Oxfordshire · England
New Build Mastic in Steeple Aston
New build mastic across Steeple Aston and nearby, with every bit of old sealant taken out first.
- Messy sealant that spoils new finishes
- Cracked caulk along new skirting
- Joints pulling apart as timber shrinks
How we handle new build mastic in Steeple Aston
Building dust is behind a lot of failed new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the new bead bonds properly instead of bonding to the dust. We work on kitchens, windows & doors and plot handovers, and common reasons people get in touch are new-build shower sealant that has already split and second-fix sealing on new plots.
Older homes in small places like Steeple Aston often have timber floors that move with the seasons, which is why skirting and threshold joints need a flexible sealant, not filler.
Our work is backed for twelve months, in Steeple Aston and everywhere else we cover.
- Where
- Steeple Aston (OX25)
- Wider area
- Oxfordshire
- Cover
- 12 months on all our work
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Aftercare tips
To keep the joints looking good and working properly:
- Wait for the cure time before using a resealed shower
- Don’t wait for the house to settle if water is getting through
- Ventilate bathrooms well, especially in the first year
- Clean sealant with mild detergent, not abrasives
Clean the sealant with a mild detergent and a soft cloth. Avoid abrasive pads and strong solvents as they wear the bead.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Early resealing keeps the job small.
What the job involves on each surface
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.
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Each joint is cleaned and primed where needed.
Joints and finishes in Steeple Aston homes
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you’ve bought a new home near Heyford station, the sealant around baths, showers and frames is worth checking in the first year or two. In and around Steeple Aston, as anywhere, good new build mastic starts with a clean, dry, properly prepared joint.
Steeple Aston is about 7 miles west of Bicester, in Oxfordshire. Anywhere in OX25, our applicators can take on new build mastic. Across Oxfordshire, we cover 443 places, Steeple Aston among them. We also work in Oxford, about 13 miles from Steeple Aston.
Every address in OX25 is covered for new build mastic, from the main roads to the quietest streets. Streets in the area include Jubilee Close, Paines Hill and North Side, all of which we cover. Neighbouring places we cover for new build mastic include Middle Aston (1 mile north), Steeple Barton (2 miles west), Duns Tew (2 miles north-west), North Aston (2 miles north) and Dane Hill (2 miles north). Larger places within reach include Oxford (13 miles south), Banbury (9 miles north), Bicester (7 miles east), Witney (12 miles south-west), Kidlington (8 miles south) and Headington Quarry (13 miles south).
Near you in Steeple Aston
Typical jobs here are in homes near White Lion pub and the streets around them. For rail, the closest station is Heyford station, about 0.9 miles south-east of the centre. Nearby you’ll also find Deddington Castle (3.6 miles north).
Towns and villages near Steeple Aston
What else we do in Steeple Aston
How it works
We keep the work tidy and contained to the joints we’re treating, so you can carry on as normal. The job generally takes a few hours for most snagging lists, longer for a run of plots, and we tell you how long to leave it before we go. In a small place like Steeple Aston, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at why each joint failed, including any movement.
- 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.
Preparing for the visit
- Mention any tricky access
- Plan for the work area to be out of bounds to pets and children
- Clear items away from the joints we’re working on
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, call 0345 464 0079 or drop us an email.
Advice
When it is not the sealant
Before you book, it’s worth knowing the limits too:
- Your warranty claim itself, which is between you and the builder
- Broken tiles or a split tray
- Cracking that points to a structural problem
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Steeple Aston
- Plot handovers
- Show homes
- Windows & doors
- Kitchens
- Bathrooms & en suites
- Skirting & floors
Work for landlords, hotels and businesses
Landlords and letting agents in Steeple Aston can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
For anyone letting property in or around Steeple Aston, several properties can go on one quote. Just tell us the addresses and what each one needs.
DIY versus a professional finish
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
What affects the cost of new build mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- The size of the job
- How many rooms, windows or areas are involved
- The old material and how stubborn it is
- Which sealant suits the joint
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and agree the price before starting.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- Access, such as stairs, a lift or height
- Where the job is, and your postcode
- The rough size of the job
- What’s wrong with the joints now
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work and give you a clear quote.
FAQs for Steeple Aston
Do you cover Steeple Aston for new build mastic?
Yes, Steeple Aston is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing.
I let a flat near Heyford station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that generally means someone at home.
Why does sealant fail so quickly in new builds?
New homes dry out and move in their first couple of years, and sealant is often rushed onto dusty, unprimed surfaces. Either can make it fail early.
Do you take on second-fix sealing for builders?
Yes. We seal plots to the developer’s programme ready for handover. Tell us the plots and the joints involved for a clear quote.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
Is it worth resealing while the house is still settling?
That depends on the joint. A leaking shower or bath seal should be redone straight away, but cosmetic gaps can wait for movement to slow.
Do you use white or clear sealant?
The colour is chosen to suit the tiles, worktop or frame. Let us know your preference when you ask for a quote.