Essex · England
Sand mastic for sash & case windows in Great Horkesley, Essex
Our applicators work in Great Horkesley on 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 every job guaranteed for a year.
- A silicone bead on a sash window that spoils the look
- Draughts and rain around sash boxes
- Failed mastic on an exposed elevation
What happens if it’s left?
New mastic over crumbling mastic will not hold. Raking out and preparing the joint gives it a sound base so the new work lasts. Homes in smaller places like Great Horkesley can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Combining jobs into one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why book with us
- A 12-month guarantee on all work
- More than 20 years in sealant work
- Old sealant always removed completely
- Neat joints and a tidy finish
Take a look at our cost guide and customer reviews.
Sand mastic in Great Horkesley, done properly
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s made from sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. We work on tenement windows, sash and case windows and timber door frames, and the jobs we see most are draughty sash windows at the surround and gaps between timber frames and stone or brick.
Around Great Horkesley, conservatories, garden rooms and patio doors are often part of the house. Their glazing joints and frame seals are as much a part of the job as the windows, and any older timber or sash windows need a sealant that suits them.
Our work is backed for twelve months, in Great Horkesley and everywhere else we cover.
- Place
- Great Horkesley (CO6)
- Wider area
- Essex
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Places near Great Horkesley
Other services in Great Horkesley
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to a full day, depending on how many windows and we leave things clean and tidy. Parking around Great Horkesley is generally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
- Keep pets and children clear of the area while we work
Get a quote
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Advice
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Different surfaces, different methods
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Tenement and terrace windows
Upper-floor windows need access planning. Let us know the floor and we’ll confirm access.
Windows and doors in Great Horkesley
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Colchester station change hands often, and any sash windows need sound mastic to keep draughts and rain out. In the older streets around Church of St John, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Great Horkesley is about 3 miles north of Colchester, in Essex. For sand mastic in and around Great Horkesley, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We’re based in Crawley and cover Essex. Across Essex, we cover 644 places, and Great Horkesley is one of them. Our Chelmsford page covers work nearby.
All of CO6 is within our area for sand mastic, from the main roads to the quietest streets. Whether your property is on Exeter Close, Malvern Way and Keelers Way or a nearby road, we can help. Nearby, we also carry out sand mastic in Mile End (1 mile south-east), West Bergholt (1 mile south-west), Little Horkesley (2 miles north-west), Wissington (3 miles north-west) and Fordham Heath (3 miles south-west). We also work in nearby towns such as Colchester (3 miles south), Braintree (14 miles west), Clacton-on-Sea (15 miles south-east), Witham (13 miles south-west), Camulodunum (3 miles south) and Halstead (10 miles west).
Local landmarks in Great Horkesley
Around Great Horkesley, our work takes us to homes and buildings near The Half Butt Inn and Gilberd School. For rail, the closest station is Colchester station, about 1.9 miles south of the centre. Nearby you will also find Lion Walk (2.8 miles south) and Colchester Castle (2.8 miles south-east). Green spaces nearby include Westhouse Wood.
What sealant work cannot fix
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Sash cords, weights and draught-proofing of the sashes
- Decisions on consent for listed homes
- Broken panes
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
Surfaces we seal
- Timber door frames
- Brick reveals
- Stone surrounds
- Sash and case windows
- Tenement windows
- Period & listed homes
Signs you need sand mastic in Great Horkesley
Over the years, sand mastic weathers. It hardens, cracks and starts to come away on the stone or timber.
It’s worth asking for a quote if you see:
- Weathered mastic on the most exposed windows
- Draughts and rain around sash boxes
- Window mastic to renew ahead of painting
- Cracked mastic round a front door frame
Managing a site like The Bishop William Ward Church of England Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- How long the guarantee is
- How the surfaces are prepared before sealing
- How long to leave it before use
- Whether they seal over old material or remove it
Great Horkesley questions
Is Great Horkesley in your area for sand mastic?
Yes. Our work covers London and the South East, and Great Horkesley is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Is Great Horkesley within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you have insurance?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
Will the old sealant be removed?
Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
What does sand mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before any work starts.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little.
What guarantee comes with the work?
Every job comes with our one-year guarantee.
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.