Kent · England
Window Mastic in Lenham Heath
Window mastic for Lenham Heath, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Sealant in the wrong colour for the frame
- Rain getting in at the frame or under the sill
- Old mastic that has gone black or come away
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
How we handle window mastic in Lenham Heath
From a single sill to a whole house of windows, the work is priced before anything is done. Just call 0345 464 0079 or send us an email and tell us how many frames there are and how they’re reached. Common call-outs are for whistling draughts around closed windows and a bead that doesn’t match the frame, on patio & French doors, aluminium frames and window sills.
Outdoor sealant needs dry, clean surfaces, so work on frames around Lenham Heath is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Lenham Heath (ME17)
- Wider area
- Kent
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Common problems we fix in Lenham Heath
Frames are never completely still. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. A sealant that can’t keep up eventually tears.
People generally contact us after spotting one of these:
- Cracked sealant at the sill ends
- Hard, cracked sealant around windows
- Black, perished sealant on frames
- Gaps between the frame and the inside reveal
For an older house near a landmark such as Church of the Holy Trinity, the joint between an old wall and a newer frame is generally the first place rain gets in.
Comparing quotes
- Whether the sealant suits the joint
- What preparation is included
- When the joint can take water or movement
- What guarantee comes with the work
Why act early in Lenham Heath
If you’re painting or rendering, reseal at the same time. A clean new bead makes new paint or render look finished, and it’s easier while the walls are being worked on anyway. Older cottages and farmhouses around Lenham Heath can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us and we’ll talk you through it.
Why choose Mr Mastic in Lenham Heath
- ARBOMaster approved applicator
- Old sealant always removed completely
- Over 20 years’ experience
- We’re fully insured
Take a look at our cost guide or what customers say.
Places near Lenham Heath
What else we do in Lenham Heath
Landlord and commercial work in Lenham Heath
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Quotes for window mastic in Lenham Heath
The price is agreed before any work begins. It’s based on:
- How easy the joints are to reach
- The number and length of the joints
- When we can work, for business premises
- The type of sealant required
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
What we need to know
You do not need to know the technical terms. Just tell us:
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- Access, such as stairs, a lift or height
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved and send you a clear quote.
Common questions in Lenham Heath
Do you cover Lenham Heath for window mastic?
Yes, Lenham Heath is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
I let a flat near Lenham station. Can you help?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
What information do you need?
Let us know what needs doing and where. We’ll ask anything else we need to know.
Do you seal inside as well as outside?
Yes. Plenty of draughts come through the inside joint as well as the outside, so it can be worth sealing both.
How long will my window job take?
It depends on access, the old mastic and the size of the frames. We’ll tell you how long your job needs when we quote.
Do I need to be at home?
It depends on the job. Inside work needs someone to give us access, and for outside work we’ll agree access with you when we book.
Can resealing stop a draught around my window?
Yes, where the draught is at the frame edge. We check where the draught is before we start.
Where are you based?
We work from Crawley. We cover Lenham Heath and the rest of Kent, along with the rest of our area.
Window mastic in Lenham Heath: local notes
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 landlords with property near Lenham station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Managing a site like The Lenham School? Then its window and door frames need their mastic kept sound, just like a home’s.
Lenham Heath is about 8 miles north-west of Ashford, in Kent. Wherever you are in the ME17 postcode area, we can carry out window mastic at your property. Across Kent, we cover 922 places, Lenham Heath among them. For nearby work, see our Chelmsford page, about 38 miles away.
Work in ME17 is quoted and booked the same way as anywhere else. You will find streets such as Lenham Forstal Road, Crabtree Lane and Rose Lane, and we cover them all. Nearby, we also carry out window mastic in Lenham Forstal (1 mile north-west), Charing Heath (1 mile south-east), Stonebridge Green (1 mile south), Leadingcross Green (2 miles north-west) and Lenham (2 miles north-west). Further out, we also cover Maidstone (10 miles west), Ashford (8 miles south-east), Canterbury (15 miles east), Sittingbourne (9 miles north), Faversham (9 miles north-east) and Minster (14 miles north).
What’s near Lenham Heath
Around Lenham Heath, our work takes us to homes and buildings near The Red Lion Inn. The nearest railway station is Lenham station, about 2 miles north-west. A little further out are Coldbridge Castle (2.4 miles south-west).
How it works
Before we leave, we go over the finished joints with you. The visit itself usually takes a few hours for a few frames, or a day or more for a whole house, depending on the size of the job. Somewhere as small as Lenham Heath, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Let us know about parking restrictions
- Where the joints are inside, avoid wetting them before we arrive
- For business premises, tell us about site rules or sign-in
Get a quote
We do not publish a price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or send us an email.
Read more
Looking after it afterwards
So the new joints stay in good condition:
- Walk round the house once a year and look at the joints
- Ventilate rooms so frames don’t stay wet inside
- Use gentle cleaners on frames and sealant
- Do not use solvent cleaners on the joint
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.