Essex · England
External Mastic in Writtle
We cover Writtle for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Joints where the bead has come unstuck
- Movement joints filled with mortar instead of sealant
- Failed sealant between panels on a façade
External mastic in Writtle, done properly
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we will confirm what access is needed. If you are dealing with sealant pulling away from one side of the joint and failed seals between different materials, we can put it right, whatever the surface.
Around Writtle, garages, outbuildings and extensions all add to the joints on the outside of a home. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
You get a one-year guarantee, the same in Writtle as everywhere else we work.
- Where
- Writtle (CM1)
- Wider area
- Essex
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
What we cannot put right
It helps to know what we cannot do:
- Damp that is not coming from the joint
- Cracked brickwork or render that needs a builder or plasterer
- Walls that need new movement joints cut into them
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
Where we work in Writtle
- Render & cladding joints
- Copings & trims
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
Also near Writtle
What else we do in Writtle
The process
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The work itself takes a few hours to a few days, depending on the length of joint and the access from start to finish. A visit to Writtle is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
- Keep children and pets away from the work area
Getting a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or drop us an email.
Read more
How we quote for external mastic
You’ll get a clear quote before any work starts. It takes into account:
- The product the joint needs
- Access and height
- The old material and how stubborn it is
- Any working-time requirements on site
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Asking for a quote
What to tell us when you ask for a quote:
- Where the property is
- How many joints, rooms or windows are involved
- What’s wrong with the joints now
- Any access issues, like height or stairs
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Act on the first splits you see
- Keep movement joints as flexible joints, not mortar
- Fix overflowing gutters above sealed joints
- Keep high-pressure jets off the joints
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
Common problems we fix in Writtle
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.
These are the problems we are asked about most:
- Joints with sealant missing in places
- Water getting into walls through failed joints
- Old sealant gone brittle and cracked
- Gaps where render, brick and frames meet
If you let a flat or house near Chelmsford station, split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- Which sealant they’ll use, and why
- How hidden problems are handled
- Are they insured?
- How the joint is cleaned and prepared
Common questions in Writtle
I let a flat near Chelmsford station. Can you help?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Can you do external mastic in Writtle?
Yes. Our work covers London and the South East, and Writtle is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear quote.
Can you do several jobs on one visit?
Yes. More than one area can go on one quote.
When will the joints need doing again?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges.
Is it OK to fill a movement joint with cement?
No, not where the gap is a movement joint. Pointing it stops it working and can lead to cracking. A flexible sealant is the right fill.
Is the work guaranteed?
Yes. Every job comes with a 12-month guarantee.
What should I tell you?
A short description and the location, plus pictures if you have them. We’ll ask anything else we need to know.
Are you ARBOMaster approved?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
What external mastic looks like in Writtle
Historic houses like Hylands (about 1.4 miles south-east) are a reminder that the area around Writtle has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. London and the South East are among the drier parts 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 All Saints, the joints between older walls, newer extensions and the roofline need a sealant that can move. Schools such as Writtle Infant School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Writtle is about 3 miles west of Chelmsford, in Essex. Whether you’re in the middle of Writtle or further out, we cover external mastic for every kind of property. Our Essex coverage runs to 644 places, Writtle among them.
Here we cover the CM1 postcode area for external mastic. That includes homes and businesses on Millfields, Well Field and Little Meadow and the roads around them. We also cover the places around Writtle: Widford (2 miles south-east), Moulsham (2 miles east), Chignall St James (2 miles north), Patching (2 miles north-east) and Chelmsford (3 miles east). Larger places within reach include Basildon (11 miles south), Braintree (12 miles north-east), Harlow (13 miles west), Brentwood (9 miles south-west), Maldon (11 miles east) and Billericay (7 miles south).
Near you in Writtle
Typical jobs here are in homes near Rose And Crown Public House, Hylands School and Central Park, among other places. For rail, the closest station is Chelmsford station, roughly 2.1 miles east of the centre. Well-known places in the area include Peter Edwards Museum And Library (2 miles east) and Bond Street Chelmsford (2.4 miles east). The countryside around Writtle includes Newland Grove.
Why act early in Writtle
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render near the open joint, so the damage spreads beyond the joint. Around Writtle, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or send us an email and we’ll talk you through it.
Why us?
- You choose the colour before work begins
- Every job guaranteed for a year
- More than 20 years in sealant work
- Sanitary silicone with an anti-fungal additive in wet areas
Read what affects the cost and our reviews.