East Sussex · England
Window & door mastic in Mount Pleasant, East Sussex
Problem with your window and door frames in Mount Pleasant? We remove the old material, prepare the joints and seal them properly.
- Gaps left after new windows were fitted
- Rain getting in at the frame or under the sill
- Leaking joints at the ends of sills
Window mastic in Mount Pleasant
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. Common call-outs are for mastic that’s falling out in pieces and leaking joints at the ends of sills, across uPVC windows, patio & French doors and aluminium frames.
Mastic can only go onto a dry, clean joint, so window work in Mount Pleasant is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Place
- Mount Pleasant (BN8)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so the joint must stay flexible. We seal onto sound, dry paintwork or timber.
Patio & French doors
Water at the foot of a door frame isn’t always the mastic: blocked drain slots, worn brush seals and threshold details can let water in too. We look for the cause first.
FAQs for Mount Pleasant
Is Mount Pleasant in your area for window mastic?
Yes, Mount Pleasant is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job.
I let a flat near Cooksbridge station. Can you help?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Can you do the inside joint as well?
Yes. Indoors, we seal between the frame and the plaster or reveal.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Do you have insurance?
Yes. We are fully insured.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Will new mastic stop draughts?
If the draught is coming in around the frame, yes. If it’s through the window’s own seals or a hinge, that’s a different fix, and we will say so.
Places near Mount Pleasant
Also in Mount Pleasant
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
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 fails, we can still redo it.
Why act early in Mount Pleasant
Running fresh sealant over the old joint is tempting, but it won’t grip old, dirty sealant. It soon lifts and the leak carries on behind it. The old mastic has to come out. Older cottages and farmhouses around Mount Pleasant can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
What you get with us
- Domestic, commercial and hotel work
- You choose the colour before work begins
- Old sealant always removed completely
- Full insurance on every job
See our cost guide or customer reviews.
How it works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes anything from an hour or two to a full day, depending on how many frames there are from start to finish. Somewhere like Mount Pleasant needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, 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
- Tell us about any water getting in
- Keep pets and children clear of the area while we work
- Let us know about earlier repairs to the joints
Getting a quote
Want a quote for window mastic? Please phone 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Keep drainage slots and sill grooves clear
- Wipe condensation off the frames
- Check the mastic once a year
- Do not use solvent cleaners on the joint
Keep the new mastic undisturbed while it cures, following the cure time we give you. Do not point a pressure washer at the joints.
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 early resealing is worth it.
Landlord and commercial work in Mount Pleasant
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
What we are called out for in Mount Pleasant
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.
Signs it’s time to call us include:
- White mastic on grey or black frames
- Gaps left after new windows were fitted
- Damp patches on the reveal after heavy rain
- Black, perished sealant on frames
For landlords with property near Cooksbridge station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
What to look for in a quote
- Which colour the sealant will be
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- Is VAT in the price?
Mount Pleasant homes and the weather
With historic houses such as Glyndebourne (about 4.1 miles south-east) nearby, there’s older building stock in the area around Mount Pleasant 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. 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 look after a building such as Barcombe Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as St Bartholomews, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Mount Pleasant is about 4 miles north of Lewes, in East Sussex. Whether you’re in the middle of Mount Pleasant or further out, we cover window mastic for every kind of property. We cover 289 towns and villages across East Sussex, large and small. Brighton is on our list too, around 10 miles away.
Our applicators cover all of BN8 for window mastic and the streets around it. Other places close to Mount Pleasant include Barcombe Cross (1 mile south-west), Barcombe Mills (1 mile south), Barcombe (1 mile south), Isfield (2 miles east) and Upper Wellingham (2 miles south). Larger places within reach include Eastbourne (15 miles south-east), Seaford (11 miles south), Lewes (4 miles south), Hailsham (11 miles south-east), Crowborough (10 miles north-east) and Uckfield (4 miles north-east).
Near you in Mount Pleasant
In Mount Pleasant, that means homes and buildings near Royal Oak pub and Chailey School and the streets around them. For rail, the closest station is Cooksbridge station, about 2.5 miles south-west. Well-known places in the area include Museum of Agricultural Bygones (3.9 miles south-east) and Uckfield Community Hospital (4.2 miles north-east). Open spaces near Mount Pleasant include Offham Hill and Malling Down.