Essex · England
Sand mastic for sash & case windows in Thaxted, Essex
Sand mastic for Thaxted, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Failed mastic on an exposed elevation
- Old cement repairs round a window that have failed
- Crumbling sand mastic round a window
Thaxted: your questions answered
Do you cover Thaxted for sand mastic?
Yes. We work across London and the South East, and Thaxted is part of that. You can phone 0345 464 0079 or email us and let us know what needs doing.
Is there a guarantee on sand mastic in Thaxted?
All our work, in Thaxted and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Is consent needed for window work on a listed home?
Your local planning authority is the one to ask. They decide whether consent is needed for work to your windows.
What do you need from me for a quote?
A short description and the location, plus photos if you have them. We will ask anything else we need to know.
Can sand mastic be painted?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Can landlords and businesses book you?
Yes, we do. We work in homes, commercial premises and hotels, and we’re fully insured.
How long will you be here?
As a guide, most jobs take anything from a few hours to a full day, depending on how many windows. Bigger jobs take longer.
How we handle sand mastic in Thaxted
Fresh sand mastic forms a skin quite soon but full hardening takes longer. Traditional guidance is not to paint over it and we will advise if you’re redecorating. Typical jobs include crumbling sand mastic round a window and patchy fillers round a sash window, on brick reveals, tenement windows and timber door frames.
Homes around Thaxted range from older properties to newer houses, and their windows range just as widely. The right sealant depends on the frame and on what it sits in.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Where
- Thaxted (CM6)
- Wider area
- Essex
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Check the mastic when you check the paintwork
- Keep sills and gutters clear so water drains away
- Find out about consent before window work on a listed home
- Take care around the mastic when scraping paint
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at rather than patching it.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
Frames and glazing around Thaxted
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Horham Hall (about 1.8 miles south-west) nearby, there’s older building stock in the area around Thaxted 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 live in an older home near Church of St John the Baptist, the joint between an old wall and a newer frame is generally the first place rain gets in.
Thaxted is about 6 miles south-east of Saffron Walden, in Essex. Our applicators cover sand mastic for homes and businesses in Thaxted, as part of our work across Essex. Our area takes in 644 places across Essex, large and small. We also work in Chelmsford, around 16 miles away.
All of CM6 is within our area for sand mastic, from the main roads to the quietest streets. If you need sand mastic at a property on The Lees, Weaverhead Lane and Wedow Road or a nearby road, our applicators can take on the job. You’ll find Thaxted on the B184 and B1051, which makes it straightforward to reach. If you are just outside Thaxted, we cover Cutlers Green (1 mile west), Bardfield End Green (1 mile east), Monk Street (1 mile south), Sibley's Green (2 miles south) and Howlett End (3 miles north-west). We also work in nearby towns such as Braintree (10 miles south-east), Saffron Walden (6 miles north-west), Halstead (12 miles east), Great Dunmow (6 miles south), Stansted Mountfitchet (7 miles south-west) and Great Notley (10 miles south-east).
Near you in Thaxted
In Thaxted, that means homes and buildings near Star Inn. Nearby you’ll also find Little Easton Moat (4.7 miles south). The countryside around Thaxted includes West Wood.
Should I try it myself first?
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What happens on the day
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours per window, depending on the condition of the joints. For a job in Thaxted, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Keep children and pets away from the work area
- Tell us about any water getting in
- Tell us about any previous sealing or DIY attempts
How to get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you’re ready, call 0345 464 0079 or email us.
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Landlord and commercial work in Thaxted
We also work for property managers and facilities teams. We can quote a run of properties together.
Letting agents and landlords in Thaxted can book us as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
What happens if it’s left?
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in and new mastic seals them. Around Thaxted, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
Combining jobs into one visit is normally more efficient than separate visits. You will get one clear quote for the whole job.
Why choose Mr Mastic in Thaxted
- Every job guaranteed for a year
- Sanitary silicone with an anti-fungal additive in wet areas
- Over 20 years’ experience
- Domestic, commercial and hotel work
Read what affects the cost or what customers say.
Places near Thaxted
Also in Thaxted
Common problems we fix in Thaxted
Water gets into small cracks in the mastic and loosens it further. Windows facing the weather tend to go first.
Any of these means the joints need attention:
- Mastic worn away on windows facing the weather
- Gaps between timber frames and stone or brick
- Crumbling sand mastic round a window
- Tired mastic found when preparing windows for paint
Schools such as Thaxted Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Before booking anyone
- Whether the sealant suits the joint
- Whether all the old sealant comes out first
- How hidden problems are handled
- How long the guarantee is
What we cannot put right
Before booking, it’s worth knowing the limits:
- Sashes that rattle, stick or will not open
- Broken panes
- Masonry that needs repairing
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Thaxted
- Timber door frames
- Tenement windows
- Stone surrounds
- Sash and case windows
- Brick reveals
- Period & listed homes