sealant until it has cured
Follow the cure time we give you before the area gets wet. Silicone is usually left for about a day to cure enough for use.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Early resealing keeps the job small and protects the rest of the house.
How it works
All our tools and materials come with us in the van. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for most snagging lists, longer for a run of plots. For a village or hamlet like Ascott-under-Wychwood, 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.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out down to clean surfaces.
- We clean out the dust and grit left from the build.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
How to prepare
- Tell us if parking is tricky
- Mention if the joints have been sealed before
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Related advice
Common questions in Ascott-under-Wychwood
Is Ascott-under-Wychwood within the area you cover?
Yes. Ascott-under-Wychwood is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Ascott-under-Wychwood in your area for new build mastic?
Yes. Our work covers London and the South East, and Ascott-under-Wychwood is part of that. Just call 0345 464 0079 or email us with a few details of the job.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Can landlords and businesses book you?
Yes. We work for householders, landlords, letting agents, businesses and hotels in Ascott-under-Wychwood.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you when we finish.
Where is Mr Mastic based?
Our base is Crawley. We work across South East England, London and Scotland.
Do you have insurance?
Yes. We’re fully insured.
New homes and floors in Ascott-under-Wychwood
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you’ve bought a new home near Ascott-Under-Wychwood station, the sealant around baths, showers and frames is worth checking in the first year or two. Around Ascott-under-Wychwood, as everywhere, new build mastic is only as good as the preparation behind it.
Ascott-under-Wychwood is about 6 miles north-west of Witney, in Oxfordshire. Ascott-under-Wychwood gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Ascott-under-Wychwood is one of 443 places in Oxfordshire where we work for new build mastic. Oxford is on our list too, around 16 miles away.
Jobs for new build mastic in OX7 works the same way as everywhere else we cover. New build mastic is available to properties on High Street, The Green and Church Close and the roads around them. We also cover the places around Ascott-under-Wychwood: Ascott Earl (1 mile west), Ascott d'Oyley (1 mile south-east), Chilson (1 mile north-east), Shipton-under-Wychwood (1 mile west) and Lyneham (2 miles north-west). Within a short drive, we also cover Witney (6 miles south-east), Carterton (7 miles south), Faringdon (15 miles south), Kidlington (12 miles east), Chipping Norton (5 miles north) and St John Street area (15 miles south-east).
Local landmarks in Ascott-under-Wychwood
Ascott-under-Wychwood has its own railway station: Ascott-Under-Wychwood station. Not far away are Blenheim Farm.
Work for landlords, hotels and businesses
Landlords and letting agents in Ascott-under-Wychwood can book us as well as householders. Sealant work between tenants keeps a property looking cared for.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
When it isn’t the sealant
In fairness, some problems need a different trade:
- Leaking fittings rather than failed sealant
- Broken tiles or a split tray
- Deciding who is responsible under a builder’s warranty
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Skirting & floors
- Kitchens
- Bathrooms & en suites
- Show homes
- Windows & doors
- Plot handovers
Why deal with it now?
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Dealing with it early keeps the damage away from ceilings, floors and finishes. Where a wall is exposed, as many are in small places like Ascott-under-Wychwood, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
Why Ascott-under-Wychwood customers choose us
- Domestic, commercial and hotel work
- More than 20 years in sealant work
- Old sealant always removed completely
- ARBOMaster approved applicator
Read our cost guide or what customers say.
Nearby places to Ascott-under-Wychwood
Also in Ascott-under-Wychwood
Quotes for new build mastic in Ascott-under-Wychwood
For a quick quote, just ask. The main things that affect it are:
- How easy the joints are to reach
- Any mould that needs treating
- The number of rooms or windows
- The number and length of the joints
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Call for a quick quote and we’ll explain what it covers.
Asking for a quote
Before you ask for a quote, have a think about:
- Pictures of the joints, sent by email
- Access, such as stairs, a lift or height
- Any previous sealing or DIY work
- The type of property
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before we start.