East Sussex · England
Newbury's Window Mastic
Mastic around window and door frames, sills and patio doors for householders, landlords and businesses in Newbury's. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Leaking joints at the ends of sills
- Sealant in the wrong colour for the frame
- Untidy mastic left by window fitters
How we handle window mastic in Newbury's
Around Newbury's 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. We’re often asked to deal with leaking joints at the ends of sills and cold air getting in at the frame edge, across composite doors, patio & French doors and window sills.
Around Newbury's, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Big or small, you get the same one-year guarantee in Newbury's and across East Sussex.
- Location
- Newbury's (TN5)
- Wider area
- East Sussex
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlords, agents and businesses in Newbury's
We also work for property managers and facilities teams in Newbury's and across East Sussex. Several sites can go on one quote, and we are fully insured.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
What window mastic looks like in Newbury's
With historic houses such as Wadhurst Castle (about 1.5 miles south-west) nearby, there’s older building stock in the area around Newbury's 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. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For landlords with property near Wadhurst station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. If you live in an older home near Rehoboth Chapel, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Schools such as Uplands Community College are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Newbury's is about 5 miles south-east of Royal Tunbridge Wells, in East Sussex. Homes, rented property, offices and hotels in Newbury's is covered for window mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our East Sussex coverage runs to 289 places, and Newbury's is one of them. We also work in Crawley, around 24 miles away.
Every address in TN5 is within our area for window mastic. We also cover the places around Newbury's: Cousley Wood (1 mile south-east), Pell Green (1 mile south-west), Wadhurst (1 mile south-west), Birchett's Green (2 miles south-east) and Shover's Green (2 miles south). Further out, we also cover Crowborough (8 miles west), Uckfield (13 miles south-west), Heathfield (9 miles south-west), Upper Horsebridge (15 miles south), Hellingly (14 miles south) and Battle (13 miles south-east).
Local landmarks in Newbury's
We work in homes and buildings around The Old Vine Public House, among other places. For rail, the closest station is Wadhurst station, about 1.9 miles west. Nearby you’ll also find Ticehurst House Hospital (2.9 miles south-east) and Finchcocks Musical Museum (3.5 miles north-east). The countryside around Newbury's includes Bewl Water.
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Nearby places to Newbury's
What else we do in Newbury's
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Avoid blasting the frames with a pressure washer
- Look round the frames every year or so
- Air rooms to keep condensation down around windows
- Make sure the drainage slots are not blocked
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
When it is not the sealant
To be straight with you, some problems need a different trade:
- Soft or decayed wood in the frame
- Broken hinges, locks or handles
- A door that needs adjusting, rehanging or new seals
If in doubt, ring 0345 464 0079 or email us and we will say what we think before you book.
Joints and surfaces we work on
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- Composite doors
- uPVC windows
- Window sills
What happens on the day
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours for a few frames, or a day or more for a whole house. Somewhere like Newbury's 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.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Mention any tricky access
- Keep pets and children clear of the area while we work
- For indoor joints, keep the area dry beforehand if you can
Get a quote
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.
Advice
Common questions in Newbury's
Will you come out to Newbury's?
Yes, Newbury's is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near Wadhurst station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
How long before the joint can be used?
Cure times vary by product and the temperature. We tell you how long to leave it before we go.
Do you guarantee window mastic?
Yes. All our work carries a 12-month guarantee, and we’re ARBOMaster approved applicators.
Do you work on first-floor windows?
Yes, as long as they can be reached safely. Tell us about access when you get in touch and we’ll plan for it.
Can you get sealant to suit coloured frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available, so the joint suits the frame.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint.
Which products do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Why it’s worth doing now in Newbury's
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. Resealing now is a small job by comparison. Around Newbury's, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or email us and we will talk you through it.
Why Newbury's clients choose us
- Any old sealant cut out fully, not covered over
- A 12-month guarantee on all work
- Experience in homes, commercial sites and hotels
- Over 20 years’ experience
See what affects the cost and what customers say.
How we quote for window mastic
We quote each job individually. This is what makes a difference:
- Whether the work is at height
- When we can work, for business premises
- The type of sealant required
- Whether there’s mould to deal with
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and agree the price before starting.
What to tell us for a quote
To make quoting easier, please include:
- The problem you’ve noticed
- How many joints, rooms or windows are involved
- If someone has resealed it before
- Any access issues, like height or stairs
For a quote, call 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.