Essex · England
Great Yeldham External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Great Yeldham, backed by a one-year guarantee. Ask us for a quote.
- Rain getting behind render or cladding at a joint
- Joints pointed up with cement by mistake
- Joints where the bead has come unstuck
Aftercare tips
Looking after new joints is easy:
- Look over the joints every year, ideally after winter
- Leave the joints unpainted unless we’ve said otherwise
- Never let anyone fill a movement joint with mortar
- Do not let climbing plants root in the sealant
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead and let water in behind.
Small splits are the time to act. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
External mastic in Great Yeldham, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it. We are often asked to deal with movement joints with cracked, split or missing sealant and cracked joints where brick meets render or frames, on façade panels, render & cladding joints and concrete & block.
Somewhere as small as Great Yeldham, homes and farm buildings often face open ground, 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.
Big or small, it’s backed by our one-year guarantee.
- Where
- Great Yeldham (CO9)
- Region
- Essex
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Also near Great Yeldham
Also in Great Yeldham
Different surfaces, different methods
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so its sealant has to stay flexible.
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. We prime where the product needs it.
What sealant work can’t fix
We’d rather tell you now than do work that will not last, so these are the limits:
- Structural movement, which needs a surveyor or engineer
- Loose or hollow render, which needs re-rendering
- Cracks in the bricks or render themselves, away from the joints
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Surfaces we seal
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Joints between brick and frames
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
For anyone letting property in or around Great Yeldham, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
The process
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes a few hours for a handful of joints, longer for a whole elevation, and the area is left clean. Somewhere as small as Great Yeldham, access is often the only tricky part. 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any previous sealing or DIY attempts
Ask for a quote
Asking for a quote is easy: let us know the job and the location and its rough size. A few photos by email make the job easier to understand, and we’ll take it from there.
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Great Yeldham: your questions answered
Can you do external mastic in Great Yeldham?
Yes. Our work covers London and the South East, and Great Yeldham is part of that. You can call 0345 464 0079 or email us and tell us what needs doing, and we will give you a clear price.
Is Great Yeldham within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you quote for more than one area?
Yes. Just list everything you need and we’ll quote it together.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Can tenants book the work?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
How do I get a quote for external mastic in Great Yeldham?
It depends on the job, so we quote each one individually. To get one, phone 0345 464 0079 or drop us an email and let us know what needs doing and where.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply call 0345 464 0079 or email us.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
Can I do it myself?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Leave it or put it right?
Running new sealant over the old bead rarely lasts. The new layer can’t bond properly to old, weathered material, so the old joint is cut out fully first. Where a wall is exposed, as many are in small places like Great Yeldham, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
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 Great Yeldham customers choose us
- A choice of colours where the product allows
- We never seal over old sealant
- We’re fully insured
- An ARBOMaster approved applicator
Take a look at what affects the cost or our reviews.
Great Yeldham buildings and the weather
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Hedingham Castle (about 2.3 miles south-east) are a reminder that the area around Great Yeldham has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Schools such as St Andrew's Church of England Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. In the older streets around Parish Church of St Andrew, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Great Yeldham is about 6 miles north-west of Halstead, in Essex. For external mastic in and around Great Yeldham, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We’re based in Crawley and cover Essex. 644 places in Essex are on our list. For nearby work, see our Chelmsford page, about 20 miles away.
Every address in CO9 is covered for external mastic, from the main roads to the quietest streets. If you need external mastic at a property on Church Road, Market Grove and High Street or a nearby road, our applicators can take on the job. We also cover the places around Great Yeldham: Oaker Hill (1 mile north-west), Tilbury Juxta Clare (1 mile north), Little Yeldham (1 mile north-east), Toppesfield (2 miles south-west) and Ridgewell (2 miles north-west). We also work in nearby towns such as Braintree (9 miles south), Witham (15 miles south), Saffron Walden (14 miles west), Halstead (6 miles south-east), Great Dunmow (13 miles south-west) and Great Notley (11 miles south).
Local landmarks in Great Yeldham
Around Great Yeldham, our work takes us to homes and buildings near The Three Bottles Public House and Hedingham School and Sixth Form, among other places. A little further out are Halstead Hospital (5.7 miles south-east) and Hedingham Castle (2.3 miles south-east).