Kent · England
Window Mastic in Sellindge
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Sellindge. Fully insured, ARBOMaster approved and guaranteed for a year.
- Whistling draughts around closed windows
- Mastic that has split away from the wall
- Water coming in at the bottom corners of a door
Windows and doors in Sellindge
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Westenhanger Castle (about 1.4 miles south-east) are a reminder that the area around Sellindge 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 is traditional sand mastic.
For landlords with property near Westenhanger station, renewing tired window mastic between tenants heads off draught and damp complaints. If you look after a building such as Sellindge Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Sellindge is about 4 miles north-west of Hythe, in Kent. For window mastic in and around Sellindge, please phone 0345 464 0079 or email us for a quick quote. We cover Kent from our Crawley base. Sellindge is one of 922 places in Kent we cover. There’s also a page for Chelmsford, about 49 miles away.
All of TN25 is covered for window mastic, from the main roads to the quietest streets. Whether your property is on Downs Way, Woodlees Close and Swan Green or anywhere close by, we can help. Nearby, we also carry out window mastic in Moorstock (1 mile north), Stanford (2 miles east), Postling (3 miles east), Stowting (3 miles north-east) and Skeete (3 miles north-east). Further out, we also cover Ashford (6 miles north-west), Canterbury (13 miles north), Dover (13 miles east), Folkestone (7 miles east), Faversham (15 miles north) and Hythe (4 miles south-east).
Local landmarks in Sellindge
The closest station to Sellindge is Westenhanger station, roughly 1.6 miles south-east of the centre. A little further out are William Harvey Hospital (4.7 miles north-west) and Lympne Castle (2.4 miles south). Open spaces near Sellindge include Tolsford Hill and Hatch Park.
Window mastic for homes and businesses in Sellindge
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. The old mastic is removed and the joint resealed with a flexible exterior sealant. If you have black, perished sealant on frames and leaking joints at the ends of sills, we can put it right, on uPVC windows, composite doors and timber windows & doors alike.
Around Sellindge, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Our work is backed for twelve months, in Sellindge and everywhere else we cover.
- Place
- Sellindge (TN25)
- Region
- Kent
- Cover
- A year, on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
FAQs for Sellindge
Is Sellindge in your area for window mastic?
Yes, Sellindge is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing.
Can you help a landlord with a rental near Westenhanger station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Can you do several jobs on one visit?
Yes, and it often makes sense. Doing several areas at once is normally more efficient.
What do you need from me for a quote?
Tell us what needs doing and where. If we need more, we’ll ask.
Can new window sealant be painted?
That depends on the product. Some hybrid sealants can be painted; silicone cannot. Mention any painting plans before work begins.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us and we are fully insured.
Do you have insurance?
Yes. Full insurance covers our work.
When to call us in Sellindge
Every frame moves through the day. Sun on a frame makes it expand, and it contracts again overnight, while the masonry beside it stays put. A sealant that can’t keep up eventually tears.
People generally contact us when they notice one of these:
- A bead that does not match the frame
- Damp patches on the reveal after heavy rain
- Mastic that’s falling out in pieces
- Gaps where the sill meets the wall
For an older house near a landmark such as Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Before booking anyone
- Whether the sealant suits the joint
- How the surfaces are prepared before sealing
- How long to leave it before use
- How much experience the applicator has
How it works
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes most of a day for a typical house, less for a few frames, depending on the amount of work. In a small place like Sellindge, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
Get a quote
Need a quote? Please call 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 sealant work can’t fix
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- A frame that has rotted at the joint
- Broken hinges, locks or handles
- Draughts through the window seals rather than the frame
If in doubt, ring 0345 464 0079 or email us and we will say what we think before booking.
Where we work in Sellindge
- Composite doors
- uPVC windows
- Timber windows & doors
- Aluminium frames
- Window sills
- Patio & French doors
Other services in Sellindge
Different surfaces, different methods
Aluminium frames
Coated aluminium needs a compatible sealant, and acetoxy silicones are not used, as they can attack some metals. Neutral-cure sealant is the safe choice.
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so we pay close attention there.
Quotes for window mastic in Sellindge
The price is agreed before any work begins. It takes into account:
- When we can work, for business premises
- How many rooms, windows or areas are involved
- Whether the work is at height
- The old material and how stubborn it is
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- A few pictures by email, if you can
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
To get a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Looking after it afterwards
Looking after new joints is easy:
- Don’t paint over the silicone
- Check the mastic once a year
- Clear any debris from frame drain holes
- Ventilate rooms so frames do not stay wet inside
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
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.