Essex · England
Sand mastic for sash & case windows in Smith's Green, Essex
We cover Smith's Green for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Old sand mastic that has cracked, crumbled or fallen out
- Mastic that needs renewing before redecorating
- Modern sealant on a period surround
Sand mastic for homes and businesses in Smith's Green
Silicone on a period window often looks wrong and does not suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. We work on period & listed homes, sash and case windows and tenement windows, and people most often call us about old cement repairs round a window that have failed and mastic that needs renewing before redecorating.
Around Smith's 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.
Whatever the size of the job, you get the same one-year guarantee in Smith's Green and across Essex.
- Place
- Smith's Green (CM6, CM22)
- Region
- Essex
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall so renewing it early protects the window. Where a wall is exposed, as many are in small places like Smith's Green, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why us?
- Anti-fungal silicone where joints get wet
- An ARBOMaster approved applicator
- Rated 4.9 stars on Google
- Over 20 years’ experience
See our cost guide or what customers say.
Towns and villages near Smith's Green
Other services in Smith's Green
Different surfaces, different methods
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
Common questions in Smith's Green
I let a flat near Stansted Airport station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Is Smith's Green 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 have to be there?
If the work is inside, we need someone to let us in. Once we’ve agreed the job, you don’t need to watch us work.
How much does sand mastic cost in Smith's Green?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before work begins.
How long does sand mastic take to go off?
The surface skins quite quickly and it hardens fully over a longer time. Timing depends on the weather and the joint.
Where is Mr Mastic based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What happens on the day
When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work begins. The work generally takes a few hours per window, depending on the condition of the joints. In a small place like Smith's Green, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Plan for the work area to be out of bounds to pets and children
- Let us know about parking restrictions
Getting a quote
If you’re in Smith's Green and need sand mastic, call 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Advice
What affects the quote in Smith's Green
You’ll get a clear quote before any work starts. It takes into account:
- Mould in or behind the old joints
- The old material and how stubborn it is
- How many areas need sealing
- How easy the joints are to reach
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
Helping us quote
To make quoting easier, let us know:
- Where the property is
- The type of property
- What’s wrong with the joints now
- How many joints, rooms or windows are involved
Asking for a quote is easy: tell us what needs doing and where and its rough size. Photos by email help us understand the job.
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Find out about consent before window work on a listed home
- Check the mastic when you check the paintwork
- Leave the new mastic unpainted
- Renew mastic before redecorating the windows
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
Landlords, agents and businesses in Smith's Green
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
When something else is needed
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Sashes that need overhauling
- Whether work needs listed building consent
- Damaged stone surrounds
If in doubt, phone 0345 464 0079 or email us and we will say what we think before booking.
Surfaces we seal
- Stone surrounds
- Sash and case windows
- Period & listed homes
- Tenement windows
- Brick reveals
- Timber door frames
Smith's Green homes and the weather
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Barrington Hall (about 2.6 miles south-west) nearby, there’s older building stock in the area around Smith's 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.
For site and facilities teams at buildings such as Takeley Primary School, its window and door frames need their mastic kept sound, just like a home’s. Rented homes near Stansted Airport station change hands often, and any sash windows need sound mastic to keep draughts and rain out. If you live in an older home near Church of the Holy Trinity, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Smith's Green is about 5 miles east of Bishop's Stortford, in Essex. Every kind of property in Smith's Green can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. Smith's Green is one of 644 places in Essex where we work for sand mastic. For nearby work, see our Chelmsford page (13 miles or so).
All of CM6 and CM22 is covered for sand mastic, from the main roads to the quietest streets. Whether your property is on Broadfield Road, The Oaks and Fleming Road or a nearby road, we can help. Nearby, we also carry out sand mastic in Little Canfield (1 mile east), Hope End Green (1 mile south), Takeley (1 mile west), Puttock's End (1 mile south) and Takeley Street (1 mile west). Further out, we also cover Chelmsford (13 miles south-east), Braintree (12 miles east), Harlow (10 miles south-west), Saffron Walden (11 miles north), Great Dunmow (3 miles east) and Epping (14 miles south-west).
Near you in Smith's Green
In Smith's Green, that means homes and buildings near Lion And Lamb Public House. The nearest railway station is Stansted Airport station, about 1.6 miles north-west. Other landmarks nearby include Little Easton Moat (2.6 miles north-east) and Herts and Essex Hospital (4.4 miles west). Open spaces near Smith's Green include Portingbury Hills and Aubrey Buxton Nature Reserve.