Essex · England
High Garrett Window Mastic
Window mastic in High Garrett from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Leaking joints at the ends of sills
- Rain getting in at the frame or under the sill
- Cracked or shrunken mastic around the frame
About our window mastic in High Garrett
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty and quietens the whistle on windy days. If the draught is through the window seals instead, we’ll tell you. We are often asked to deal with a bead that doesn’t match the frame and mastic that has split away from the wall, on patio & French doors, window sills and timber windows & doors.
Outdoor sealant needs dry, clean surfaces, so work on frames around High Garrett is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
All our work is covered by our 12-month guarantee.
- Where
- High Garrett (CM7)
- Region
- Essex
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Soft or decayed wood in the frame
- Broken hinges, locks or handles
- Worn gaskets, brush seals or a door that has dropped
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- uPVC windows
- Window sills
- Patio & French doors
- Aluminium frames
- Timber windows & doors
- Composite doors
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Places near High Garrett
Other services in High Garrett
Frames and glazing around High Garrett
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you let a flat or house near Braintree station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
High Garrett is about 2 miles north of Braintree, in Essex. We provide window mastic to householders, landlords and businesses in High Garrett and nearby, as part of our work across Essex. Our area takes in 644 places across Essex, large and small. Chelmsford is on our list too, about 13 miles from High Garrett.
All of CM7 is within our area for window mastic. Streets in the area include High Garrett, Grove Field and Sunnyfields Road, and we cover them all. If you are just outside High Garrett, we cover Bocking Churchstreet (1 mile south-west), Gosfield (2 miles north), Beazley End (2 miles north-west), Church End (3 miles west) and Shalford (4 miles north-west). Larger places within reach include Colchester (14 miles east), Chelmsford (13 miles south), Maldon (13 miles south), Witham (8 miles south), Camulodunum (13 miles east) and Halstead (3 miles north-east).
What’s near High Garrett
Around High Garrett, our work takes us to homes and buildings near Tabor Academy and Bocking Blackwater and the streets around them. For rail, the closest station is Braintree station, roughly 2.6 miles south. Other landmarks nearby include Tudor House Museum (Braintree) (1.7 miles south-west) and Braintree Community Hospital (2.6 miles south-west). The countryside around High Garrett includes Belcher's and Broadfield Woods.
Signs you need window mastic in High Garrett
Water runs down the glass onto the sill, so the sill ends and the joint below the frame are common leak points. When that sealant fails, water gets into the wall or under the frame.
These are the problems we’re asked about most:
- Whistling draughts around closed windows
- Black, perished sealant on frames
- Cracked internal joints between frame and plaster
- A bead that does not match the frame
Managing a site like Bocking Church Street Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Before booking anyone
- Whether you can choose the colour
- Whether the sealant suits the joint
- What guarantee comes with the work
- What the quote includes, VAT included or not
What we do, step by step
At the end, we look at the finished work together. The visit itself normally takes a morning for a couple of windows and a door, depending on the size of the job. Somewhere as small as High Garrett, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each frame is looked over and we agree which ones need resealing.
- 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.
- We tool each bead neatly and check every joint is closed.
Getting ready for the visit
- Keep children and pets away from the work area
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Every job is quoted individually. Simply call 0345 464 0079 or drop us an email and describe the job and send photos if you have them.
Read more
Quotes for window mastic in High Garrett
We quote each job individually. These are the things that affect it:
- Working hours on commercial sites
- Any mould that needs treating
- The number of rooms or windows
- The size of the job
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Pictures of the joints, sent by email
- Any access issues, like height or stairs
- Where the job is, and your postcode
- If someone has resealed it before
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Landlords, agents and businesses in High Garrett
If you manage several properties in or around High Garrett, several properties can be quoted together. Just tell us the addresses and what each one needs.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured.
Why deal with it now?
Working on frames from a ladder with a sealant gun is not easy, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. Around High Garrett, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, call 0345 464 0079 or send us an email for an honest opinion and a quote.
Why High Garrett customers choose us
- Trusted Arbo and Everbuild sealants
- 180+ five-star Google reviews
- 20+ years of sealant experience
- Homes, businesses and hotels
Take a look at what affects the cost and our reviews.
Your questions about window mastic in High Garrett
Do you cover High Garrett for window mastic?
Yes, High Garrett is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Can you help a landlord with a rental near Braintree station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
What information do you need?
Just the basics: the address or postcode, what’s wrong and any access issues. After that, simply ring 0345 464 0079 or send us an email.
How long should I leave it?
It depends on the product and the temperature. Before we leave, we will tell you the cure time.
Can you get sealant to suit coloured frames?
Generally, yes. Tell us the frame colour when you get in touch and we will use the nearest match.
Can new window sealant be painted?
That depends on the product. Some hybrid sealants can be painted; silicone cannot. Mention any painting plans before we start.
Is there any odour?
That depends on the sealant. Some smell for a while, some hardly at all, and any smell fades as they cure.
Is it OK to seal over old sealant?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.