Essex · England
Sand mastic for sash & case windows in Moulsham, Essex
We cover Moulsham for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Draughts and rain around sash boxes
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps where the frame meets the masonry
About our sand mastic in Moulsham
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. If you’re dealing with tired mastic found when preparing windows for paint and gaps between timber frames and stone or brick, we can put it right, whatever the surface.
Houses in smaller places like Moulsham can stand more in the open than those in a built-up town. That is hard on the mastic around frames and sills.
Every job is covered by our one-year guarantee.
- Where
- Moulsham (CM2, CM1)
- Region
- Essex
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
What affects the quote in Moulsham
For a quick quote, just ask. The main things that affect it are:
- Access and height
- How much there is to do
- The number of rooms or windows
- The product the joint needs
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
What to tell us for a quote
To make quoting easier, let us know:
- Photos by email, if that’s easy
- The type of property
- Where the property is
- What’s wrong with the joints now
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you’re ready, phone 0345 464 0079 or email us.
Why deal with it now?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry so renewing it early protects the window. Homes in smaller places like Moulsham 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.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Why choose Mr Mastic in Moulsham
- 20+ years of sealant experience
- Trusted Arbo and Everbuild sealants
- Domestic, commercial and hotel work
- We never seal over old sealant
Take a look at our cost guide and customer reviews.
What we cannot put right
We will not take on work that won’t last, so here’s what sealant cannot put right:
- Cracked or broken glass
- Rotten sashes, sills or window boxes (a joiner’s job)
- Masonry that needs repairing
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Where we work in Moulsham
- Period & listed homes
- Timber door frames
- Sash and case windows
- Brick reveals
- Tenement windows
- Stone surrounds
Towns and villages near Moulsham
Other services in Moulsham
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, 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.
Questions from Moulsham
Can you do sand mastic in Moulsham?
Yes, Moulsham is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing.
Can you help a landlord with a rental near Chelmsford station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
Will there be a smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Is it possible to paint over sand mastic?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We will tell you what we are using and why.
Can you do several jobs on one visit?
Yes, we can. More than one area can go on one quote.
Do I need permission for sand mastic on a listed building?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like, but they decide.
What do you need from me for a quote?
A short description and the location. If we need more, we’ll ask.
What we are called out for in Moulsham
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows.
Any of these means the joints need attention:
- Draughts and rain around sash boxes
- Cracked mastic round a front door frame
- Weathered mastic on the most exposed windows
- Old sand mastic that has cracked, crumbled or fallen out
Letting a property close to Chelmsford station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Questions to ask before booking
- Which colour the sealant will be
- Whether they’re fully insured
- What the cure time is
- Whether all the old sealant comes out first
Moulsham homes and the weather
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Hylands (about 1.7 miles south-west) are a reminder that the area around Moulsham 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.
If you look after a building such as Our Lady Immaculate Catholic Primary School, larger buildings have plenty of frames, and the mastic around each one ages. For an older house near a landmark such as Church of St John the Evangelist, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Moulsham is about 1 mile south-west of Chelmsford, in Essex. Homes, rented property, offices and hotels in Moulsham can book us for sand mastic. The work is guaranteed for a year. 644 places in Essex are on our list, from the larger towns to small villages.
Every address in CM2 and CM1 is within our area for sand mastic. Streets in the area include Elm Road, York Road and Lady Lane. Moulsham sits on or near the A1060 and A1099, which makes travel easy. Neighbouring places we cover for sand mastic include Chelmsford (1 mile north-east), Widford (1 mile south-west), Patching (2 miles north), Writtle (2 miles west) and Chignall St James (3 miles north-west). Larger places within reach include Basildon (11 miles south), Braintree (11 miles north), Harlow (15 miles west), Brentwood (10 miles south-west), Maldon (9 miles east) and Canvey Island (15 miles south).
Around Moulsham
In Moulsham, that means homes and buildings near Moulsham High School, Chelmsford College and Oaklands Park. Also close by are Our Lady Immaculate Church (less than half a mile north) and The Anchor Public House (within half a mile north-east). The closest station to Moulsham is Chelmsford station, about 0.6 miles north. Other landmarks nearby include Bond Street Chelmsford (0.6 miles north-east) and Peter Edwards Museum And Library (less than half a mile north). Not far away are Newland Grove.
The process
There isn’t much for you to do on the day. Show us the job and we will take it from there. The job generally takes anything from a few hours to a full day, depending on how many windows. For a job in Moulsham, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- 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.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about stairs, lifts or work at height
- Plan for the work area to be out of bounds to pets and children
Getting a quote
Want a quote for sand mastic? Please phone 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and send you a clear quote before any work starts.