West Sussex · England
Newpound Common Window Mastic
Our applicators work in Newpound Common on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Gaps left after new windows were fitted
- Mastic that’s falling out in pieces
- Cracked internal joints between frame and plaster
What sealant work cannot fix
We won’t take on work that won’t last, so these are the limits:
- A door that needs adjusting, rehanging or new seals
- A sash or casement that won’t close properly
- A frame that has rotted at the joint
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Newpound Common
- Window sills
- Composite doors
- Aluminium frames
- Timber windows & doors
- Patio & French doors
- uPVC windows
How we handle window mastic in Newpound Common
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. The old mastic is removed and the joint resealed with a flexible exterior sealant. We work on patio & French doors, aluminium frames and uPVC windows, and common reasons people get in touch are white mastic on grey or black frames and black, perished sealant on frames.
In a village or hamlet like Newpound Common, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Newpound Common (RH14)
- Region
- West Sussex
- Cover
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Common problems we fix in Newpound Common
Every frame moves through the day. 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.
People usually contact us after spotting something like this:
- White mastic on grey or black frames
- Gaps between the frame and the inside reveal
- Leaking joints at the ends of sills
- Cold air getting in at the frame edge
Rented homes near Billingshurst 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.
Questions to ask before you book
- Whether they seal over old material or remove it
- What preparation is included
- Whether they’re fully insured
- Which sealant they’ll use, and why
What happens on the day
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a few frames, or a day or more for a whole house. In a small place like Newpound Common, access is generally 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.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
How to prepare
- Move anything stored near the joints
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
How to get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you are ready, phone 0345 464 0079 or send us an email.
Related advice
Towns and villages near Newpound Common
Also in Newpound Common
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
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.
Work for landlords, hotels and businesses
We work for letting agents and landlords as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured.
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Repaint timber before it’s bare
- Don’t use solvent cleaners on the joint
- Keep paint off silicone joints
- Wash the frames with mild soapy water
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. A new joint closes it up.
What happens if it’s left?
Failed mastic is not a reason to replace sound windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. If we find failed glass units or worn seals, we will tell you. Older cottages and farmhouses around Newpound Common can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and give you a clear quote before work begins.
What you get with us
- We agree the colour with you first
- Trusted Arbo and Everbuild sealants
- More than 20 years in sealant work
- A sealant colour to suit the surroundings
Read our cost guide or our reviews.
Newpound Common questions
Can you do window mastic in Newpound Common?
Yes. We work across London and the South East, and Newpound Common is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
Will you come out to Newpound Common?
Yes, Newpound Common is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Will it make a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Is the new sealant paintable?
Most silicone cannot be painted. Let us know beforehand, and we will use a paintable product where it suits.
Are you ARBOMaster approved?
Yes. We are an ARBOMaster approved applicator.
I rent my home. Can I book you?
Of course. Ask your landlord first, and we can send them the quote if that helps.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you.
Do you guarantee window mastic?
Yes, with our 12-month guarantee. Keeping drainage clear and checking the joints yearly helps them last.
Window mastic in Newpound Common: local notes
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around The Parish Church of St Peter Ad Vincula, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For site and facilities teams at buildings such as Wisborough Green Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Newpound Common is about 8 miles west of Horsham, in West Sussex. We provide window mastic to homes and businesses in Newpound Common. Our West Sussex coverage runs to 371 places, Newpound Common among them. Crawley is on our list too, about 14 miles from Newpound Common.
Jobs for window mastic in RH14 is quoted and booked the same way as anywhere else. Local streets include Newpound and Newpound Lane. If you are just outside Newpound Common, we cover Billingshurst (2 miles south-east), Five Oaks (3 miles east), The Haven (3 miles north-east), Coneyhurst (3 miles south-east) and Tisman's Common (4 miles north). Within a short drive, we also cover Crawley (14 miles north-east), Horsham (8 miles east), Worthing (15 miles south), Littlehampton (15 miles south), Rustington (15 miles south) and Broadfield (13 miles east).
Near you in Newpound Common
Around Newpound Common, our work takes us to homes and buildings near The Cricketers Arms Public House and The Weald School and the streets around them. For rail, the closest station is Billingshurst station, about 2.1 miles south-east of the centre. The countryside around Newpound Common includes The Mens.