Kent · England
Window Mastic in Mersham
We cover Mersham for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- Sealant in the wrong colour for the frame
- Gaps where the sill meets the wall
- Gaps left after new windows were fitted
What happens on the day
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a morning for a couple of windows and a door. Somewhere like Mersham 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.
- First, we confirm safe access to each frame.
- 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.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Keep pets and children clear of the area while we work
- For indoor joints, keep the area dry beforehand if you can
- Move anything stored near the joints
Getting a quote
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
Window mastic in Mersham
Whether it’s one leaking patio door or every frame on the house, you’ll get a clear quote before work begins. To get one, phone 0345 464 0079 or send us an email with the number of frames and any access details. We work on timber windows & doors, patio & French doors and window sills, and common reasons people get in touch are mastic that’s falling out in pieces and untidy mastic left by window fitters.
Around Mersham, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Where
- Mersham (TN25)
- Region
- Kent
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
When something else is needed
To be straight with you, there are a few things sealant won’t fix:
- A failed sealed unit that has misted up
- Soft or decayed wood in the frame
- Penetrating damp from a failed cavity tray or render
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before you book.
Joints and surfaces we work on
- Aluminium frames
- uPVC windows
- Composite doors
- Timber windows & doors
- Window sills
- Patio & French doors
What the job involves on each surface
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.
Composite doors
Front doors take the weather head on, and the top and bottom corners tend to fail first. We pay most attention there.
Nearby places to Mersham
What else we do in Mersham
DIY versus a professional finish
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Keeping the joints in good condition
So the new joints stay in good condition:
- Don’t aim a pressure washer at the joints
- Air rooms to keep condensation down around windows
- Paint up to the joint, not over it
- Make sure the drainage slots are not blocked
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
Common questions in Mersham
Can you help a landlord with a rental near Ashford International station?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Do you cover Mersham for window mastic?
Yes. We work across London and the South East, and Mersham is part of that. Just call 0345 464 0079 or email us with a few details of the job.
What information do you need?
A short description and the location. If we need more, we’ll ask.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and we will quote it together.
Is the new sealant paintable?
Not generally, if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Which products do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
What we’re called out for in Mersham
Frames are never completely still. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the masonry beside it stays put. If the sealant can’t stretch, it splits.
Signs it’s time to call us include:
- Cold air getting in at the frame edge
- Gaps left after new windows were fitted
- Cracked sealant at the sill ends
- Gaps between the frame and the inside reveal
Homes close to Church of St John the Baptist include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- Is the old sealant removed completely?
- What product goes in the joint
- Which colour the sealant will be
- Whether they’re fully insured
How we quote for window mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How much old sealant there is and how hard it is to remove
- The type of sealant required
- How many areas need sealing
- Whether there’s mould to deal with
Doing several joints on one visit is normally more efficient than separate visits. You’ll get one clear quote for the whole job.
What we need to know
You do not need to know the technical terms. Just tell us:
- Access, such as stairs, a lift or height
- The address or postcode of the job
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work.
What window mastic looks like in Mersham
With historic houses such as Westenhanger Castle (about 4.7 miles east) nearby, there’s older building stock in the area around Mersham 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’s traditional sand mastic. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Managing a site like Mersham Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. Rented homes near Ashford International station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Mersham is about 3 miles south-east of Ashford, in Kent. If you need window mastic in Mersham, please call 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Kent, Mersham included. Our Kent coverage runs to 922 places, Mersham among them. Our Chelmsford page covers work nearby.
We cover every part of the TN25 postcode area for window mastic and the streets around it. Whether your property is on Church Road, The Street and Church Close or anywhere close by, our applicators can take on the job. Neighbouring places we cover for window mastic include Sevington (1 mile north-west), South Stour (1 mile south-west), Ridgeway (1 mile east), Hinxhill Park (2 miles north) and Smeeth (2 miles east). Within a short drive, we also cover Ashford (3 miles north-west), Canterbury (13 miles north-east), Folkestone (11 miles east), Faversham (14 miles north), Hythe (7 miles south-east) and Davington (14 miles north).
What’s near Mersham
We work in homes and buildings around The Farriers Arms and Poulton Wood, among other places. Mersham’s nearest station is Ashford International station, about 2.9 miles north-west. A little further out are Ashford Designer Outlet (2.6 miles north-west) and William Harvey Hospital (1.7 miles north-west). Open spaces near Mersham include Hatch Park.