Kent · England
Lenham Forstal Window Mastic
Window and door frames in Lenham Forstal need attention? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Damp patches on the reveal after heavy rain
- Untidy mastic left by window fitters
- Draughty joints inside around the window
About our window mastic in Lenham Forstal
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. We’re often asked to deal with sealant in the wrong colour for the frame and cracked or shrunken mastic around the frame, across uPVC windows, timber windows & doors and patio & French doors.
Somewhere as small as Lenham Forstal, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
You get a 12-month guarantee, the same in Lenham Forstal as everywhere else we work.
- Place
- Lenham Forstal (ME17)
- Region
- Kent
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
We will not take on work that will not last, so these are the limits:
- Worn gaskets, brush seals or a door that has dropped
- Penetrating damp from a failed cavity tray or render
- Faulty window hardware
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly before you book.
Surfaces we seal
- Composite doors
- Window sills
- Patio & French doors
- Aluminium frames
- Timber windows & doors
- uPVC windows
Lenham Forstal homes and the weather
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near Church of the Holy Trinity, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Rented homes near Lenham station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Lenham Forstal is about 8 miles north-west of Ashford, in Kent. We carry out window mastic for homeowners, landlords and businesses in Lenham Forstal and the surrounding area. Our area takes in 922 places across Kent, large and small. Our Chelmsford page covers work nearby (37 miles or so).
Every address in ME17 is within our area for window mastic. Streets in the area include The Forstal, Mount Castle Lane and Burgess Fields, all of which we cover. Other places close to Lenham Forstal include Lenham Heath (1 mile south-east), Charing Heath (1 mile south-east), Stonebridge Green (1 mile south), Leadingcross Green (2 miles north-west) and Lenham (2 miles north-west). We also work in nearby towns such as 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).
Around Lenham Forstal
In Lenham Forstal, that means homes and buildings near Kiln Wood and the streets around them. The closest station to Lenham Forstal is Lenham station, roughly 1.7 miles north-west. Nearby you will also find Coldbridge Castle (2.3 miles south-west).
How we quote for window mastic
There’s no set price list. The quote depends on:
- The number and length of the joints
- The type of sealant required
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
What we need to know
Before you ask for a quote, have a think about:
- The rough size of the job
- Any previous sealing or DIY work
- Photos by email, if that’s easy
- Access, such as stairs, a lift or height
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work and send you a clear quote.
Different surfaces, different methods
Composite doors
Draughts round the door leaf normally come from worn seals or adjustment, not the mastic. We’ll tell you if that’s what we find.
Patio & French doors
Heavy door frames can move more than windows. A flexible sealant copes with that.
Common problems we fix in Lenham Forstal
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces never bonded as it should, and it lets go sooner than it should.
If you can see any of these, it’s time to have the joints looked at:
- A bead that doesn’t match the frame
- Black, perished sealant on frames
- Gaps between the frame and the inside reveal
- Draughts coming in around windows and doors
Managing a site like The Lenham School? Then larger buildings have plenty of frames, and the mastic around each one ages.
What your quote should include
- Is VAT in the price?
- What the cure time is
- What guarantee comes with the work
- Are they insured?
Towns and villages near Lenham Forstal
Also in Lenham Forstal
How the visit works
All our tools and materials come with us in the van. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours for a handful of frames, longer for a whole house. In a small place like Lenham Forstal, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Clear the area around the work
- For indoor joints, keep the area dry beforehand if you can
- Tell us if parking is tricky
Getting a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, ring 0345 464 0079 or drop us an email.
Related advice
Landlord and commercial work in Lenham Forstal
If you manage several properties in or around Lenham Forstal, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
We work for letting agents and landlords as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Why it’s worth doing now in Lenham Forstal
If you are painting or rendering, reseal at the same time. Fresh joints finish the job neatly. Where a wall is exposed, as many are in small places like Lenham Forstal, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why choose Mr Mastic in Lenham Forstal
- Trusted Arbo and Everbuild sealants
- 4.9 on Google from 180+ five-star reviews
- Homes, businesses and hotels
- 20+ years of sealant experience
See our cost guide or what customers say.
Lenham Forstal: your questions answered
Will you come out to Lenham Forstal?
Yes, Lenham Forstal is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
I let a flat near Lenham station. Can you help?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Will resealing my frames help with draughts?
If the draught is coming in around the frame, yes. If it’s through the window’s own seals or a hinge, that is a different fix, and we’ll say so.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.
Can I add another job to the visit?
Yes. Just list everything you need and we’ll quote it together.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used before we leave.
Can I paint over the new sealant?
That depends on the product. Silicone isn’t paintable, but some hybrid sealants are. Tell us if you are decorating and we’ll choose accordingly.