Surrey · England
Window & door mastic in Coxhill Green, Surrey
We cover Coxhill Green for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- Gaps left after new windows were fitted
- Mastic that has split away from the wall
- Cold air getting in at the frame edge
Window mastic for homes and businesses in Coxhill Green
Most frames have an outside joint and an inside one. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. Common call-outs are for cracked or shrunken mastic around the frame and gaps left after new windows were fitted, across uPVC windows, window sills and aluminium frames.
Mastic can only go onto a dry, clean joint, so window work in Coxhill Green is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Coxhill Green (GU24)
- Region
- Surrey
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Broken hinges, locks or handles
- Worn gaskets, brush seals or a door that has dropped
- Damp problems in the wall away from the window
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Joints and surfaces we work on
- uPVC windows
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- Composite doors
- Window sills
Your questions about window mastic in Coxhill Green
Do you cover smaller places like Coxhill Green?
Yes, Coxhill Green is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for landlords with property near Longcross station?
Yes. We work for landlords and agents as well as homeowners. You can ring 0345 464 0079 or email us with the details for a clear quote.
Do you seal inside as well as outside?
Yes, we do both. Indoors, we seal between the frame and the plaster or reveal, using a paintable sealant if you want to decorate.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Where is Mr Mastic based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Is the new sealant paintable?
Not generally, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Also near Coxhill Green
More services for Coxhill Green
What the job involves on each surface
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We’ll tell you which suits your home.
Window sills
The end joints of a sill tend to fail before the rest. We reseal them so rain cannot run into the wall.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
How it works
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. It normally takes anything from an hour or two to a full day, depending on how many frames there are. Somewhere like Coxhill Green needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check how each frame can be reached safely.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Let us know about earlier repairs to the joints
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work.
Read more
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Avoid harsh chemicals near the mastic
- Use gentle cleaners on frames and sealant
- Keep timber frames painted
- Make sure the drainage slots aren’t blocked
Most silicone sealants will not take paint, so mention any painting plans before we start. There are paintable sealants for joints that need it.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.
What happens if it’s left?
A cracked joint around a frame lets rain into the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. Resealing now is a small job by comparison. Around Coxhill Green, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Why us?
- A choice of colours where the product allows
- Homes, businesses and hotels
- Arbo and Everbuild products
- More than 20 years in sealant work
Coxhill Green homes and the weather
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. With historic houses such as Botleys Mansion (about 3.5 miles north-east) nearby, there’s older building stock in the area around Coxhill Green as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Managing a site like St Lawrence CofE (Aided) Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Longcross station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. For an older house near a landmark such as Church of St Lawrence, the joint between an old wall and a newer frame is normally the first place rain gets in.
Coxhill Green is about 2 miles north-west of Goldsworth Park, in Surrey. Our applicators cover window mastic for homes and businesses in Coxhill Green and the surrounding area. Across Surrey, we cover 395 places, Coxhill Green among them. There’s also a page for Reading, about 18 miles away.
Postcode districts we cover here for window mastic: GU24. Whether your property is on Beta Road, Delta Road and Alpha Road or anywhere close by, we can help. We also cover the places around Coxhill Green: Chobham (1 mile north-east), Castle Green (1 mile south-west), Penny Pot (1 mile south-west), West End (2 miles south-west) and Brick Hill (2 miles north-west). We also work in nearby towns such as Guildford (7 miles south), Woking (3 miles south-east), Camberley (5 miles west), Epsom (14 miles east), Farnham (13 miles south-west) and Ewell (15 miles east).
Around Coxhill Green
We work in homes and buildings around Milford Green and Coxhill Green, The Sun Public House and Gordon's School and the streets around them. For rail, the closest station is Longcross station, about 2.6 miles north of the centre. Other landmarks nearby include The Peacocks (2.7 miles south-east) and Chobham Museum (under half a mile south). Not far away are Virginia Water Lake and Gracious Pond.
Quotes for window mastic in Coxhill Green
We quote each job individually. These are the things that affect it:
- How easy the joints are to reach
- Working hours on commercial sites
- The size of the job
- How many rooms, windows or areas are involved
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, ring 0345 464 0079 or email us and we will give you an honest view and a quote.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
- Photos by email, if that’s easy
- Any previous sealing or DIY work
Asking for a quote is easy: tell us what needs doing and where. A few photos by email make the job easier to understand, and we will take it from there.