Essex · England
Sand mastic for sash & case windows in Patching, Essex
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Patching, with a 12-month guarantee on every job. Call for a quick quote.
- Modern sealant on a period surround
- Weathered mastic on the most exposed windows
- Cracked mastic round a front door frame
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
For anyone letting property in or around Patching, several properties can be quoted together. Send us the addresses and the work at each.
Sand mastic for homes and businesses in Patching
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. Renewing it closes the gap and tidies the surround. Common call-outs are for old cement repairs round a window that have failed and old sand mastic that has cracked, crumbled or fallen out, on stone surrounds, brick reveals and tenement windows.
In smaller places like Patching, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
You are covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or email us.
- Location
- Patching (CM1)
- Region
- Essex
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Leave it or put it right?
New mastic over crumbling mastic will not hold. We remove the loose material first so the new work lasts. In an older home around Patching, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will go through it with you.
Why choose Mr Mastic in Patching
- Any old sealant cut out fully, not covered over
- Approved under the ARBOMaster scheme
- Trusted Arbo and Everbuild sealants
- Fully insured
Take a look at our cost guide and our reviews.
Sand mastic in Patching: local notes
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Hylands (about 3 miles south-west) are a reminder that the area around Patching has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Historic houses such as Hylands, about 3 miles south-west, show how far back building around Patching goes. Rented homes near Chelmsford station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Patching is about 1 mile north-west of Chelmsford, in Essex. Every kind of property in Patching is covered for sand mastic. The work is guaranteed for a year. Patching is one of 644 towns and villages in Essex where we work.
Postcode districts we cover here for sand mastic: CM1. That includes homes and businesses on First Avenue, Sixth Avenue and Fifth Avenue. Patching sits on or near the A1016, which makes travel easy. Other places close to Patching include Chelmsford (1 mile south-east), Broomfield (2 miles north), Moulsham (2 miles south), Chignall St James (2 miles west) and Writtle (2 miles south-west). Within a short drive, we also cover Basildon (12 miles south), Braintree (10 miles north-east), Harlow (15 miles west), Brentwood (11 miles south-west), Maldon (9 miles east) and Billericay (9 miles south).
Landmarks near Patching
In Patching, that means homes and buildings near The Red Beret pub, Chelmer Valley Riverside and St Pius X Catholic Primary School and the streets around them. For rail, the closest station is Chelmsford station, about 1 mile south. Other landmarks nearby include Bond Street Chelmsford (1.2 miles south) and Priory Hospital (1 mile south-east). For a walk, there’s Newland Grove.
Different surfaces, different methods
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. We rake it out and renew it.
Sash and case windows
Most of our sand mastic work is on sash windows. Each joint round the box is raked out and renewed.
What affects the cost of sand mastic
You will get a clear quote before work begins. It takes into account:
- When we can work, for business premises
- Whether there’s mould to deal with
- The product the joint needs
- How many rooms, windows or areas are involved
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
What to tell us for a quote
To make quoting easier, please include:
- Any access issues, like height or stairs
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, phone 0345 464 0079 or send us an email.
DIY sealant or a professional job?
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.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What we do, step by step
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a single window, longer for several. For a job in Patching, 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.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Mention any parking rules near the property
- Mention any tricky access
- Mention if the joints have been sealed before
How to get a quote
We don’t publish a price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, call 0345 464 0079 or email us.
Read more
When to call us in Patching
Paint, silicone or cement used over old mastic causes problems. They do not move with the timber and we normally remove them.
Most people get in touch when they notice something like this:
- Modern sealant on a period surround
- Draughts and rain around sash boxes
- Crumbling sand mastic round a window
- Open joints round the window box
For site and facilities teams at buildings such as St John Payne Catholic School, its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before booking
- Whether all the old sealant comes out first
- What guarantee comes with the work
- Whether VAT is included
- Whether you can choose the colour
Also near Patching
More services for Patching
Questions from Patching
Can you help a landlord with a rental near Chelmsford station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover smaller places like Patching?
Yes. Patching 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.
What guarantee comes with the work?
Every job comes with our one-year guarantee.
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.
Which is right for my windows, sand mastic or modern sealant?
It depends on the window. Period windows in stone or brick normally suit sand mastic and newer frames usually get a flexible sealant.
Can sand mastic be painted?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.