Brighton and Hove · England
Westdene Sand Mastic
Professional sand mastic in and around Westdene, with every bit of old sealant taken out first and a 12-month guarantee.
- Old cement repairs round a window that have failed
- Modern sealant on a period surround
- Mastic that needs renewing before redecorating
Sand mastic in Westdene
Across Westdene, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand, finished to suit the masonry. If you have gaps where the frame meets the masonry and patchy fillers round a sash window, we can put it right, whatever the surface.
Around Westdene, conservatories, garden rooms and patio doors are often part of the house. Their glazing joints and frame seals are as much a part of the job as the windows, and any older timber or sash windows need a sealant that suits them.
All our work comes with a one-year guarantee.
- Where
- Westdene (BN1, BN3)
- Region
- Brighton and Hove
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Westdene questions
Does the coastal weather in Westdene affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Is Westdene within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Will the old sealant be removed?
Yes, every time. New sealant won’t bond properly to old, so the joint is cleaned back first.
Where are you based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Should I try DIY first?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Can old silicone round a sash window be swapped for sand mastic?
Often, yes. Once the silicone is out and the joint prepared we point it with sand mastic.
Are you insured?
Yes. We are fully insured for every job we do.
How do I get a quote for sand mastic in Westdene?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or drop us an email and let us know what needs doing and where.
Nearby places to Westdene
More services for Westdene
What happens if it’s left?
New mastic over crumbling mastic will not hold. We remove the loose material first so the new mastic stays put. Around Westdene, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or drop us an email.
Why Westdene customers choose us
- Sanitary silicone with an anti-fungal additive in wet areas
- Old sealant always removed completely
- More than 20 years in sealant work
- Quality sealants from Arbo and Everbuild
Take a look at how sealant jobs are priced and what customers say.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
How it works
We bring everything the job needs with us, so you do not need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. Most jobs take anything from a few hours to a full day, depending on how many windows. A visit to Westdene is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Try not to wet indoor joints just before the visit
- Plan for the work area to be out of bounds to pets and children
- Clear items away from the joints we are working on
Getting a quote
If you are in Westdene and need sand mastic, ring 0345 464 0079 or send us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Read more
What sand mastic looks like in Westdene
Westdene is within about 3 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. 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 let a flat or house near Preston Park station, any sash windows need sound mastic to keep draughts and rain out. In the older streets around Church of the Ascension, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Westdene is about 2 miles north-east of Brighton and Hove, in Brighton and Hove. We provide sand mastic to homes and businesses in Westdene and nearby, as part of our work across Brighton and Hove. Westdene is one of 30 places in Brighton and Hove where we work.
Work in BN1 and BN3 is quoted and booked the same way as anywhere else. You will find streets such as Mill Road, Croft Road and London Road, all of which we cover. With the A27 close by, Westdene is simple for us to get to. If you are just outside Westdene, we cover Patcham (1 mile north-east), Withdean (1 mile south-east), Waterhall (1 mile north), Preston (1 mile south-east) and West Blatchington (1 mile south-west). Further out, we also cover Carlton Hill (3 miles south-east), Hanover (3 miles south-east), Kemptown (3 miles south-east), Whitehawk (3 miles south-east), Bevendean (3 miles south-east) and Saltdean (7 miles south-east).
What’s near Westdene
Typical jobs here are in homes near Varndean College, Withdean and Westdene Woods and The Sportsman pub, among other places. The nearest railway station is Preston Park station, roughly 1 mile south. Other landmarks nearby include Clayton Castle (3.5 miles north) and British Engineerium (1.2 miles south-west). Green spaces nearby include Ladies Mile and Wolstonbury Hill.
When it is not the sealant
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Sash cords, weights and draught-proofing of the sashes
- Decisions on consent for listed homes
- Decayed frames that need repair
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
What we seal
- Timber door frames
- Sash and case windows
- Period & listed homes
- Stone surrounds
- Brick reveals
- Tenement windows
Signs you need sand mastic in Westdene
Some old mastic was never deep enough. A thin layer does not hold well so we make sure the new mastic is the right thickness.
Look out for any of the following:
- Mastic round period door frames that has failed
- Weathered mastic on the most exposed windows
- Open joints round the window box
- Draughts and rain around sash boxes
Managing a site like Westdene Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- How long the guarantee is
- What insurance they hold
- How much experience the applicator has
- When the joint can take water or movement
What the job involves on each surface
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. We rake it out and renew it.
Brick reveals
Sand mastic is also used where timber frames meet brick. It suits older brickwork.
Landlords, agents and businesses in Westdene
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.