Essex · England
Sand mastic for sash & case windows in Colchester, Essex
Our applicators work in Colchester on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Failed mastic on an exposed elevation
- Draughty sash windows at the surround
- Gaps where the frame meets the masonry
Windows and doors in Colchester
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Church of St Peter, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Rented homes near Colchester Town station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Colchester is in Essex. For sand mastic in and around Colchester, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Essex from our Crawley base, Colchester included. Colchester is one of 644 places in Essex where we work for sand mastic. There’s also a page for Chelmsford, roughly 21 miles from Colchester.
All of CO4, CO3, CO2 and CO1 is covered for sand mastic, from the main roads to the quietest streets. You will find streets such as High Street, North Station Road and Durham Square, and we cover them all. Colchester sits on or near the A12 and A120. Close by, we work in Camulodunum (1 mile west), Braiswick (1 mile west), Abbey Field (1 mile south), Lexden (1 mile west) and Beacon End (3 miles west). Larger places within reach include Braintree (14 miles west), Clacton-on-Sea (12 miles south-east), Maldon (15 miles south-west), Witham (13 miles south-west), Halstead (12 miles west) and Heybridge (14 miles south-west). Being one of Essex’s larger places, Colchester has every kind of property, from flats to offices.
Local landmarks in Colchester
We work in homes and buildings around Bull Meadow, The Bay And Say Public House and St John's Green Primary School. Colchester has its own railway station: Colchester Town station. A little further out are Lion Walk (under half a mile south-east) and Essex County Hospital (within half a mile south-west). The countryside around Colchester includes Westhouse Wood.
Sand mastic in Colchester, done properly
Old sand mastic cracks, crumbles and falls out over time, leaving gaps round the window. Renewing it closes the gap and tidies the surround. If you have gaps round a timber door in stone or brick and draughts and rain around sash boxes, we can put it right, whatever the surface.
Town-centre flats, shops and offices in Colchester have long runs of frames and glazing, often on upper floors. Failed joints up there let in water that can go unnoticed for a while.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
What happens if it’s left?
Filling over old, loose mastic does not last. Raking out and preparing the joint gives it a sound base so the new mastic stays put. In a large rental market like Colchester, tired sealant leads to tenant complaints about mould, damp and leaks. It’s simpler to sort between tenants than in the middle of a let.
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or drop us an email and we will talk you through it.
Why book with us
- Anti-fungal silicone where joints get wet
- Any old sealant cut out fully, not covered over
- Arbo and Everbuild products
- We leave the area clean and tidy
Read our cost guide or customer reviews.
Your questions about sand mastic in Colchester
Is sand mastic in Colchester guaranteed?
All our work, in Colchester and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Do you work for landlords with property near Colchester Town station?
Yes. We work for landlords and agents as well as householders. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
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 finished to sit neatly against the masonry.
Are you fully insured?
Yes. We are fully insured, and we’ve been doing sealant work for more than 20 years.
Do the sealants smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Can old silicone round a sash window be swapped for sand mastic?
In most cases. The silicone is cut out and the joint cleaned before the sand mastic goes in.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Do you cover Colchester?
Yes. We cover Colchester, as part of our work across South East England, London and Scotland. To book, phone 0345 464 0079 or email us.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
What happens on the day
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours per window, depending on the condition of the joints. For homes and businesses in busier parts of Colchester, parking needs a little planning. Let us know about stairs, lifts or shared entrances too.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Plan for the work area to be out of bounds to pets and children
- Let us know about earlier repairs to the joints
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Advice
When something else is needed
It helps to know what we can’t do too:
- Crumbling stone or brickwork round the window
- Broken panes
- Rotten sashes, sills or window boxes (a joiner’s job)
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
What we seal
- Stone surrounds
- Timber door frames
- Period & listed homes
- Brick reveals
- Sash and case windows
- Tenement windows
What affects the quote in Colchester
For a quick quote, just ask. The main things that affect it are:
- The type of sealant required
- Whether the work is at height
- How much there is to do
- The number of rooms or windows
The cost depends on the amount of work, how much old material has to come out and access to the work. We give a clear quote before any work starts, so you know where you stand.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
- The type of property
- Where the property is
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
Do you need sand mastic in Colchester?
Shallow joints are a common cause. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
These are the problems we are asked about most:
- Window mastic to renew ahead of painting
- Failed mastic on an exposed elevation
- Draughty sash windows at the surround
- Silicone on a period window that looks wrong
Managing a site like Colchester Sixth Form College? Then its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- How hidden problems are handled
- How much experience the applicator has
- Whether you can choose the colour
- What guarantee comes with the work

