Kent · England
Window Mastic in Borough Green
Window mastic for Borough Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Damp patches on the reveal after heavy rain
- Draughts coming in around windows and doors
- Gaps where the sill meets the wall
What happens on the day
We keep the work tidy and contained to the joints we’re treating, so you can get on with your day. Expect the work to take anything from an hour or two to a full day, depending on how many frames there are, and we explain the cure time before we leave. Parking around Borough Green is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Mention if the joints have been sealed before
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
We quote each job on its own. Just call 0345 464 0079 or drop us an email with the details, and photos are welcome.
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Window mastic for homes and businesses in Borough Green
From a single sill to a whole house of windows, you will get a clear quote before any work starts. Just call 0345 464 0079 or email us and tell us how many frames there are and how they’re reached. We work on aluminium frames, patio & French doors and timber windows & doors, and the jobs we see most are rushed sealant from a window installation and cracked or shrunken mastic around the frame.
Around Borough Green, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows.
Every job comes with our one-year guarantee, wherever you are in Kent.
- Where
- Borough Green (TN15)
- Wider area
- Kent
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Your questions about window mastic in Borough Green
I let a flat near Borough Green & Wrotham station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Will you come out to Borough Green?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that normally means someone at home.
Can new sealant go over the old?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Is there any odour?
Possibly a little. It fades as the sealant cures.
How long before the joint can be used?
Different products cure at different speeds, so please follow the time we give you.
Can you match the sealant to my frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before resealing.
Window mastic in Borough Green: local notes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Old Soar Manor (about 2.1 miles south) are a reminder that the area around Borough 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.
If you look after a building such as Borough Green Primary School, its window and door frames need their mastic kept sound, just like a home’s. If you let a flat or house near Borough Green & Wrotham station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Borough Green is about 5 miles east of Sevenoaks, in Kent. Every kind of property in Borough Green is covered for window mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our Kent coverage runs to 922 places, and Borough Green is one of them. We also work in London, around 23 miles away.
Postcode districts we cover here for window mastic: TN15. If you need window mastic at a property on Station Road, High Street and Hill View or a nearby road, we can help. If you are just outside Borough Green, we cover Basted (1 mile south), Platt (1 mile east), Crouch (1 mile south), Claygate Cross (1 mile south) and Comp (1 mile east). We also work in nearby towns such as Maidstone (10 miles east), Dartford (11 miles north), Sevenoaks (5 miles west), Royal Tunbridge Wells (11 miles south), Gravesend (10 miles north) and Tonbridge (7 miles south).
Near you in Borough Green
Around Borough Green, our work takes us to homes and buildings near Wrotham School, Red Lion Public House and Wrotham School and the streets around them. Borough Green has its own railway station: Borough Green & Wrotham station. Other landmarks nearby include Ightham Court (0.9 miles west) and Sevenoaks Hospital (4.9 miles west).
What affects the cost of window mastic
Every job gets its own quote. This is what makes a difference:
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
- The amount of work
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
Helping us quote
When you call or email, it’s useful to know:
- A few pictures by email, if you can
- Where the property is
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
Towns and villages near Borough Green
What else we do in Borough Green
When to call us in Borough Green
Joint shape matters as much as the product. A skim of sealant over a wide gap soon tears, and a gap filled solid cannot flex. Backing rod sets the right depth.
It’s worth asking for a quote if you see:
- Mastic that has split away from the wall
- Untidy mastic left by window fitters
- Water coming in at the bottom corners of a door
- A bead that doesn’t match the frame
In the older streets around The Church of the Good Shepherd, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Before booking anyone
- What the cure time is
- What product goes in the joint
- Are they insured?
- Whether they seal over old material or remove it
Why it’s worth doing now in Borough Green
Getting a straight, even bead on an outside frame takes practice, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. Homes in smaller places like Borough Green can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
Why choose Mr Mastic in Borough Green
- Colour picked to suit the job
- Full insurance on every job
- Trusted Arbo and Everbuild sealants
- White, clear, grey or another colour, product permitting
See what affects the cost and our reviews.
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Damp coming through the wall itself rather than the frame joint
- Rotten timber, which needs a joiner first
- Faulty window hardware
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before you book.
Surfaces we seal
- Aluminium frames
- Composite doors
- Patio & French doors
- Window sills
- uPVC windows
- Timber windows & doors
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
How the job changes by surface
Composite doors
An exposed front door gets wind-driven rain. We pay most attention there.
Patio & French doors
Water at the foot of a door frame isn’t always the mastic: blocked drain slots, worn brush seals and threshold details can let water in too. We look for the cause first.