Kent · England
Window Mastic in Larkfield
Mastic around window and door frames, sills and patio doors for Larkfield, backed by a 12-month guarantee. Call for a quick quote.
- Rushed sealant from a window installation
- Rain getting in at the frame or under the sill
- Sealant in the wrong colour for the frame
About our window mastic in Larkfield
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that can’t move properly, so we fit backing rod to set the right depth. That way the new bead bonds to the frame and the wall only. We work on aluminium frames, timber windows & doors and composite doors, and common reasons people get in touch are cracked or shrunken mastic around the frame and mastic that’s falling out in pieces.
Homes in small places like Larkfield often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
Our work is backed for twelve months, in Larkfield and everywhere else we cover.
- Place
- Larkfield (ME20, ME19)
- Wider area
- Kent
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What we’re called out for in Larkfield
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, and a gap filled solid can’t flex. Backing rod sets the right depth.
Common reasons people contact us include:
- Cracked internal joints between frame and plaster
- Cracked or shrunken mastic around the frame
- Cracked sealant at the sill ends
- Mastic that’s falling out in pieces
For site and facilities teams at buildings such as Brookfield Junior School, the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- Are they insured?
- How the joint is cleaned and prepared
- Is the old sealant removed completely?
- The length of the guarantee
Larkfield: your questions answered
Can you help a landlord with a rental near New Hythe station?
Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
Is Larkfield within the area you cover?
Yes. Larkfield is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Should I try DIY first?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Will new mastic stop draughts?
Yes, if the air is getting in around the frame. If it’s through the window’s own seals or a hinge, that’s a different fix, and we will say so.
Do you guarantee window mastic?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
Will there be a smell?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
What affects the cost of window mastic
There’s no set price list. What we look at:
- Whether there’s mould to deal with
- How many rooms, windows or areas are involved
- When we can work, for business premises
- Which sealant suits the joint
What it costs depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
Asking for a quote
Before you ask for a quote, have a think about:
- Access, such as stairs, a lift or height
- Where the property is
- A few pictures by email, if you can
- The type of property
If you are in Larkfield and need window mastic, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
When it is not the sealant
In fairness, there are a few things sealant won’t fix:
- Worn gaskets, brush seals or a door that has dropped
- A failed sealed unit that has misted up
- A frame that has rotted at the joint
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
Surfaces we seal
- Patio & French doors
- Timber windows & doors
- Composite doors
- uPVC windows
- Aluminium frames
- Window sills
How it works
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before work begins. The work generally takes anything from an hour or two to a full day, depending on how many frames there are. Somewhere as small as Larkfield, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Keep children and pets away from the work area
- Mention any leaks or damp you’ve noticed
Getting a quote
We quote each job on its own. Simply phone 0345 464 0079 or send us an email and describe the job.
Related advice
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Look round the frames every year or so
- Clean frames with a soft cloth and soapy water
- Keep paint and stain on wooden frames in good order
- Do not aim a pressure washer at the joints
Silicone can’t generally be painted, so if you’re planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. A new joint closes it up.
What else we do in Larkfield
What window mastic looks like in Larkfield
With historic houses such as Starkey Castle (about 4.3 miles north) nearby, there’s older building stock in the area around Larkfield 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. 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.
In the older streets around Church of the Holy Trinity, the joint between an old wall and a newer frame is usually the first place rain gets in. Rented homes near New Hythe station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Larkfield is about 4 miles north-west of Maidstone, in Kent. Our applicators cover window mastic for homeowners, landlords and businesses in Larkfield and the surrounding area, as part of our work across Kent. Larkfield is one of 922 places in Kent we cover. There’s also a page for London, roughly 27 miles from Larkfield.
We cover every part of ME20 and ME19 for window mastic. We cover properties on Martin Square, London Road and New Hythe Lane and the roads around them. Other places close to Larkfield include Lunsford (1 mile north), Leybourne (1 mile west), New Hythe (1 mile north-east), Birling (2 miles north-west) and Snodland (2 miles north). Within a short drive, we also cover Maidstone (4 miles south-east), Sittingbourne (13 miles east), Dartford (14 miles north-west), Sevenoaks (11 miles west), Royal Tunbridge Wells (14 miles south-west) and Gravesend (9 miles north).
What’s near Larkfield
Typical jobs here are in homes near The Malling School, The Malling School and Leybourne Lakes Country Park and the streets around them. Larkfield’s nearest station is New Hythe station, roughly 1 mile north-east. Other landmarks nearby include Fremlin Walk (3.9 miles south-east) and Leybourne Castle (0.9 miles west). Green spaces nearby include Burham Down and Blue Bell Hill.
DIY versus a professional finish
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 does not work out, we can still put it right.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Why it’s worth doing now in Larkfield
A cracked joint around a frame lets rain into the wall. Over time that can mean damp patches, damaged plaster and rotting timber. Resealing now is a small job by comparison. Around Larkfield, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- Colour agreed with you before work begins
- A 12-month guarantee on all work
- Fully insured
- Colour picked to suit the job