Essex · England
Great Yeldham Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Great Yeldham and across Essex. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Mastic that needs renewing before redecorating
- Weathered mastic on the most exposed windows
- Draughts and rain around sash boxes
Sand mastic in Great Yeldham
On many period windows, sand mastic looks right and suits the building. Newer frames normally get a flexible sealant instead and we’ll explain which is best for yours. We work on stone surrounds, timber door frames and period & listed homes, and people most often call us about gaps round a timber door in stone or brick and open joints round the window box.
Somewhere as small as Great Yeldham, 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.
We stand behind the work with a one-year guarantee, so you are not left on your own once the job is done.
- Where
- Great Yeldham (CO9)
- Wider area
- Essex
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
How the visit works
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself normally takes a few hours per window, depending on the condition of the joints, depending on the size of the job. In a small place like Great Yeldham, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any sign-in or site rules at work premises
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Related advice
What we are called out for in Great Yeldham
Most of it is simply age. Even well-laid mastic needs renewing in time and how long it lasts depends on the weather it faces.
The most common problems we see are:
- Cracked mastic round a front door frame
- Draughty sash windows at the surround
- Modern sealant on a period surround
- Weathered mastic on the most exposed windows
In the older streets around Parish Church of St Andrew, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Comparing quotes
- Which colour the sealant will be
- Is the old sealant removed completely?
- What the cure time is
- How much experience the applicator has
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Go gently near the mastic when preparing windows
- Have rotten timber repaired before new mastic goes in
- Check with your local planning authority if your home is listed
- Leave the new mastic unpainted
Don’t run silicone over the new mastic. If anything cracks, get it looked at rather than patching it.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Sand mastic in Great Yeldham: local notes
Historic houses like Hedingham Castle (about 2.3 miles south-east) are a reminder that the area around Great Yeldham has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as St Andrew's Church of England Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Great Yeldham is about 6 miles north-west of Halstead, in Essex. For sand mastic in and around Great Yeldham, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Essex from our Crawley base. Great Yeldham is one of 644 places in Essex we cover. There’s also a page for Chelmsford, about 20 miles away.
All of CO9 is within our area for sand mastic, from the main roads to the quietest streets. Whether your property is on Church Road, Market Grove and High Street or a nearby road, our applicators can take on the job. Other places close to Great Yeldham include Oaker Hill (1 mile north-west), Tilbury Juxta Clare (1 mile north), Little Yeldham (1 mile north-east), Toppesfield (2 miles south-west) and Ridgewell (2 miles north-west). We also work in nearby towns such as Braintree (9 miles south), Witham (15 miles south), Saffron Walden (14 miles west), Halstead (6 miles south-east), Great Dunmow (13 miles south-west) and Great Notley (11 miles south).
Near you in Great Yeldham
In Great Yeldham, that means homes and buildings near The Three Bottles Public House and Hedingham School and Sixth Form and the streets around them. Other landmarks nearby include Halstead Hospital (5.7 miles south-east) and Hedingham Castle (2.3 miles south-east).
What affects the quote in Great Yeldham
We do not publish a price list, because jobs vary so much. What we look at:
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
- The product the joint needs
- The old material and how stubborn it is
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Any previous sealing or DIY work
- Where the property is
- How we’d reach the joints
- The rough size of the job
Every job is quoted individually. Just call 0345 464 0079 or drop us an email with the details and send photos if you have them.
Leave it or put it right?
Not every filler suits an old window surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. In a small place like Great Yeldham, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why book with us
- ARBOMaster approved applicator
- 4.9 on Google from 180+ five-star reviews
- We leave the area clean and tidy
- Any old sealant cut out fully, not covered over
Take a look at what affects the cost and customer reviews.
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.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Great Yeldham questions
Is there a guarantee on sand mastic in Great Yeldham?
Every job comes with our 12-month guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Can you do sand mastic in Great Yeldham?
Yes, Great Yeldham is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
What exactly is sand mastic?
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 new sealant go over the old?
No, it will not last. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
Do I need to be at home?
If the work is inside, we need someone to let us in. Once we’ve agreed the job, you do not need to watch us work.
What do you need from me for a quote?
Let us know what needs doing and where, plus photos if you have them. If we need more, we will ask.
Do you offer different sealant colours?
Most of the time, yes. We will tell you which colours the right product comes in.
Also near Great Yeldham
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For landlords and businesses
If you manage several properties in or around Great Yeldham, several properties can be quoted together. Just tell us the addresses and what each one needs.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.