Essex · England
External Mastic in High Garrett
We cover High Garrett for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
- Joints pointed up with cement by mistake
External mastic in High Garrett, done properly
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a matching colour. Typical jobs include failed seals between different materials and joints pointed up with cement by mistake, across concrete & block, façade panels and render & cladding joints.
In a village or hamlet like High Garrett, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- High Garrett (CM7)
- Wider area
- Essex
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Common problems we fix in High Garrett
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
The most common problems we see are:
- Moss and dirt in joints with no sealant left
- Joints where the bead has come unstuck
- Panel joints letting water in
- Joints pointed up with cement by mistake
Rented homes near Braintree station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What to look for in a quote
- What insurance they hold
- How the colour is chosen
- Is VAT in the price?
- When the joint can take water or movement
Places near High Garrett
More services for High Garrett
Can I do it myself?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
When it isn’t the sealant
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Damp that is not coming from the joint
- Loose or hollow render, which needs re-rendering
- Adding movement joints to masonry that has none
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
Joints and surfaces we work on
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Façade panels
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Make sure movement joints aren’t pointed over
- Keep high-pressure jets off the joints
- Leave the joints unpainted unless we’ve said otherwise
- Walk round the building once a year and look at the joints
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges and let water in behind.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years.
How the visit works
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and tidy away. It normally takes anything from a few hours to several days, depending on the building. In a small place like High Garrett, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Before we arrive
- Keep children and pets away from the work area
- Tell us about any previous sealing or DIY attempts
- Mention any leaks or damp you’ve noticed
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will explain what’s involved.
Advice
For landlords and businesses
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Why act early in High Garrett
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way, and access only has to be arranged once. Where a wall is exposed, as many are in small places like High Garrett, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Doing several joints on one visit normally makes better use of the time than several visits. We’ll send you a clear quote for the lot.
What you get with us
- Rated 4.9 stars on Google
- Colour picked to suit the job
- An ARBOMaster approved applicator
- Domestic, commercial and hotel work
Read what affects the cost and our reviews.
What external mastic looks like in High Garrett
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Bocking Church Street Primary School, larger buildings have long runs of movement joint that eventually need resealing.
High Garrett is about 2 miles north of Braintree, in Essex. We provide external mastic to householders, landlords and businesses in High Garrett and nearby, as part of our work across Essex. High Garrett is one of 644 places in Essex where we work. We also work in Chelmsford, around 13 miles away.
Postcode districts we cover here for external mastic: CM7. If you need external mastic at a property on High Garrett, Grove Field and Sunnyfields Road or anywhere close by, our applicators can take on the job. If you’re 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).
Around High Garrett
Typical jobs here are in homes near Tabor Academy and Bocking Blackwater. For rail, the closest station is Braintree station, about 2.6 miles south. Well-known places in the area 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.
FAQs for High Garrett
Can you help a landlord with a rental near Braintree station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Will you come out to High Garrett?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you seal joints between two different materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. The sealant is matched to both sides.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
Do I need to be at home?
If the work is inside, we need someone to let us in. Once we’ve agreed the job, you do not need to watch us work.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
Can you reach joints on upper floors?
It depends on the height and the site. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.