Kent · England
Window & door mastic in Addington, Kent
We cover Addington for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Rain getting in at the frame or under the sill
- Hard, cracked sealant around windows
- White mastic on grey or black frames
Should I try it myself first?
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.
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.
Window mastic in Addington, done properly
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. Typical jobs include hard, cracked sealant around windows and rain getting in at the frame or under the sill, on patio & French doors, uPVC windows and timber windows & doors.
Mastic can only go onto a dry, clean joint, so window work in Addington is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Every job is covered by our 12-month guarantee, wherever you are in Kent.
- Place
- Addington (ME19)
- Region
- Kent
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the quote in Addington
We don’t publish a price list, because jobs vary so much. The quote depends on:
- Whether there’s mould to deal with
- The type of sealant required
- The number of rooms or windows
- The amount of work
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or drop us an email and we will talk you through it.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
- What the problem is, such as mould, gaps, leaks or cracking
- Roughly how big the job is
Need a quote? Please ring 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and send you a clear quote before work begins.
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Keep drainage slots and sill grooves clear
- Use gentle cleaners on frames and sealant
- Wipe condensation off the frames
- Do not paint over the silicone
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
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.
Why it’s worth doing now in Addington
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. Older cottages and farmhouses around Addington can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before any work starts.
Why book with us
- A 12-month guarantee on all work
- Homes, businesses and hotels
- An ARBOMaster approved applicator
- 20+ years of sealant experience
See what affects the cost and what customers say.
Addington homes and the weather
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Old Soar Manor (about 3.9 miles south-west) nearby, there’s older building stock in the area around Addington as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Church of St Margaret, the joint between an old wall and a newer frame is generally the first place rain gets in. Letting a property close to West Malling station? Then renewing tired window mastic between tenants heads off draught and damp complaints. Managing a site like Offham Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Addington is about 7 miles north-west of Maidstone, in Kent. Wherever you are in the ME19 postcode area, we cover window mastic for homes and businesses. Our Kent coverage runs to 922 places, and Addington is one of them. You can also see our page for London, roughly 25 miles from Addington.
Here we cover the ME19 postcode area for window mastic. That includes homes and businesses on London Road, The Links and Trottiscliffe Road. Close by, we work in Ryarsh (1 mile north-east), Trottiscliffe (1 mile north-west), Vigo Village (2 miles north-west), Culverstone Green (3 miles north-west) and Harvel (3 miles north). We also work in nearby towns such as Maidstone (7 miles south-east), Sittingbourne (15 miles east), Dartford (12 miles north-west), Sevenoaks (9 miles west), Royal Tunbridge Wells (13 miles south-west) and Gravesend (9 miles north).
Landmarks near Addington
Typical jobs here are in homes near The Angel Inn, The Malling School and Manor Park Country Park. For rail, the closest station is West Malling station, about 1.8 miles south-east of the centre. A little further out are Coldrum Long Barrow (1.2 miles north) and Leybourne Castle (1.7 miles east).
Towns and villages near Addington
Other services in Addington
When it isn’t the sealant
Sealant is not the answer to every problem, and we’d rather say so up front. It will not solve:
- A door that needs adjusting, rehanging or new seals
- A frame that has rotted at the joint
- A failed sealed unit that has misted up
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Patio & French doors
- Aluminium frames
- Composite doors
- uPVC windows
- Window sills
- Timber windows & doors
How the visit works
You do not need to clear the whole room or building, only the area right around the joints. We protect the rest, and the work takes a few hours for a handful of frames, longer for a whole house for a typical job. Somewhere like Addington needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Move anything stored near the joints
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or drop us an email.
Advice
FAQs for Addington
Is Addington within the area you cover?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near West Malling station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Is it messy?
Tidy work is part of the job. We protect what’s around the joints.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint before we leave.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses.
Where is Mr Mastic based?
We work from Crawley. We cover Addington and the rest of Kent.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Landlords and letting agents in Addington can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.