Essex · England
External & façade joints in Great Waltham, Essex
Problem with your movement joints in Great Waltham? We remove the old material, prepare the joints and seal them properly.
- Hard, crazed mastic that has stopped moving
- Damp patches traced to an open external joint
- Joints where the bead has come unstuck
What external mastic looks like in Great Waltham
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.
In the older streets around Church of SS Mary and Laurence, an extension built onto an older house moves differently, and the joint between them takes the strain. Schools such as Chelmer Valley High School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Great Waltham is about 4 miles north of Chelmsford, in Essex. Great Waltham gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. We cover 644 towns and villages across Essex, from the larger towns to small villages.
All of CM3 is within our area for external mastic. External mastic is available to properties on Brook Mead, Cherry Garden Road and Chelmsford Road and the roads around them. Close by, we work in Breeds (1 mile south-west), Minnow End (1 mile south-east), Little Waltham (1 mile south-east), Broomfield (2 miles south-east) and Chignall Smealy (2 miles south-west). We also work in nearby towns such as Chelmsford (4 miles south), Basildon (15 miles south), Braintree (8 miles north-east), Harlow (15 miles west), Brentwood (13 miles south-west) and Maldon (11 miles south-east).
What’s near Great Waltham
Around Great Waltham, our work takes us to homes and buildings near The Beehive pub and the streets around them. Great Waltham’s nearest station is Beaulieu Park station, roughly 3.7 miles south-east. A little further out are Broomfield Hospital (1.4 miles south). Open spaces near Great Waltham include Little Waltham Meadows.
About our external mastic in Great Waltham
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render. We are often asked to deal with water getting into walls through failed joints and sealant that has lost its bond to the brick or render, across brickwork movement joints, joints between brick and frames and concrete & block.
Outside joints can only be sealed when they’re dry, so work in Great Waltham is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Place
- Great Waltham (CM3)
- Region
- Essex
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Why act early in Great Waltham
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost near the open joint, so the problem grows beyond the joint itself. In a small place like Great Waltham, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and give you a clear price before any work starts.
Why us?
- White, clear, grey or another colour, product permitting
- 4.9 on Google from 180+ five-star reviews
- ARBOMaster approved applicator
- Neat joints and a tidy finish
See our cost guide and what customers say.
Surface by surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant so the movement is taken up.
Copings and trims
A failed coping joint lets water into the top of the wall. Sealing them early saves the wall below.
What we cannot put right
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Cracks in the bricks or render themselves, away from the joints
- Render that is blown, hollow or coming away
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Façade panels
- Copings & trims
- Joints between brick and frames
When to call us in Great Waltham
Sometimes a movement joint was filled with mortar or a rigid filler. The joint cannot move, so the wall cracks somewhere else instead.
These are the problems we’re asked about most:
- Panel joints letting water in
- Rain getting behind render or cladding at a joint
- Old sealant gone brittle and cracked
- Sealant that has lost its bond to the brick or render
If you let a flat or house near Beaulieu Park station, split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- How the joint is cleaned and prepared
- What insurance they hold
- The length of the guarantee
- Whether the sealant suits the joint
Towns and villages near Great Waltham
More services for Great Waltham
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- How much there is to do
- Working hours on commercial sites
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or drop us an email and we will talk you through it.
What we need to know
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
- The address or postcode of the job
- Whether it has been sealed before
We quote each job on its own, so start by telling us what you need. Just phone 0345 464 0079 or drop us an email with the details and send photos if you have them.
Your questions about external mastic in Great Waltham
Will you come out to Great Waltham?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is Great Waltham in your area for external mastic?
Yes. Our work covers London and the South East, and Great Waltham is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
Do you work at height?
Each building is different. Send us photos and a rough idea of the height, and we will confirm what access is needed.
Is the work guaranteed?
Yes. All our work carries our one-year guarantee.
How long should I leave it?
That depends on the sealant used, so follow the cure time we give you when we finish.
Do you take out the old sealant first?
Yes, every time. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we are using and why.
Can you seal over the old sealant?
No, because it fails. We remove every bit of old sealant first.
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours to a few days, depending on the length of joint and the access and we leave things clean and tidy. In a small place like Great Waltham, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Let us know about parking restrictions
- For indoor joints, keep the area dry beforehand if you can
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved and give you a clear quote.
Read more
How to look after the new joints
To keep the joints looking good and working properly:
- Keep movement joints as flexible joints, not mortar
- Show decorators and builders where the movement joints are
- Walk round the building once a year and look at the joints
- Keep high-pressure jets off the joints
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.