Essex · England
Great Berry Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Great Berry. Fully insured, ARBOMaster approved and guaranteed for a year.
- Failed mastic on an exposed elevation
- Crumbling sand mastic round a window
- Mastic that needs renewing before redecorating
What happens if it’s left?
If you’re redecorating, renew the mastic first. Paint over cracked mastic will not stop the gaps, and the new mastic is traditionally left unpainted. Around Great Berry, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or send us an email.
Why choose Mr Mastic in Great Berry
- 12-month guarantee on every job
- Approved under the ARBOMaster scheme
- 20+ years of sealant experience
- Quality sealants from Arbo and Everbuild
See how sealant jobs are priced and our reviews.
About our sand mastic in Great Berry
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. Typical jobs include mastic worn away on windows facing the weather and old sand mastic that has cracked, crumbled or fallen out, across brick reveals, tenement windows and timber door frames.
Around Great Berry, 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.
There’s a 12-month guarantee on every job.
- Location
- Great Berry (SS16, SS15, CM13)
- Region
- Essex
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
Aftercare is simple:
- Check with your local planning authority if your home is listed
- Take care around the mastic when scraping paint
- Look over the window mastic once a year
- Renew mastic before redecorating the windows
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
An open joint round the box lets weather through. Left, the gap tends to get bigger as more mastic falls out.
Frames and glazing around Great Berry
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Laindon station, older sash windows in a rental need their mastic kept sound to keep the weather out. For site and facilities teams at buildings such as Great Berry Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Great Berry is about 2 miles west of Basildon, in Essex. From the centre of Great Berry to the outskirts, sand mastic is available for homes and businesses alike. 644 places in Essex are on our list. For nearby work, see our Chelmsford page.
Work in SS16, SS15 and CM13 works the same way as everywhere else we cover. Streets in the area include New Avenue, Coburg Lane and West Avenue, and we cover them all. Other places close to Great Berry include Langdon Hills (1 mile south-east), Laindon (1 mile north-east), Lee Chapel (2 miles east), Steeple View (2 miles north-east) and Basildon (2 miles east). We also work in nearby towns such as Chelmsford (12 miles north), Brentwood (6 miles north-west), Canvey Island (8 miles east), Billericay (4 miles north), Rayleigh (9 miles east) and Wickford (6 miles north-east).
Near you in Great Berry
Typical jobs here are in homes near Gloucester Park and The James Hornsby School, among other places. For rail, the closest station is Laindon station, roughly 0.7 miles east. A little further out are Basildon University Hospital (1.9 miles east) and Eastgate Shopping Centre (2.2 miles east). Open spaces near Great Berry include Langdon Nature Reserve.
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
Also near Great Berry
What else we do in Great Berry
Common problems we fix in Great Berry
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Most people get in touch when they notice one of these:
- Gaps round a timber door in stone or brick
- Weathered mastic on the most exposed windows
- Gaps where the frame meets the masonry
- Cement or filler used on old window joints that has cracked
In the older streets around St John, the joint between an old wall and a newer frame is normally the first place rain gets in.
What to look for in a quote
- How the joint is cleaned and prepared
- Whether they’re fully insured
- The length of the guarantee
- How much experience the applicator has
Honest limits
To be straight with you, there are a few things sealant won’t fix:
- Broken panes
- Timber that has rotted
- Whether work needs listed building consent
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Timber door frames
- Period & listed homes
- Sash and case windows
- Brick reveals
- Stone surrounds
- Tenement windows
Questions from Great Berry
Can you do sand mastic in Great Berry?
Yes. We work across London and the South East, and Great Berry is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Is Great Berry 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.
Do I need permission for sand mastic on a listed building?
It’s best to ask your local planning authority first. Like-for-like sand mastic is often the preferred finish, but they decide.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Can you match the sealant colour?
Yes. White, clear and grey are common, and other colours are available, and we will agree it with you first.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Can you replace silicone on a period window with sand mastic?
Yes. We remove the silicone and clean the joint, then point it with sand mastic.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
The process
A visit follows a simple pattern: we check the joints, protect the area around them, carry out the job and clear up. It normally takes anything from a few hours to a full day, depending on how many windows. Parking around Great Berry is generally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic isn’t too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
Before we arrive
- Move anything stored near the joints
- Plan for the work area to be out of bounds to pets and children
- Mention any leaks or damp you’ve noticed
Getting a quote
For a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
Related advice
How the job changes by surface
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.
Brick reveals
Loose mastic comes out and deep gaps are packed before the new mastic goes in.