Oxfordshire · England
Window Mastic in Sibford Gower
Window mastic for Sibford Gower, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Hard, cracked sealant around windows
- Sealant in the wrong colour for the frame
- Cracked sealant at the sill ends
Window mastic for homes and businesses in Sibford Gower
Frames and walls don’t move together. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. If you’re dealing with damp patches on the reveal after heavy rain and gaps between the frame and the inside reveal, we can help, whatever the surface.
Somewhere as small as Sibford Gower, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or email us.
- Place
- Sibford Gower (OX15)
- Region
- Oxfordshire
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Sibford Gower questions
Is window mastic in Sibford Gower guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Do you cover Sibford Gower for window mastic?
Yes. We work across London and the South East, and Sibford Gower is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
Do you take out the old sealant first?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Do you work for landlords and businesses?
Yes. As well as householders, we work for landlords, agents, businesses and hotels across Oxfordshire.
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.
Can you seal over the old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
Can you do several jobs on one visit?
Yes, we can. More than one area can be quoted together.
Should I try DIY first?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Nearby places to Sibford Gower
Also in Sibford Gower
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Keep paint off silicone joints
- Look round the frames every year or so
- Avoid blasting the frames with a pressure washer
- Keep solvents and bleach off the sealant
Keep the new mastic undisturbed while it cures, following the cure time we give you. Don’t point a pressure washer at the joints.
Leaks normally show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
Quotes for window mastic in Sibford Gower
There’s no set price list, because no two jobs are the same. What we look at:
- The number and length of the joints
- Whether the work is at height
- Which sealant suits the joint
- How many rooms, windows or areas are involved
Combining jobs into one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear price for the lot.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
- Any access issues, like height or stairs
- The address or postcode of the job
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
What we do, step by step
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and clear up. Most jobs take a morning for a couple of windows and a door. In a small place like Sibford Gower, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check how each frame can be reached safely.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
How to prepare
- Let us know about earlier repairs to the joints
- Mention any tricky access
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Related advice
How the job changes by surface
uPVC windows
uPVC expands and contracts noticeably with temperature, so we use a flexible, low-modulus sealant. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We seal the frame and let you know about anything else.
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Landlord and commercial work in Sibford Gower
Housing providers, facilities teams and property managers book us too in Sibford Gower and across Oxfordshire. Several sites can be quoted together.
If you manage several properties in or around Sibford Gower, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Common problems we fix in Sibford Gower
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar never bonded as it should, so it comes away long before its time.
Signs it’s time to call us include:
- Mastic that has split away from the wall
- Cracked internal joints between frame and plaster
- Draughts coming in around windows and doors
- Old mastic that has gone black or come away
Schools such as Sibford Gower Endowed Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Before you book anyone
- How hidden problems are handled
- How the joint is cleaned and prepared
- How the colour is chosen
- Is VAT in the price?
Sibford Gower homes and the weather
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Broughton Castle (about 4 miles east) are a reminder that the area around Sibford Gower has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you live in an older home near Church of Holy Trinity, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Sibford Gower is about 6 miles west of Banbury, in Oxfordshire. We provide window mastic to homeowners, landlords and businesses in Sibford Gower and the surrounding area, as part of our work across Oxfordshire. Our Oxfordshire coverage runs to 443 places, and Sibford Gower is one of them. Oxford is on our list too, around 23 miles away.
Postcode districts we cover here for window mastic: OX15. You’ll find streets such as Main Street, Colony Road and Pound Lane, and we cover them all. Nearby, we also carry out window mastic in Burdrop (1 mile east), Sibford Ferris (1 mile south-east), Swalcliffe (2 miles east), Epwell (2 miles north) and Shutford (3 miles north-east). Further out, we also cover Banbury (6 miles east), Chipping Norton (7 miles south), Neithrop (5 miles east), Grimsbury (7 miles east), Ruscote (5 miles east) and Woodstock (14 miles south-east).
Near you in Sibford Gower
Around Sibford Gower, our work takes us to homes and buildings near Sibford School, among other places. Nearby you’ll also find Broughton Castle (4 miles east). The countryside around Sibford Gower includes Castle Hill and Woodford Bottom and Lamb's Pool.