Oxfordshire · England
Radley Window Mastic
Mastic around window and door frames, sills and patio doors for homes and businesses in Radley and across Oxfordshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Gaps between the frame and the inside reveal
- White mastic on grey or black frames
- Black, perished sealant on frames
Window mastic in Radley
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. If you have sealant in the wrong colour for the frame and water coming in at the bottom corners of a door, we can help.
Mastic can only go onto a dry, clean joint, so window work in Radley is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
We stand behind the work with a one-year guarantee, so you are covered after we have gone.
- Where
- Radley (OX14)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How the job changes by surface
Aluminium frames
Aluminium needs a sealant that bonds to coated metal, and acetoxy silicones aren’t used, as they can attack some metals. Neutral-cure sealant is the safe choice.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Use gentle cleaners on frames and sealant
- Do not aim a pressure washer at the joints
- Keep drainage slots and sill grooves clear
- Don’t paint over the silicone
Silicone can’t normally be painted, so if you are planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
Frames and glazing around Radley
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Clifton Hampden Manor (about 2.7 miles south-east) nearby, there’s older building stock in the area around Radley as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you look after a building such as Radley Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Radley station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Radley is about 2 miles north-east of Abingdon-on-Thames, in Oxfordshire. Homes, rented property, offices and hotels in Radley is covered for window mastic. The work is guaranteed for a year. Radley is one of 443 places in Oxfordshire we cover for window mastic.
Every address in OX14 is covered for window mastic. Window mastic is available to properties on Church Road, Selwyn Crescent and Ferny Close. Other places close to Radley include Abingdon-on-Thames (2 miles south-west), Nuneham Courtenay (2 miles east), Culham (2 miles south), Clifton Hampden (3 miles south-east) and Caldecott (3 miles south-west). Larger places within reach include Oxford (4 miles north), Didcot (5 miles south), Bicester (15 miles north), Witney (13 miles north-west), Thame (12 miles east) and Wantage (10 miles south-west).
Local landmarks in Radley
Around Radley, our work takes us to homes and buildings near Nuneham Courtenay, Fitzharrys School and Bowyer Arms. Radley has its own railway station: Radley station. Other landmarks nearby include Littlemore Hospital (2.3 miles north) and FitzHarris Castle (1.8 miles south-west). The countryside around Radley includes Harcourt Hill and Dry Sandford Pit.
For landlords and businesses
We also work for property managers and facilities teams. Several sites can be quoted together, and we are fully insured.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
When to call us in Radley
On timber frames, paint and putty build up around the joint. Mastic painted over many times cracks with the paint, and timber moves with moisture as well as temperature.
Look out for these signs:
- Gaps left after new windows were fitted
- A bead that does not match the frame
- Damp patches on the reveal after heavy rain
- Gaps where the sill meets the wall
If you live in an older home near Church of St James, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Before booking anyone
- The length of the guarantee
- Are they insured?
- Who does the work, and how experienced they are
- Whether they seal over old material or remove it
Towns and villages near Radley
What else we do in Radley
How it works
Before we leave, we go over the finished joints with you. The visit itself normally takes a few hours for a few frames, or a day or more for a whole house, depending on the amount of work. Somewhere as small as Radley, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
How to prepare
- Mention any sign-in or site rules at work premises
- Clear the area around the work
- Let us know if you’ve seen damp or leaks
Get a quote
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work and send you a clear quote.
Advice
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Radley questions
Is Radley within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you do window mastic in Radley?
Yes, Radley is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Is the work guaranteed?
Yes. Every job comes with our one-year guarantee, and we are ARBOMaster approved applicators.
Is it OK to seal over old sealant?
No, it won’t last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before resealing.
Where is Mr Mastic based?
We are based in Crawley, and we work across South East England, London and Scotland.
Will it make a mess?
We keep the work tidy. Nearby surfaces are protected.
Can you match the sealant to my frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available, so the joint suits the frame.
How we quote for window mastic
Your quote is based on your job. We look at:
- The old material and how stubborn it is
- Access and height
- How many areas need sealing
- Working hours on commercial sites
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Whether it has been sealed before
- Any access issues, like height or stairs
- The type of property
- The address or postcode of the job
Want a quote for window mastic? Please phone 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.