Essex · England
Hartford End External Mastic
External mastic for Hartford End and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Joints with sealant missing in places
- Damp patches traced to an open external joint
- Panel joints letting water in
External mastic in Hartford End
Low-level joints can normally be done from the ground. For joints higher up, give us some details of the building and we will confirm what access is needed. If you are dealing with gaps where render, brick and frames meet and sealant that has lost its bond to the brick or render, we can put it right, whatever the surface.
Older homes in small places like Hartford End may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
All our work is covered by our one-year guarantee.
- Where
- Hartford End (CM3)
- Region
- Essex
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
External mastic in Hartford End: local notes
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Ford End Church of England Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
Hartford End is about 6 miles south-west of Braintree, in Essex. Homes, rented property, offices and hotels in Hartford End can book us for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Our Essex coverage runs to 644 places, and Hartford End is one of them. For nearby work, see our Chelmsford page.
Postcode districts we cover here for external mastic: CM3. Neighbouring places we cover for external mastic include Ford End (1 mile south-west), Causeway End (1 mile north), North End (2 miles north-west), Howe Street (2 miles south) and Felsted (2 miles north). Within a short drive, we also cover Chelmsford (7 miles south), Braintree (6 miles north-east), Harlow (15 miles west), Brentwood (15 miles south-west), Maldon (12 miles south-east) and Billericay (14 miles south).
Around Hartford End
A little further out are Broomfield Hospital (3.9 miles south). The countryside around Hartford End includes Phyllis Currie Nature Reserve.
Towns and villages near Hartford End
More services for Hartford End
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Why it’s worth doing now in Hartford End
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. Older cottages and farmhouses around Hartford End can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why book with us
- Colour picked to suit the job
- Every job guaranteed for a year
- We agree the colour with you first
- Anti-fungal sanitary silicone in wet areas
How the job changes by surface
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. Where one has been mortared, we cut it out and reseal it with sealant if the joint can be cleared.
Common problems we fix in Hartford End
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Any of these means the joints need attention:
- Cracked joints where brick meets render or frames
- Joints where the bead has come unstuck
- Joints with sealant missing in places
- Rain getting behind render or cladding at a joint
If you live in an older home near Church of St John the Evangelist, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Before booking anyone
- How long to leave it before use
- Which sealant they’ll use, and why
- Are they insured?
- What the quote includes, VAT included or not
What sealant work can’t fix
To be straight with you, there are a few things sealant will not fix:
- Render that is blown, hollow or coming away
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracking across the wall rather than at a joint
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before booking.
Joints and surfaces we work on
- Copings & trims
- Brickwork movement joints
- Façade panels
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
What affects the cost of external mastic
Every job gets its own quote. These are the things that affect it:
- How easy the joints are to reach
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
- The number and length of the joints
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we will go through it with you.
What to tell us for a quote
To make quoting easier, let us know:
- The rough size of the job
- Where the property is
- What’s wrong with the joints now
- Any access issues, like height or stairs
There’s no standard price list. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or email us.
The process
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours to a few days, depending on the length of joint and the access, and the area is left clean. In a small place like Hartford End, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Keep children and pets away from the work area
- Move anything stored near the joints
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you’re ready, phone 0345 464 0079 or send us an email.
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Questions from Hartford End
Do you cover smaller places like Hartford End?
Yes. Hartford End is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is there a guarantee on external mastic in Hartford End?
All our work, in Hartford End and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Do you work for letting agents?
Yes, often. We can quote for several properties at once.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Are you fully insured?
Yes, we are fully insured.
How long does the job take?
It depends on the size of the job, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We’ll give you a better idea when we quote.
Where is Mr Mastic based?
We work from Crawley. We cover Hartford End and the rest of Essex.
What do you put in the joint?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.