Essex · England
Sand mastic for sash & case windows in Green Street, Essex
Professional sand mastic in and around Green Street, with every bit of old sealant taken out first.
- Mastic that needs renewing before redecorating
- Modern sealant on a period surround
- Gaps where the frame meets the masonry
About our sand mastic in Green Street
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. We work on tenement windows, stone surrounds and sash and case windows, and the jobs we see most are a silicone bead on a sash window that spoils the look and draughts and rain around sash boxes.
Somewhere as small as Green Street, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
All of our work is guaranteed for twelve months.
- Place
- Green Street (CM4)
- Region
- Essex
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How it works
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take a few hours per window, depending on the condition of the joints. Somewhere like Green Street needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Mention any parking rules near the property
- For business premises, tell us about site rules or sign-in
- Tell us about any water getting in
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Advice
Common questions in Green Street
Do you cover smaller places like Green Street?
Yes, Green Street is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Ingatestone station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint.
What’s sand mastic made of?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and shaped to suit the surround.
Can I paint the new mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
Can I add another job to the visit?
Yes. More than one area can be quoted together.
Where are you based?
We are based in Crawley, and we cover South East England, London and all of Scotland.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
Why it’s worth doing now in Green Street
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. Older cottages and farmhouses around Green Street can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Why Green Street clients choose us
- We never seal over old sealant
- 180+ five-star Google reviews
- ARBOMaster approved applicator
- One-year guarantee on every job
Read what affects the cost or what customers say.
What affects the cost of sand mastic
Your quote is based on your job. We look at:
- When we can work, for business premises
- The number and length of the joints
- The old material and how stubborn it is
- Mould in or behind the old joints
Doing several joints on one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Helping us quote
To make quoting easier, please include:
- The rough size of the job
- Any access issues, like height or stairs
- Where the job is, and your postcode
- Any previous sealing or DIY work
For a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. We will send you a clear quote before any work starts.
Frames and glazing around Green Street
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Ingatestone Hall (about 1.9 miles south-east) are a reminder that the area around Green Street has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Church of St Mary the Virgin, frames set in older brick or stone need a sealant that suits the wall as well as the frame. For site and facilities teams at buildings such as Ingatestone Infant School, the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Ingatestone station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Green Street is about 4 miles north-east of Brentwood, in Essex. Green Street gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Across Essex, we cover 644 places, and Green Street is one of them. You can also see our page for Chelmsford, about 7 miles away.
Work in CM4 works the same way as everywhere else we cover. Other places close to Green Street include Beggar Hill (1 mile north), Fryerning (1 mile east), Swallows Cross (1 mile south-west), Mill Green (1 mile north-east) and Ingatestone (1 mile east). Further out, we also cover Chelmsford (7 miles north-east), Basildon (8 miles south-east), Harlow (12 miles north-west), Brentwood (4 miles south-west), Maldon (15 miles east) and Canvey Island (14 miles south-east).
Landmarks near Green Street
Around Green Street, our work takes us to homes and buildings near Anglo European School, among other places. The nearest railway station is Ingatestone station, about 1.5 miles east of the centre. A little further out are Brentwood Community Hospital (3.8 miles south-west). Green spaces nearby include Norsey Wood.
Should I try it myself first?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Also near Green Street
What else we do in Green Street
How the job changes by surface
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. The method is the same as for windows.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
What sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- Masonry that needs repairing
- Sashes that rattle, stick or will not open
- Decayed frames that need repair
If you’re not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
Where we work in Green Street
- Tenement windows
- Brick reveals
- Timber door frames
- Stone surrounds
- Period & listed homes
- Sash and case windows
Landlord and commercial work in Green Street
If you manage several properties in or around Green Street, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.