Medway · England
Window Mastic in St Mary Hoo
Mastic around window and door frames, sills and patio doors in St Mary Hoo, with a 12-month guarantee on every job. Call for a quick quote.
- Cracked internal joints between frame and plaster
- Mastic that is falling out in pieces
- Damp patches on the reveal after heavy rain
Window mastic in St Mary Hoo, done properly
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. Where the air is getting in through the window itself, we’ll say so. We work on window sills, aluminium frames and timber windows & doors, and common reasons people get in touch are a bead that doesn’t match the frame and gaps left after new windows were fitted.
In a village or hamlet like St Mary Hoo, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Location
- St Mary Hoo (ME3)
- Region
- Medway
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Window mastic in St Mary Hoo: local notes
St Mary Hoo is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
St Mary Hoo is about 4 miles south of Canvey Island, in Medway. For window mastic in and around St Mary Hoo, it’s easy to get a quote: please phone 0345 464 0079 or email us. We cover Medway from our Crawley base. Our Medway coverage runs to 68 places, and St Mary Hoo is one of them. You can also see our page for Chelmsford, about 20 miles away.
We work across ME3 for window mastic and the streets around it. If you’re just outside St Mary Hoo, we cover Fenn Street (1 mile south-west), High Halstow (1 mile south-west), Sharnal Street (2 miles south-west), Tunbridge Hill (2 miles south) and Kingsnorth (2 miles south). Further out, we also cover Gillingham (6 miles south), Chatham (8 miles south), Rochester (6 miles south-west), Rainham (7 miles south), Strood (7 miles south-west) and Luton (7 miles south).
Near you in St Mary Hoo
Well-known places in the area include Bay Museum (3.6 miles north) and Medway Maritime Hospital (6 miles south-west). Not far away are Bishop Saltings.
When to call us in St Mary Hoo
Older frames were often sealed with products that set hard. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
The most common problems we see are:
- Draughty joints inside around the window
- Whistling draughts around closed windows
- Gaps where the sill meets the wall
- A bead that doesn’t match the frame
Around St Mary Hoo, as everywhere, window mastic is only as good as the preparation behind it.
What your quote should include
- What preparation is included
- How long the guarantee is
- How hidden problems are handled
- Whether they’re fully insured
How to look after the new joints
Good habits help new joints last longer. A few tips:
- Don’t use solvent cleaners on the joint
- Wash the frames with mild soapy water
- Ventilate rooms so frames don’t stay wet inside
- Paint up to the joint, not over it
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
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.
Why deal with it now?
Running fresh sealant over the old joint is tempting, but new sealant can’t bond to old, crumbling mastic. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. Around St Mary Hoo, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
What it costs depends on how much there is to do, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Why St Mary Hoo customers choose us
- A 12-month guarantee on all work
- Colour picked to suit the job
- Old sealant always removed completely
- ARBOMaster approved applicator
See what affects the cost and what customers say.
What sealant work can’t fix
A few problems are outside what sealant work can do:
- A failed sealed unit that has misted up
- Rotten timber, which needs a joiner first
- Broken hinges, locks or handles
If in doubt, ring 0345 464 0079 or email us and we will say what we think before you book.
What we seal
- Patio & French doors
- uPVC windows
- Composite doors
- Aluminium frames
- Timber windows & doors
- Window sills
How the job changes by surface
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. We’ll point out any rot we find, as that is a job for a joiner.
Aluminium frames
Coated aluminium needs a compatible sealant, and acetoxy silicones are not used, as they can attack some metals. We use a neutral-cure product.
Places near St Mary Hoo
Also in St Mary Hoo
What we do, step by step
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a few frames, or a day or more for a whole house. Somewhere as small as St Mary Hoo, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- 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
- Tell us about any water getting in
- For indoor joints, keep the area dry beforehand if you can
- For business premises, tell us about site rules or sign-in
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you’re ready, call 0345 464 0079 or email us.
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Questions from St Mary Hoo
Do you cover smaller places like St Mary Hoo?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Does the coastal weather in St Mary Hoo affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
Do you work for landlords and businesses?
Yes. We work for householders, landlords, letting agents, businesses and hotels across Medway.
Will resealing my frames help with draughts?
Yes, if the air is getting in around the frame. If it’s through the window’s own seals or a hinge, that is a different fix, and we will say so.
How long does it take to reseal the windows on a house?
A handful of frames is a short visit. You’ll get a timescale with the quote.
Do you have insurance?
Yes. We’re fully insured.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.