Essex · England
Shenfield Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Shenfield and across Essex. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Mastic worn away on windows facing the weather
- Gaps between timber frames and stone or brick
- Patchy fillers round a sash window
Sand mastic in Shenfield, done properly
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. Renewing it closes the gap so the surround looks right again. We work on timber door frames, tenement windows and brick reveals, and people most often call us about weathered mastic on the most exposed windows and gaps round a timber door in stone or brick.
Houses in smaller places like Shenfield can stand more in the open than those in a built-up town, so exposed windows and doors face the weather head on. That’s hard on the mastic around frames and sills.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Location
- Shenfield (CM15, CM13)
- Wider area
- Essex
- Cover
- 12 months on all our work
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
FAQs for Shenfield
Will you come out to Shenfield?
Yes. Shenfield is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Shenfield station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Can I paint the new mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
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.
What is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
Is it possible to take out silicone and use sand mastic instead?
Usually, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
For landlords and businesses
Landlords and agents in Shenfield can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Do you need sand mastic in Shenfield?
Rain on the window surround works into any crack and loosens it further. Windows facing the weather tend to go first.
Any of these means the joints need attention:
- Window mastic to renew ahead of painting
- Cracked mastic round a front door frame
- A silicone bead on a sash window that spoils the look
- Draughty sash windows at the surround
For an older house near a landmark such as Church of St Mary the Virgin, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before you book
- Which sealant they’ll use, and why
- What guarantee comes with the work
- Whether all the old sealant comes out first
- What the cure time is
The process
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes anything from a few hours to a full day, depending on how many windows. Parking around Shenfield is usually easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Clear items away from the joints we are working on
- Let us know if you’ve seen damp or leaks
- Let us know about earlier repairs to the joints
Get a quote
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
Related advice
Sand mastic in Shenfield: local notes
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. Historic houses like Ingatestone Hall (about 3.8 miles north-east) are a reminder that the area around Shenfield has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you let a flat or house near Shenfield station, cracked sand mastic around sash windows lets in the draughts tenants complain about. For site and facilities teams at buildings such as Shenfield St. Mary's Church of England Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Shenfield is about 1 mile north-east of Brentwood, in Essex. Anywhere in CM15, we can carry out sand mastic at your property. Our Essex coverage runs to 644 places, Shenfield among them. For nearby work, see our Chelmsford page.
Our applicators cover all of CM15 and CM13 for sand mastic. You will find streets such as York Road, Hall Lane and Worrin Road, and we cover them all. Other places close to Shenfield include Brentwood (1 mile south-west), Hutton Mount (1 mile south-east), Hutton (2 miles east), Ingrave (2 miles south-east) and Mountnessing (2 miles north-east). Further out, we also cover Chelmsford (10 miles north-east), Basildon (7 miles south-east), Harlow (13 miles north-west), Canvey Island (14 miles south-east), Billericay (4 miles east) and Rayleigh (13 miles east).
Around Shenfield
Locally, jobs take us to homes and businesses close to Sawyers Hall College, Hutton Country Park and Shenfield High School and the streets around them. Shenfield’s nearest station is Shenfield station, about 0.5 miles east of the centre. Nearby you will also find Brentwood Community Hospital (0.5 miles south). Not far away are Thorndon Park.
Nearby places to Shenfield
More services for Shenfield
Why deal with it now?
Draughts round a sash window aren’t always the sashes. Gaps between the frame and the wall can be just as bad and new mastic seals them. Homes in smaller places like Shenfield can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Leaving a failed joint generally makes the job bigger, not smaller. If you are unsure, call 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Why us?
- An ARBOMaster approved applicator
- Rated 4.9 stars on Google
- Sanitary silicone with an anti-fungal additive in wet areas
- Tidy, careful work
See our cost guide and customer reviews.
What the job involves on each surface
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. We shape it by hand to follow the stone.
What sealant work cannot fix
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Cracked or broken glass
- Sashes that rattle, stick or won’t open
- Decayed frames that need repair
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
What we seal
- Brick reveals
- Stone surrounds
- Period & listed homes
- Timber door frames
- Tenement windows
- Sash and case windows
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.