Surrey · England
Window & door mastic in Castle Green, Surrey
We cover Castle Green for mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Rain getting in at the frame or under the sill
- Leaking joints at the ends of sills
- Mastic that has split away from the wall
What sealant work cannot fix
To be straight with you, there are a few things sealant will not fix:
- Worn gaskets, brush seals or a door that has dropped
- A sash or casement that will not close properly
- Condensation trapped between the panes
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
What we seal
- Timber windows & doors
- Aluminium frames
- Window sills
- uPVC windows
- Composite doors
- Patio & French doors
About our window mastic in Castle Green
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that cannot move properly, so deep gaps get backing rod first. That way the new bead bonds to the frame and the wall only. Typical jobs include old mastic that has gone black or come away and cracked or shrunken mastic around the frame, across composite doors, uPVC windows and patio & French doors.
Mastic can only go onto a dry, clean joint, so window work in Castle Green 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’re covered after we’ve gone.
- Where
- Castle Green (GU24)
- Region
- Surrey
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
Window sills
Masonry sills can have joints where water gets in, including the one between the sill and the frame above. Those are sealed with a product suited to stone or concrete.
Composite doors
An exposed front door gets wind-driven rain. We pay most attention there.
When to call us in Castle Green
Water runs down the glass onto the sill, so the sill ends and the joint below the frame are common leak points. When that sealant fails, water gets into the wall or under the frame.
Common reasons people contact us include:
- Rain getting in at the frame or under the sill
- Leaking joints at the ends of sills
- Cold air getting in at the frame edge
- Rushed sealant from a window installation
If you look after a building such as St Lawrence CofE (Aided) Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Before you book anyone
- When the joint can take water or movement
- Is VAT in the price?
- Whether they’re fully insured
- Who turns up on the day
What window mastic looks like in Castle Green
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Botleys Mansion (about 4.2 miles north-east) are a reminder that the area around Castle Green has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For an older house near a landmark such as Church of St Lawrence, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you let a flat or house near Brookwood station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Castle Green is about 2 miles north-west of Woking, in Surrey. Castle Green gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Castle Green is one of 395 places in Surrey where we work for window mastic. For nearby work, see our Reading page.
Every address in GU24 is within our area for window mastic, from the main roads to the quietest streets. Streets in the area include Scotts Grove Road, Guildford Road and Scott's Grove Close, and we cover them all. Neighbouring places we cover for window mastic include Penny Pot (1 mile north-west), Coxhill Green (1 mile north-east), Chobham (1 mile north-east), West End (1 mile west) and Bisley (1 mile south-west). We also work in nearby towns such as Guildford (6 miles south), Camberley (5 miles west), Epsom (15 miles east), Farnham (12 miles south-west), Ewell (15 miles east) and Egham (7 miles north-east).
Around Castle Green
Around Castle Green, our work takes us to homes and buildings near The Sun Public House, Gordon's School and Milford Green and Coxhill Green and the streets around them. The nearest railway station is Brookwood station, roughly 2.6 miles south-west. Well-known places in the area include Brookwood Hospital (1.6 miles south) and Chobham Museum (0.8 miles north-east). Open spaces near Castle Green include Brookwood Lye.
Also in Castle Green
Why act early in Castle Green
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. We cut out properly, back deep gaps and tool every joint neatly, in a sealant suited to the wall. Older cottages and farmhouses around Castle Green can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Castle Green
- A sealant colour to suit the surroundings
- One-year guarantee on every job
- Anti-fungal sanitary silicone in wet areas
- We agree the colour with you first
Take a look at our cost guide and what customers say.
Landlord and commercial work in Castle Green
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
The process
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes most of a day for a typical house, less for a few frames, depending on the size of the job. For a village or hamlet like Castle Green, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- 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.
Preparing for the visit
- Let us know about parking restrictions
- Try not to wet indoor joints just before the visit
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we will take it from there.
Read more
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Your questions about window mastic in Castle Green
Can you do window mastic in Castle Green?
Yes, Castle Green is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we’ll give you a clear price.
Is Castle Green within the area you cover?
Yes. Castle Green is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for letting agents?
Yes. We work for householders, landlords, letting agents, businesses and hotels in Castle Green.
Where do you work from?
We work from Crawley. Our applicators cover Castle Green, along with the rest of our area.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Will new mastic stop draughts?
If the draught is coming in around the frame, yes. If it’s through the window’s own seals or a hinge, that is a different fix, and we’ll say so.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and you will get one quote.