Essex · England
Great Horkesley Window Mastic
Window mastic in Great Horkesley from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cold air getting in at the frame edge
- Leaking joints at the ends of sills
- Sealant in the wrong colour for the frame
Window mastic in Great Horkesley
Every window and door frame has a gap around it, and mastic is what closes it. Once that seal fails, wind and rain find the gap. Our applicators cut it out and replace it with a flexible, weatherproof sealant. If you have mastic that has split away from the wall and rain getting in at the frame or under the sill, we can help.
Many houses in smaller places like Great Horkesley have conservatories, garden rooms or patio doors. 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.
We stand behind the work with a 12-month guarantee.
- Where
- Great Horkesley (CO6)
- Region
- Essex
- Cover
- One year on every job
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What affects the cost of window mastic
The quote reflects the job in front of us. We look at:
- Access and height
- How many areas need sealing
- Any mould that needs treating
- When we can work, for business premises
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, ring 0345 464 0079 or email us for an honest opinion and a quote.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Pictures of the joints, sent by email
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
- If someone has resealed it before
Every job is quoted individually, so the first step is telling us about yours. Simply phone 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
Surface by surface
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. We cut it out, back any deep gaps and reseal properly.
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. We will point out any rot we find, as that is a job for a joiner.
Great Horkesley homes and the weather
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Colchester station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Managing a site like The Bishop William Ward Church of England Primary School? Then 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, 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. We provide window mastic to homeowners, landlords and businesses in Great Horkesley. Great Horkesley is one of 644 towns and villages in Essex where we work for window mastic. For nearby work, see our Chelmsford page, about 21 miles away.
We cover every part of CO6 for window mastic and the streets around it. We cover properties on Exeter Close, Malvern Way and Keelers Way and the roads around them. Close by, we work 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). Larger places within reach include 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).
Around Great Horkesley
Around Great Horkesley, our work takes us to homes and buildings near The Half Butt Inn and Gilberd School. The closest station to Great Horkesley is Colchester station, roughly 1.9 miles south. Other landmarks nearby include Lion Walk (2.8 miles south) and Colchester Castle (2.8 miles south-east). Green spaces nearby include Westhouse Wood.
Landlord and commercial work in Great Horkesley
For anyone letting property in or around Great Horkesley, several properties can go on one quote. Send us the addresses and the work at each.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Nearby places to Great Horkesley
What else we do in Great Horkesley
Why deal with it now?
If you’re painting or rendering, reseal at the same time. A clean new bead makes new paint or render look finished, and it’s easier while the walls are being worked on anyway. In a smaller place like Great Horkesley, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Doing several joints on one visit is generally more efficient than separate visits. We’ll give you a clear price for the lot.
What you get with us
- ARBOMaster approved applicator
- Full insurance on every job
- Domestic, commercial and hotel work
- You choose the colour before work begins
Read our cost guide and customer reviews.
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Keep solvents and bleach off the sealant
- Do not paint over the silicone
- Repaint timber before it’s bare
- Avoid blasting the frames with a pressure washer
Have a look at the joints once a year, ideally after winter. Cracks and lifting edges are easy to spot early, and if anything looks wrong, just phone 0345 464 0079 or drop us an email.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
Questions from Great Horkesley
Do you work for landlords with property near Colchester station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Is Great Horkesley within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How do I get a quote for window mastic in Great Horkesley?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Can new sealant go over the old?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Is the new sealant paintable?
Most silicone can’t be painted. Let us know beforehand, and we’ll use a paintable product where it suits.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can you seal the gap between the frame and the plaster indoors?
Yes. Plenty of draughts come through the inside joint as well as the outside, so sealing both is often worthwhile.
What happens on the day
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes anything from an hour or two to a full day, depending on how many frames there are, including the tidy-up. A visit to Great Horkesley is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Mention any leaks or damp you’ve noticed
- Mention if the joints have been sealed before
How to get a quote
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. Whenever you are ready, call 0345 464 0079 or email us.
Advice
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. Everything old must be removed first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.