Oxfordshire · England
Window & door mastic in Sunningwell, Oxfordshire
Window mastic in Sunningwell from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Sealant in the wrong colour for the frame
- Water coming in at the bottom corners of a door
- Untidy mastic left by window fitters
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Keep timber frames painted
- Air rooms to keep condensation down around windows
- Clean frames with a soft cloth and soapy water
- Paint up to the joint, not over it
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
A failed joint lets water into the wall a little at a time. You might not see it until plaster blows or a damp patch appears inside. Catching it early keeps the fix to a reseal.
Window mastic in Sunningwell, done properly
The new joint doesn’t have to be white. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. We work on timber windows & doors, composite doors and patio & French doors, and the jobs we see most are cracked internal joints between frame and plaster and hard, cracked sealant around windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Sunningwell is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
You’re covered for a year from the day we finish. If anything isn’t right with it, phone 0345 464 0079 or drop us an email.
- Where
- Sunningwell (OX13)
- Region
- Oxfordshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Sunningwell homes and the weather
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Appleton Manor (about 3.2 miles west) nearby, there’s older building stock in the area around Sunningwell as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to Radley station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. For site and facilities teams at buildings such as Sunningwell Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Sunningwell is about 2 miles north of Abingdon-on-Thames, in Oxfordshire. Jobs in Sunningwell get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Sunningwell is one of 443 places in Oxfordshire where we work.
We work across the OX13 postcode area for window mastic. Window mastic is available to properties on Bullsmead, Dark Lane and Sunningwell Road. Neighbouring places we cover for window mastic include Bayworth (1 mile north-east), Boars Hill (1 mile north), Chilswell (2 miles north), Hinksey Hill (2 miles north-east) and Kennington (2 miles east). Further out, we also cover Oxford (4 miles north-east), Didcot (7 miles south), Bicester (15 miles north), Witney (11 miles north-west), Carterton (14 miles west) and Thame (14 miles east).
Around Sunningwell
Typical jobs here are in homes near Albert Park, Fitzharrys School and The Flowing Well pub, among other places. For rail, the closest station is Radley station, roughly 2.3 miles south-east. Nearby you will also find Westgate Shopping Centre (3.6 miles north) and Abingdon Community Hospital (2.2 miles south). For a walk, there’s Harcourt Hill and Lashford Lane Fen.
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Faulty window hardware
- Draughts through the window seals rather than the frame
- A failed sealed unit that has misted up
If you are not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Surfaces we seal
- Window sills
- Composite doors
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- uPVC windows
How it works
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. For a village or hamlet like Sunningwell, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Let us know about stairs, lifts or work at height
- Tell us about any water getting in
- Move anything stored near the joints
Get a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we will take it from there.
Advice
What we’re called out for in Sunningwell
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, and a gap filled solid can’t flex. Backing rod sets the right depth.
Look out for these signs:
- Gaps left after new windows were fitted
- Cracked internal joints between frame and plaster
- Cold air getting in at the frame edge
- White mastic on grey or black frames
If you live in an older home near Church of St Leonard, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What to look for in a quote
- Whether all the old sealant comes out first
- How much experience the applicator has
- What insurance they hold
- What product goes in the joint
What the job involves on each surface
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A neat, narrow bead in a colour to match keeps the clean look.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so a flexible sealant is essential. We seal onto sound, dry paintwork or timber.
Sunningwell: your questions answered
Do you work for landlords with property near Radley station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Will you come out to Sunningwell?
Yes, Sunningwell is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can you seal the gap between the frame and the plaster indoors?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We can do either or both.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Will new mastic stop draughts?
If the draught is coming in around the frame, yes. If it’s coming through the window seals, we will tell you.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Do you have insurance?
Yes, we are fully insured for every job we do.
DIY versus a professional finish
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
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.