Surrey · England
Window Mastic in Longcross
Our applicators work in Longcross on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Hard, cracked sealant around windows
- Sealant in the wrong colour for the frame
- Draughts coming in around windows and doors
About our window mastic in Longcross
The new joint doesn’t have to be white. We can seal in white, brown, anthracite grey, black or clear, so the line suits the frame instead of standing out. Common call-outs are for draughty joints inside around the window and gaps where the sill meets the wall, across patio & French doors, window sills and uPVC windows.
Homes in small places like Longcross often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Place
- Longcross (KT16)
- Region
- Surrey
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlord and commercial work in Longcross
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
What happens if it’s left?
A quick bead over the top of old mastic looks like an easy fix, but it will not grip old, dirty sealant. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. Older cottages and farmhouses around Longcross can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
What you get with us
- Neat joints and a tidy finish
- Anti-fungal sanitary silicone in wet areas
- Colour agreed with you before any work starts
- Rated 4.9 stars on Google
Take a look at how sealant jobs are priced or our reviews.
How the job changes by surface
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A neat, narrow bead in a colour to match keeps the clean look.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so the joint must stay flexible. We seal onto sound, dry paintwork or timber.
The process
We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take a few hours for a few frames, or a day or more for a whole house. Somewhere as small as Longcross, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Keep pets and children clear of the area while we work
- For business premises, tell us about site rules or sign-in
Get a quote
For window mastic in Longcross, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Read more
Looking after it afterwards
To keep the joints looking good and working properly:
- Clear any debris from frame drain holes
- Do not aim a pressure washer at the joints
- Keep paint and stain on wooden frames in good order
- Don’t use solvent cleaners on the joint
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
Leaks usually show up in wet, windy weather, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
Longcross: your questions answered
Do you work for landlords with property near Longcross station?
Yes. We work for landlords and letting agents as well as homeowners. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Can you do window mastic in Longcross?
Yes. We work across London and the South East, and Longcross is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear quote.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or drop us an email.
Are you insured?
Yes, we are fully insured for domestic and commercial work.
How do I get a quote for window mastic in Longcross?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Can new window sealant be painted?
Not usually, if it’s silicone. Tell us your decorating plans and we’ll pick a sealant to suit.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Quotes for window mastic in Longcross
Every job gets its own quote. This is what makes a difference:
- The number of rooms or windows
- When we can work, for business premises
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
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:
- How we’d reach the joints
- The rough size of the job
- Any previous sealing or DIY work
- A few pictures by email, if you can
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, call 0345 464 0079 or email us.
DIY versus a professional finish
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.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
What else we do in Longcross
Windows and doors in Longcross
London and the South East are among 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 2.3 miles east) nearby, there’s older building stock in the area around Longcross 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 live in an older home near Longcross Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you let a flat or house near Longcross station, renewing tired window mastic between tenants heads off draught and damp complaints.
Longcross is about 4 miles south-west of Egham, in Surrey. From the centre of Longcross to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Longcross is one of 395 towns and villages in Surrey where we work. For nearby work, see our Reading page.
We work across the KT16 postcode area for window mastic and the streets around it. If you need window mastic at a property on Longcross Road, Tanglewood Close and Albury Close or a nearby road, our applicators can take on the job. We also cover Trumps Green (1 mile north-east), Stonehill (1 mile south-east), Lyne (2 miles east), Mimbridge (3 miles south) and Ottershaw (3 miles south-east). Within a short drive, we also cover Guildford (9 miles south), Woking (4 miles south), Camberley (7 miles south-west), Epsom (14 miles east), Farnham (15 miles south-west) and Ewell (14 miles east).
Local landmarks in Longcross
Around Longcross, our work takes us to homes and buildings near Gracious Pond, among other places. For rail, the closest station is Longcross station, roughly 0.6 miles north-west of the centre. Nearby you will also find St. Peter's Hospital (2.6 miles east) and Chobham Museum (2.2 miles south). Not far away are Virginia Water Lake and St Ann's Hill.