Oxfordshire · England
Great Haseley Window Mastic
We cover Great Haseley for mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Cracked internal joints between frame and plaster
- Leaking joints at the ends of sills
- A bead that does not match the frame
Window mastic for homes and businesses in Great Haseley
Most frames have an outside joint and an inside one. The external joint is the weather seal; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. We are often asked to deal with rain getting in at the frame or under the sill and cold air getting in at the frame edge, on aluminium frames, uPVC windows and composite doors.
In a village or hamlet like Great Haseley, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
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.
- Location
- Great Haseley (OX44)
- Wider area
- Oxfordshire
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Air rooms to keep condensation down around windows
- Keep jet washers away from the mastic
- Clear any debris from frame drain holes
- Look round the frames every year or so
Keep the new mastic undisturbed while it cures, for as long as we advise. Keep jet washers away from the frames.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
Window mastic in Great Haseley: local notes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Garsington Manor (about 3.5 miles west) are a reminder that the area around Great Haseley has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Managing a site like Great Milton Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Great Haseley is about 5 miles south-west of Thame, in Oxfordshire. Across the OX44 area, we cover window mastic for homes and businesses. 443 places in Oxfordshire are on our list. We also work in Oxford, about 7 miles from Great Haseley.
Here we cover the OX44 postcode area for window mastic. We cover properties on Rectory Road, Horse Close Cottages and Back Way. We also cover the places around Great Haseley: Great Milton (1 mile north-west), Milton Common (1 mile north-east), Tiddington (2 miles north), Albury (2 miles north-east) and Draycott (3 miles north). Further out, we also cover Oxford (7 miles west), Didcot (10 miles south-west), Bicester (14 miles north), Abingdon-on-Thames (9 miles west), Thame (5 miles north-east) and Henley-on-Thames (14 miles south-east).
Landmarks near Great Haseley
In Great Haseley, that means homes and buildings near The Plough Inn and the streets around them. Well-known places in the area include Thame Community Hospital (5.1 miles north-east) and Waterperry Gardens Rural Museum (2.8 miles north). For a walk, there’s Wells Farm.
What we are called out for in Great Haseley
Joints that are too thin or too deep fail early. A skim of sealant over a wide gap soon tears, and a gap filled solid cannot flex. Backing rod sets the right depth.
It’s worth asking for a quote if you see:
- Water coming in at the bottom corners of a door
- Cracked or shrunken mastic around the frame
- Sealant in the wrong colour for the frame
- Gaps left after new windows were fitted
In the older streets around Church of St Peter, the joint between an old wall and a newer frame is normally the first place rain gets in.
What your quote should include
- How long to leave it before use
- Whether VAT is included
- How the joint is cleaned and prepared
- Who turns up on the day
Different surfaces, different methods
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. We cut it out, back any deep gaps and reseal properly.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We’ll tell you which suits your home.
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Damp problems in the wall away from the window
- Draughts through the window seals rather than the frame
- Condensation trapped between the panes
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Window sills
- Timber windows & doors
- Patio & French doors
- uPVC windows
- Aluminium frames
- Composite doors
Towns and villages near Great Haseley
Other services in Great Haseley
The process
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. The job generally takes anything from an hour or two to a full day, depending on how many frames there are. For a village or hamlet like Great Haseley, 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 each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Preparing for the visit
- Mention any parking rules near the property
- Keep pets and children clear of the area while we work
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Want a quote for window mastic? Please phone 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
What affects the cost of window mastic
The quote reflects the job in front of us. We look at:
- Working hours on commercial sites
- Whether the work is at height
- The old material and how stubborn it is
- The product the joint needs
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or send us an email and we’ll talk you through it.
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:
- Photos by email, if that’s easy
- If it’s domestic, commercial or a hotel
- Any access issues, like height or stairs
- The address or postcode of the job
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, ring 0345 464 0079 or email us.
Why act early in Great Haseley
Redecorating is a good moment to renew the mastic. A clean new bead makes new paint or render look finished, and it’s easier while the walls are being worked on anyway. Around Great Haseley, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost reflects the work involved, not a rough estimate. That’s why we ask a few questions first and send you a clear quote before we start.
Why us?
- You choose the colour before work begins
- A 12-month guarantee on all work
- We are fully insured
- Anti-fungal silicone where joints get wet
Your questions about window mastic in Great Haseley
Is Great Haseley within the area you cover?
Yes, Great Haseley is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is window mastic in Great Haseley guaranteed?
All our work, in Great Haseley and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Can you match the sealant to my frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Can landlords and businesses book you?
Yes. We work for householders, landlords, letting agents, businesses and hotels.
Is it OK to seal over old sealant?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Do you work on first-floor windows?
Yes, where it’s safe. For high or awkward windows, we’ll tell you what access is needed.
How do I get a quote for window mastic in Great Haseley?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or drop us an email and let us know what needs doing and where.