East Sussex · England
Window Mastic in Plumpton
Window and door frames in Plumpton need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Old mastic that has gone black or come away
- Gaps where the sill meets the wall
- Gaps between the frame and the inside reveal
About our window mastic in Plumpton
Around Plumpton we seal all kinds of frames: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. If you’re dealing with mastic that’s falling out in pieces and mastic that has split away from the wall, we can help, on timber windows & doors, window sills and patio & French doors alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Plumpton is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Whatever the size of the job, you get the same one-year guarantee.
- Location
- Plumpton (BN7)
- Wider area
- East Sussex
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Aftercare tips
To keep the joints looking good and working properly:
- Do not aim a pressure washer at the joints
- Walk round the house once a year and look at the joints
- Clear any debris from frame drain holes
- Keep paint and stain on wooden frames in good order
Keep the new mastic undisturbed while it cures, following the cure time we give you. Keep jet washers away from the frames.
Water trapped behind a failed joint can start rot in timber frames and sills. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
Places near Plumpton
Other services in Plumpton
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- A frame that has rotted at the joint
- A door that needs adjusting, rehanging or new seals
- A failed sealed unit that has misted up
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Surfaces we seal
- Timber windows & doors
- Window sills
- Patio & French doors
- uPVC windows
- Aluminium frames
- Composite doors
The process
When we arrive, we start by going over the job with you, so you know exactly what we are doing. We protect the surfaces around the joints before any work begins. The work generally takes a morning for a couple of windows and a door. Somewhere like Plumpton needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
How to prepare
- Let us know if you’ve seen damp or leaks
- On commercial sites, let us know about site rules
- Move anything stored near the joints
Get a quote
We quote each job on its own. Just phone 0345 464 0079 or email us with the details.
Advice
Plumpton: your questions answered
Can you help a landlord with a rental near Plumpton station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Is Plumpton in your area for window mastic?
Yes, Plumpton is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing, and we’ll send you a clear quote.
Do you work on first-floor windows?
Yes, where they can be reached safely. Let us know about access when you ask for a quote so we can plan the job.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
Does someone need to be in?
If the work is inside, we need someone to let us in. Once we have agreed the job, you do not need to watch us work.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Landlord and commercial work in Plumpton
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
For anyone letting property in or around Plumpton, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
When to call us in Plumpton
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.
The most common problems we see are:
- Damp patches on the reveal after heavy rain
- Rushed sealant from a window installation
- Cracked internal joints between frame and plaster
- Hard, cracked sealant around windows
Homes close to The Parish Church of St Michael and All Angels include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Questions to ask before you book
- How the surfaces are prepared before sealing
- Which colour the sealant will be
- How much experience the applicator has
- What product goes in the joint
Frames and glazing around Plumpton
With historic houses such as Anne of Cleves House (about 4 miles south-east) nearby, there’s older building stock in the area around Plumpton as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
Letting a property close to Plumpton station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Plumpton is about 4 miles north-west of Lewes, in East Sussex. Anywhere in BN7, we cover window mastic for homes and businesses. Across East Sussex, we cover 289 places, and Plumpton is one of them. Brighton is on our list too, around 6 miles away.
Every address in BN7 is within our area for window mastic. Streets in the area include Plumpton Lane and Ditchling Road. If you are just outside Plumpton, we cover East Chiltington (1 mile north-east), Streat (1 mile north-west), Chiltington (2 miles north-east), Plumpton Green (2 miles north) and Cooksbridge (2 miles east). Further out, we also cover Seaford (12 miles south-east), Lewes (4 miles south-east), Hailsham (14 miles east), Crowborough (14 miles north-east), Uckfield (8 miles north-east) and Newhaven (9 miles south-east).
Landmarks near Plumpton
Typical jobs here are in homes near The Half Moon Inn. Plumpton’s nearest station is Plumpton station, roughly 1.4 miles north of the centre. A little further out are Lewes Victoria Hospital (3.4 miles south-east) and Clayton Castle (3.7 miles west). For a walk, there’s Malling Down and Blackcap.
What the job involves on each surface
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the threshold joint takes a lot of water. We prepare and reseal every joint, backing the deep ones.
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the new bead is laid against the frame and the wall and tooled smooth.
Why it’s worth doing now in Plumpton
Choosing the product is half the job. Decorators’ caulk and bathroom silicone are not designed for outside joints that move. A low-modulus exterior sealant keeps its stretch through hot and cold weather. Around Plumpton, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Plumpton
- Fully insured
- A choice of colours where the product allows
- Trusted Arbo and Everbuild sealants
- Colour agreed with you before any work starts