Kent · England
Window & door mastic in Lenham, Kent
Window mastic in Lenham from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Water coming in at the bottom corners of a door
- Black, perished sealant on frames
- Leaking joints at the ends of sills
How we handle window mastic in Lenham
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through. Where the air is getting in through the window itself, we will say so. If you’re dealing with rushed sealant from a window installation and cracked sealant at the sill ends, we can put it right.
Around Lenham, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows.
A one-year guarantee comes as standard, so you are covered after we have gone.
- Location
- Lenham (ME17)
- Region
- Kent
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Common problems we fix in Lenham
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar didn’t grip properly, so it comes away long before its time.
Signs it’s time to call us include:
- Leaking joints at the ends of sills
- Mastic that’s falling out in pieces
- Sealant in the wrong colour for the frame
- Untidy mastic left by window fitters
If you live in an older home near St Mary's Church, the joint between an old wall and a newer frame is normally the first place rain gets in.
Comparing quotes
- What the cure time is
- Which sealant they’ll use, and why
- Are they insured?
- Who does the work, and how experienced they are
What happens on the day
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The work itself takes a morning for a couple of windows and a door, including the tidy-up. For a job in Lenham, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- 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.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Move anything stored near the joints
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Want a quote for window mastic? Please phone 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
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Honest limits
Before booking, it’s worth knowing the limits:
- Soft or decayed wood in the frame
- Faulty window hardware
- A door that needs adjusting, rehanging or new seals
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly before you book.
Where we work in Lenham
- Composite doors
- Timber windows & doors
- Aluminium frames
- Window sills
- uPVC windows
- Patio & French doors
Places near Lenham
Other services in Lenham
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Lenham: your questions answered
Can you do window mastic in Lenham?
Yes. Our work covers London and the South East, and Lenham is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.
Do you cover smaller places like Lenham?
Yes. Lenham is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is it messy?
Tidy work is part of the job. Nearby surfaces are protected, and we clear up when we’re done.
Can you quote for more than one area?
Yes, we can. More than one area can go on one quote.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Do you work on first-floor windows?
Yes, as long as they can be reached safely. Let us know about access when you ask for a quote so we can plan the job.
Does the work come with a guarantee?
Yes. Each job is covered for 12 months, inside or out.
Can you get sealant to suit coloured frames?
Yes. Anthracite grey, black, brown and white cover most frames, with clear as an option.
Window mastic in Lenham: local notes
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Leeds Castle (about 3.6 miles west) are a reminder that the area around Lenham has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you look after a building such as Lenham Primary School, the mastic around its windows and doors needs looking after like any other building’s. Rented homes near Lenham station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Lenham is about 7 miles south of Sittingbourne, in Kent. Lenham gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Lenham is one of 922 towns and villages in Kent we cover for window mastic. Our Chelmsford page covers work nearby.
We work across the ME17 postcode area for window mastic and the streets around it. Streets in the area include High Street, Mitchell Close and Hatch Road, and we cover them all. Other places close to Lenham include Leadingcross Green (1 mile south), Woodside Green (1 mile north-east), West Street (1 mile north-east), Lenham Forstal (2 miles south-east) and Lenham Heath (2 miles south-east). We also work in nearby towns such as Maidstone (8 miles west), Ashford (9 miles south-east), Sittingbourne (7 miles north), Faversham (9 miles north-east), Minster (13 miles north) and Kings Hill (13 miles west).
Local landmarks in Lenham
Typical jobs here are in homes near Kiln Wood, The Red Lion pub and The Lenham School, among other places. There’s a railway station in Lenham itself: Lenham station. Nearby you will also find Coldbridge Castle (2.7 miles south) and The Dog Collar Museum (3.6 miles west).
Work for landlords, hotels and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
How we quote for window mastic
We don’t publish a price list, because jobs vary so much. The quote depends on:
- The number of rooms or windows
- The product the joint needs
- The number and length of the joints
- How much old sealant there is and how hard it is to remove
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The address or postcode of the job
- Roughly how big the job is
- How we’d reach the joints
- The type of property
There’s no standard price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Clear any debris from frame drain holes
- Wash the frames with mild soapy water
- Paint up to the joint, not over it
- Look round the frames every year or so
A yearly look round the frames is enough. Small splits are simple to catch before they leak.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.