Essex · England
Chatham Green External Mastic
External mastic for Chatham Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Plants rooting in failed movement joints
- Gaps where render, brick and frames meet
- Joints where the bead has come unstuck
Chatham Green questions
Can you help a landlord with a rental near Beaulieu Park station?
Yes. We work for landlords and letting agents as well as homeowners. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Will you come out to Chatham Green?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Why is there a gap in my brick wall?
Brickwork, render and cladding all move a little, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
Can you reach joints on upper floors?
It depends on the height and the site. Ground-floor joints are simple; for higher work, tell us about the building and we’ll confirm what’s needed.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used before we leave.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
About our external mastic in Chatham Green
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant. We work on joints between brick and frames, concrete & block and façade panels, and people most often call us about joints where the bead has come unstuck and water getting into walls through failed joints.
Somewhere as small as Chatham Green, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Chatham Green (CM3)
- Region
- Essex
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Towns and villages near Chatham Green
Other services in Chatham Green
How the job changes by surface
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap so the sealant isn’t too deep.
Render joints
Water behind render can lead to blown patches. Resealing the joints early keeps water out and helps it last.
What affects the cost of external mastic
Jobs vary more than people expect. What affects the quote:
- The number of rooms or windows
- The amount of work
- Working hours on commercial sites
- How easy the joints are to reach
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Ask us for a quote and we will go through it with you.
What we need to know
When you call or email, it’s useful to know:
- Photos by email, if that’s easy
- Whether it’s a home or a business
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. Whenever you’re ready, call 0345 464 0079 or send us an email.
When it isn’t the sealant
New sealant can’t fix everything, and we’d rather say so up front. Sealant won’t put right:
- Rising or penetrating damp from elsewhere in the wall
- Adding movement joints to masonry that has none
- Render that is blown, hollow or coming away
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Façade panels
- Joints between brick and frames
- Copings & trims
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
Work for landlords, hotels and businesses
For anyone letting property in or around Chatham Green, several properties can go on one quote. Send us the addresses and the work at each, and photos by email help.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Aftercare tips
No joint lasts for ever, but care makes a real difference. Our tips:
- Clear growth from the base of walls and joints
- Keep water from gutters off the wall
- Get split or bare joints resealed while the damage is small
- Check external joints each spring
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.
Outside joints around Chatham Green
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.
If you live in an older home near Church of St John the Evangelist, an extension built onto an older house moves differently, and the joint between them takes the strain. Letting a property close to Beaulieu Park station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Chatham Green is about 5 miles north of Chelmsford, in Essex. Anywhere in CM3, we can carry out external mastic at your property. Across Essex, we cover 644 places, Chatham Green among them.
Every address in CM3 is covered for external mastic, from the main roads to the quietest streets. We also cover Little Leighs (1 mile north-east), Howe Street (1 mile south-west), Hartford End (2 miles north-west), Willows Green (2 miles north) and Ford End (3 miles west). Larger places within reach include Chelmsford (5 miles south), Braintree (6 miles north-east), Brentwood (15 miles south-west), Maldon (10 miles south-east), Billericay (13 miles south) and Witham (6 miles east).
What’s near Chatham Green
The closest station to Chatham Green is Beaulieu Park station, about 4.1 miles south of the centre. Nearby you’ll also find Broomfield Hospital (2.9 miles south). For a walk, there’s Sandylay and Moat Woods.
Why act early in Chatham Green
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render around the joint, so the problem grows beyond the joint itself. In a small place like Chatham Green, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first.
Why Chatham Green customers choose us
- An ARBOMaster approved applicator
- Anti-fungal silicone where joints get wet
- Full insurance on every job
- You choose the colour before work begins
See what affects the cost and customer reviews.
The process
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a handful of joints, longer for a whole elevation. Somewhere as small as Chatham Green, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- On commercial sites, let us know about site rules
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
Get a quote
For external mastic in Chatham Green, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.