Essex · England
Great Sampford External Mastic
Professional external mastic in and around Great Sampford, with old sealant always removed completely and a 12-month guarantee.
- Water getting into walls through failed joints
- Failed seals between different materials
- Joints pointed up with cement by mistake
Why it’s worth doing now in Great Sampford
Sealing over the top of old mastic does not hold for long. The new layer can’t bond properly to old, weathered material, so the old joint is cut out fully first. In a small place like Great Sampford, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Why Great Sampford clients choose us
- An ARBOMaster approved applicator
- Any old sealant cut out fully, not covered over
- Quality sealants from Arbo and Everbuild
- Experience in homes, commercial sites and hotels
Take a look at our cost guide and customer reviews.
External mastic in Great Sampford, done properly
On houses, flats and commercial buildings across Great Sampford, we reseal joints in brickwork, render, cladding and façade panels. The preparation is the same whatever the wall: clean joint faces and the right depth. We work on brickwork movement joints, façade panels and copings & trims, and people most often call us about movement joints with cracked, split or missing sealant and rain getting behind render or cladding at a joint.
External sealant needs dry, clean surfaces, so work around Great Sampford is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
All our work comes with our one-year guarantee, wherever you are in Essex.
- Place
- Great Sampford (CB10)
- Region
- Essex
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
When to call us in Great Sampford
Many joints fail because they were sealed too deep or with nothing behind them. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
Any of these means the joints need attention:
- Weeds or debris growing in open joints
- Leaking joints around cladding and façade panels
- Joints with sealant missing in places
- Sealant pulling away from one side of the joint
Homes close to Church of St Michael include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
What your quote should include
- Which colour the sealant will be
- Whether they’re fully insured
- Whether all the old sealant comes out first
- What the quote includes, VAT included or not
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Check the sealant is paintable before painting near it
- Have failed joints looked at early
- Tell anyone working on the walls about the movement joints
- Keep soil, plants and ivy away from the joints
Do not let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
Questions from Great Sampford
Is Great Sampford in your area for external mastic?
Yes. Our work covers London and the South East, and Great Sampford is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Do you cover smaller places like Great Sampford?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
What colours does the sealant come in?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We choose the closest to your brick or render so it does not stand out.
What does external mastic cost?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
How often do external joints need resealing?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Our work comes with a one-year guarantee.
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.
Are you ARBOMaster approved?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do you work for landlords and businesses?
Yes, often. We can quote for several properties at once.
How it works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes anything from a few hours to several days, depending on the building, and the area is left clean. Somewhere like Great Sampford needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Try not to wet indoor joints just before the visit
- Let us know if you’ve seen damp or leaks
- Tell us if parking is tricky
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or drop us an email.
Read more
Also near Great Sampford
Also in Great Sampford
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
How the job changes by surface
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Render joints
Water behind render can lead to blown patches. Resealing the joints early keeps water out.
Landlord and commercial work in Great Sampford
We also work for property managers and facilities teams in Great Sampford and across Essex. We can quote a run of properties together, and we’re fully insured for the work.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
External mastic in Great Sampford: local notes
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.
Managing a site like Great Sampford Community Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Great Sampford is in Essex. Jobs in Great Sampford get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 644 places across Essex, large and small. Our Chelmsford page covers work nearby.
All of CB10 is covered for external mastic. If you need external mastic at a property on Sparepenny Lane South, Parsonage Farm Lane and Willetts Field or a nearby road, our applicators can take on the job. Neighbouring places we cover for external mastic include Wimbish Green (3 miles west), Bardfield End Green (3 miles south), Tye Green (3 miles west), Thaxted (3 miles south-west) and Howlett End (4 miles west). Within a short drive, we also cover Braintree (10 miles south-east), Saffron Walden (7 miles west), Halstead (11 miles east), Great Dunmow (8 miles south), Stansted Mountfitchet (11 miles south-west) and Great Notley (11 miles south-east).
Near you in Great Sampford
In Great Sampford, that means homes and buildings near Red Lion Inn and the streets around them. Well-known places in the area include Castle Camps (4.5 miles north). For a walk, there’s West Wood.