Kent · England
Window & door mastic in Sevenoaks, Kent
Specialist window mastic for Sevenoaks: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Gaps between the frame and the inside reveal
- White mastic on grey or black frames
- Gaps where the sill meets the wall
Common problems we fix in Sevenoaks
Joint shape matters as much as the product. A skim of sealant over a wide gap soon tears, while a joint packed solid can’t stretch. That’s what backing rod is for.
Look out for any of the following:
- Rushed sealant from a window installation
- Draughts coming in around windows and doors
- Draughty joints inside around the window
- Black, perished sealant on frames
If you let a flat or house near Sevenoaks station, renewing tired window mastic between tenants heads off draught and damp complaints.
What your quote should include
- Who turns up on the day
- What the quote includes, VAT included or not
- Are they insured?
- How hidden problems are handled
About our window mastic in Sevenoaks
Colour matters on a frame. White, brown, anthracite grey, black and clear sealants are all available, so the bead blends with the window rather than framing it. If you have leaking joints at the ends of sills and gaps between the frame and the inside reveal, we can help.
Sevenoaks mixes older streets, where windows have often been replaced, with newer estates fitted with uPVC. All of them depend on a sound bead of mastic between frame and wall.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or email us.
Also near Sevenoaks
Other services in Sevenoaks
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Paint up to the joint, not over it
- Keep drainage slots and sill grooves clear
- Ventilate rooms so frames do not stay wet inside
- Keep timber frames painted
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Leave it or put it right?
Not every sealant suits a window. Interior caulk and bathroom silicone aren’t made for exterior frame joints. A low-modulus exterior sealant keeps its stretch through hot and cold weather. Gaps in sealant and mould in the bead never get better on their own, and in a busy home in Sevenoaks they get worse with every use. Now is the easy time to put it right.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What you get with us
- Every job guaranteed for a year
- Any old sealant cut out fully, not covered over
- Sealant colour chosen to suit
- White, clear, grey or another colour, product permitting
Read what affects the cost or customer reviews.
Sevenoaks: your questions answered
Do you work for landlords with property near Sevenoaks station?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Is there a guarantee on window mastic in Sevenoaks?
Every job comes with our one-year guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Can you seal the gap between the frame and the plaster indoors?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We can do either or both.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
What do you put in the joint?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Can you match the sealant to my frames?
Yes. We can use white, brown, anthracite grey, black or clear, so the joint suits the frame.
What sealant work can’t fix
We’d rather tell you now than do work that won’t last, so these are the limits:
- Condensation trapped between the panes
- Damp problems in the wall away from the window
- Broken hinges, locks or handles
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Surfaces we seal
- Timber windows & doors
- Aluminium frames
- uPVC windows
- Patio & French doors
- Composite doors
- Window sills
Different surfaces, different methods
Window sills
Sills catch the water running down the glass, so the joints at each end and underneath matter. They’re cut out and resealed with exterior sealant.
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so they get particular care.
What affects the cost of window mastic
The price is agreed before any work begins. It’s based on:
- How many areas need sealing
- Any mould that needs treating
- The type of sealant required
- The size of the job
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- What’s wrong with the joints now
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
Want a quote for window mastic? Please ring 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
What window mastic looks like in Sevenoaks
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Knole House (about 1.3 miles south-east) nearby, there’s older building stock in the area around Sevenoaks as well as newer homes. 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.
Homes close to St John the Baptist include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in. If you look after a building such as Sevenoaks Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Sevenoaks is about 19 miles south-east of London, in Kent. Every kind of property in Sevenoaks can book us for window mastic. The work is guaranteed for a year. Sevenoaks is one of 922 places in Kent we cover for window mastic. London is on our list too, around 19 miles away.
All of TN13, TN14, TN15 and TN8 is covered for window mastic. Local streets include London Road, High Street and Church Road, all of which we cover. Being close to the A21 and A25, Sevenoaks is simple for us to get to for window mastic. Close by, we work in Riverhead (1 mile west), Kippington (1 mile south), Dunton Green (1 mile north-west), Bessels Green (1 mile west) and Chipstead (2 miles west). Larger places within reach include Maidstone (15 miles east), Dartford (11 miles north), Royal Tunbridge Wells (11 miles south), Gravesend (13 miles north-east), Tonbridge (7 miles south-east) and Northfleet (13 miles north-east). As one of the bigger places in Kent, Sevenoaks has homes, rented property and businesses of every kind.
Around Sevenoaks
Around Sevenoaks, our work takes us to homes and buildings near The Rifleman pub, New Beacon School and Knole Academy and the streets around them. There’s a railway station in Sevenoaks itself: Sevenoaks station. Nearby you’ll also find Sevenoaks Hospital (0.6 miles north-east) and Kemsing Castle Bank (2.6 miles north-east). The countryside around Sevenoaks includes Dryhill Nature Reserve.
What we do, step by step
Every visit runs the same way: we check the joints, protect the area around them, do the work and tidy away. Most jobs take a morning for a couple of windows and a door. Parking in a town like Sevenoaks is usually straightforward, but tell us if there’s a driveway or any restrictions, and mention if the work is upstairs, in a flat or high on the outside.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- 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.
How to prepare
- Mention if the joints have been sealed before
- Clear items away from the joints we are working on
- Mention any sign-in or site rules at work premises
How to get a quote
We do not publish a price list. Instead, we send you a clear quote for your job. To get started, phone 0345 464 0079 or send us an email.

