Kent · England
Window Mastic in St Mary's Bay
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in St Mary's Bay. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Gaps left after new windows were fitted
- Water coming in at the bottom corners of a door
- Sealant in the wrong colour for the frame
What happens on the day
The work is kept neat and contained to the joints we’re treating, so you can carry on as normal. Expect the work to take a few hours for a few frames, or a day or more for a whole house. In a smaller place like St Mary's Bay, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
- Keep pets and children clear of the area while we work
Get a quote
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Related advice
About our window mastic in St Mary's Bay
Whether it’s one leaking patio door or every frame on the house, you’ll get a clear quote before any work starts. To get one, ring 0345 464 0079 or send us an email with the number of frames and any access details. We work on uPVC windows, aluminium frames and window sills, and the jobs we see most are rushed sealant from a window installation and cracked sealant at the sill ends.
Many houses in smaller places like St Mary's Bay have conservatories, garden rooms or patio doors. Their glazing joints and frame seals are as much a part of the job as the windows.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- St Mary's Bay (TN29)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Also near St Mary's Bay
Other services in St Mary's Bay
Your questions about window mastic in St Mary's Bay
Is window mastic in a coastal place like St Mary's Bay any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Is St Mary's Bay in your area for window mastic?
Yes. Our work covers London and the South East, and St Mary's Bay is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear price.
Do the sealants smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Can you do upstairs windows?
Yes, if safe access is possible. For high or awkward windows, we will tell you what access is needed.
Do you work for landlords and businesses?
Yes, often. We can quote for several properties at once, and between tenancies is a good time for the work.
Do I need to be at home?
If the work is inside, we need someone to let us in. Once we have agreed the job, you don’t need to watch us work.
Are you fully insured?
Yes, we are fully insured for every job we do.
Which products do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we are using.
What affects the cost of window mastic
You’ll get a clear quote before work begins. It takes into account:
- Which sealant suits the joint
- The size of the job
- Working hours on commercial sites
- How many rooms, windows or areas are involved
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Whether it has been sealed before
- The type of property
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work and give you a clear quote.
Why it’s worth doing now in St Mary's Bay
Failed mastic is not a reason to replace sound windows. If the frames and glass are in good order, resealing the joints is often all that is needed. Problems with the glass or gaskets are for a window company, and we will say so. In an older home around St Mary's Bay, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why book with us
- We never seal over old sealant
- ARBOMaster approved applicator
- Quality sealants from Arbo and Everbuild
- Sanitary silicone with an anti-fungal additive in wet areas
See our cost guide or what customers say.
Common problems we fix in St Mary's Bay
Sun, frost and rain wear sealant out. Sunlight dries the surface out, until it loses its stretch and starts to crack.
If you can see any of these, it’s time to have the joints looked at:
- Cracked sealant at the sill ends
- Cracked or shrunken mastic around the frame
- Mastic that’s falling out in pieces
- White mastic on grey or black frames
For site and facilities teams at buildings such as The Marsh Academy, larger buildings have plenty of frames, and the mastic around each one ages.
What to look for in a quote
- What product goes in the joint
- What guarantee comes with the work
- Whether you can choose the colour
- Are they insured?
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Keep solvents and bleach off the sealant
- Keep drainage slots and sill grooves clear
- Wipe condensation off the frames
- Wash the frames with mild soapy water
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Frames and glazing around St Mary's Bay
St Mary's Bay is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. 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.
Homes close to All Saints include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
St Mary's Bay is about 6 miles south-west of Hythe, in Kent. We provide window mastic to householders, landlords and businesses in St Mary's Bay and nearby. St Mary's Bay is one of 922 places in Kent we cover for window mastic. Brighton is on our list too, around 50 miles away.
Postcode districts we cover here for window mastic: TN29. Whether your property is on Maple Drive, Oak Drive and Beechwood Close or anywhere close by, we can help. If you’re just outside St Mary's Bay, we cover St Mary in the Marsh (1 mile west), Burmarsh (3 miles north), Newchurch (3 miles north-west), Postling Green (5 miles north) and Bonnington (6 miles north). Within a short drive, we also cover Ashford (10 miles north-west), Folkestone (10 miles north-east), Hythe (6 miles north-east), Hawkinge (11 miles north-east), Tenterden (13 miles west) and Cheriton (9 miles north-east).
What’s near St Mary's Bay
Typical jobs here are in homes near Romney Warren Country Park, among other places. Nearby you’ll also find Romney 'castle' (3.6 miles west).
When something else is needed
In fairness, there are a few things sealant won’t fix:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Rotten timber, which needs a joiner first
- Draughts through the window seals rather than the frame
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before you book.
What we seal
- Window sills
- Timber windows & doors
- Aluminium frames
- uPVC windows
- Patio & French doors
- Composite doors