Essex · England
Sand Mastic in Crow Green
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Crow Green and across Essex. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Mastic round period door frames that has failed
- Mastic worn away on windows facing the weather
- Gaps between timber frames and stone or brick
Sand mastic in Crow Green, done properly
Burnt sand mastic is a traditional material blends with stone and brick surrounds. It’s a good fit for period properties, where modern sealant can look out of place. Typical jobs include crumbling sand mastic round a window and open joints round the window box, on sash and case windows, period & listed homes and brick reveals.
Around Crow Green, 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.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Crow Green (CM15)
- Wider area
- Essex
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What we can’t put right
We will not take on work that won’t last, so here’s what sealant can’t put right:
- Decayed frames that need repair
- Decisions on consent for listed homes
- Sashes that need overhauling
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Timber door frames
- Period & listed homes
- Tenement windows
- Sash and case windows
- Brick reveals
- Stone surrounds
What sand mastic looks like in Crow Green
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Ingatestone Hall (about 4.4 miles east) nearby, there’s older building stock in the area around Crow Green as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
If you look after a building such as Larchwood Primary School, the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as Trinity Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Crow Green is about 2 miles north of Brentwood, in Essex. From the centre of Crow Green to the outskirts, sand mastic is available for homes and businesses alike. Our Essex coverage runs to 644 places, Crow Green among them. You can also see our page for Chelmsford, about 10 miles away.
Here we cover the CM15 postcode area for sand mastic. We also cover Pilgrims Hatch (1 mile south), Doddinghurst Common (1 mile north-west), Bentley (1 mile west), Kelvedon Hatch (1 mile north-west) and Coxtie Green (1 mile west). We also work in nearby towns such as Chelmsford (10 miles north-east), Basildon (9 miles south-east), Harlow (11 miles north-west), Canvey Island (15 miles south-east), Billericay (6 miles east) and Rayleigh (14 miles east).
Landmarks near Crow Green
Locally, jobs take us to homes and businesses close to Becket Keys Church of England School, Sawyers Hall College and Weald Country Park. The closest station to Crow Green is Shenfield station, about 2.1 miles south-east of the centre. Well-known places in the area include Brentwood Community Hospital (1.9 miles south-east). Green spaces nearby include Thorndon Park.
What happens on the day
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours for a single window, longer for several. Somewhere as small as Crow Green, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Mention if the joints have been sealed before
- For business premises, tell us about site rules or sign-in
- Let us know about stairs, lifts or work at height
How to get a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand.
Related advice
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Check the mastic when you check the paintwork
- Keep modern sealant off the mastic
- Get any rot dealt with first
- Renew mastic before redecorating the windows
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger as more mastic falls out.
When to call us in Crow Green
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows.
Signs it’s time to call us include:
- Old cement repairs round a window that have failed
- Mastic that needs renewing before redecorating
- Crumbling sand mastic round a window
- Gaps between timber frames and stone or brick
Letting a property close to Shenfield station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Questions to ask before you book
- Is the old sealant removed completely?
- Are they insured?
- What happens if they find a problem under the old sealant
- How the colour is chosen
Also near Crow Green
What else we do in Crow Green
Crow Green: your questions answered
Is Crow Green within the area you cover?
Yes. Crow Green is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
I let a flat near Shenfield station. Can you help?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. Then call 0345 464 0079 or email us.
Can you seal over the old sealant?
No, it won’t last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Do you have insurance?
Yes. Full insurance covers our work.
Where do you work from?
We work from Crawley. Our applicators cover Crow Green.
How long does sand mastic take?
As a guide, most jobs take a few hours for a single window, longer for several. Bigger jobs take longer.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
How the job changes by surface
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
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.