Essex · England
Sand mastic for sash & case windows in Long Green, Essex
Sand mastic in Long Green from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Tired mastic found when preparing windows for paint
- Failed mastic on an exposed elevation
- Draughts and rain around sash boxes
About our sand mastic in Long Green
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It suits period and listed homes where a modern sealant bead would stand out. If you’re dealing with patchy fillers round a sash window and draughts and rain around sash boxes, we can help, on period & listed homes, brick reveals and tenement windows alike.
Mastic can only go onto a dry, clean joint, so window work in Long Green is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Your job is guaranteed for a year, as with all our work.
- Location
- Long Green (CM77)
- Region
- Essex
- Cover
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What affects the quote in Long Green
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Access and height
- How much there is to do
- Any working-time requirements on site
- The number of rooms or windows
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Helping us quote
You don’t need to know the technical terms. It helps if you can tell us:
- Roughly how big the job is
- How we’d reach the joints
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you are ready, ring 0345 464 0079 or send us an email.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Do not paint over the new mastic
- Go gently near the mastic when preparing windows
- Make sure water runs off the sill
- Get any rot dealt with first
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.
Common questions in Long Green
Do you work for landlords with property near Braintree Freeport station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can be quoted together. Just call 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Is Long Green in your area for sand mastic?
Yes. Our work covers London and the South East, and Long Green is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
How long does sand mastic take to harden?
It takes a while. The skin forms first, and the full set comes later, and we will tell you what to expect.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
What exactly is sand mastic?
Sand plus a binder based on linseed oil. It’s built up in the joint by hand and shaped to suit the surround.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Long Green.
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 getting the depth right matters as much as the look.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
When something else is needed
We will always be straight with you, so here’s what new sealant will not do:
- Putty and glazing repairs
- Sashes that need overhauling
- Timber that has rotted
If you’re not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
What we seal
- Brick reveals
- Period & listed homes
- Timber door frames
- Sash and case windows
- Tenement windows
- Stone surrounds
What happens on the day
Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a single window, longer for several. Somewhere as small as Long Green, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Before we arrive
- Move anything stored near the joints
- Keep children and pets away from the work area
- Let us know about earlier repairs to the joints
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Read more
Long Green homes and the weather
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as St Barnabas, the joint between an old wall and a newer frame is usually the first place rain gets in. Schools such as Cressing Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Braintree Freeport station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Long Green is about 2 miles south-east of Braintree, in Essex. Long Green gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Long Green is one of 644 towns and villages in Essex we cover for sand mastic. We also work in Chelmsford, around 10 miles away.
Here we cover the CM77 postcode area for sand mastic. If you need sand mastic at a property on Pine Road, Fir Drive and Long Green or a nearby road, our applicators can take on the job. Other places close to Long Green include Tye Green (1 mile south), Hawbush Green (1 mile south-east), Black Notley (1 mile south-west), The Green (1 mile south-west) and Braintree (2 miles north-west). We also work in nearby towns such as Colchester (13 miles east), Chelmsford (10 miles south-west), Maldon (10 miles south-east), Witham (5 miles south-east), Camulodunum (12 miles east) and Halstead (6 miles north).
What’s near Long Green
In Long Green, that means homes and buildings near Alec Hunter Academy, Bocking Blackwater and Fowlers Farm pub, among other places. The closest station to Long Green is Braintree Freeport station, about 0.8 miles west of the centre. Other landmarks nearby include William Julien Courtauld Hospital (2 miles west) and Tudor House Museum (Braintree) (2 miles north-west). The countryside around Long Green includes Belcher's and Broadfield Woods.
Places near Long Green
Other services in Long Green
Why deal with it now?
Draughts round a sash window aren’t always the sashes. Open mastic joints round the box can let air in, and renewing the mastic closes them. Older cottages and farmhouses around Long Green 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’s why we ask about the job first and send you a clear quote before we start.
Why us?
- Trusted Arbo and Everbuild sealants
- Domestic, commercial and hotel work
- Full insurance on every job
- Over 20 years’ experience
Take a look at how sealant jobs are priced or our reviews.