Greater London · England
External Mastic in Hacton
Professional external mastic in and around Hacton, with old sealant always removed completely and a 12-month guarantee.
- Joints pointed up with cement by mistake
- Old sealant gone brittle and cracked
- Leaking joints around cladding and façade panels
External mastic in Hacton
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. Typical jobs include damp patches traced to an open external joint and old sealant gone brittle and cracked, across façade panels, joints between brick and frames and render & cladding joints.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Hacton, joints up high may need ladders or other access, which is worth talking through when you book.
Each job carries a 12-month guarantee, large or small.
- Location
- Hacton (RM12, RM14, RM13)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
The process
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours to a few days, depending on the length of joint and the access. In a London area like Hacton, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Let us know about parking restrictions
- Clear items away from the joints we’re working on
- For business premises, tell us about site rules or sign-in
Getting a quote
We do not publish a price list, because every job is different. Instead, we send you a clear quote for your job. To get started, call 0345 464 0079 or send us an email.
Read more
Honest limits
A few problems are outside what sealant work can do:
- Render that’s blown, hollow or coming away
- Movement that’s more than a sealant joint can take
- Cracks in the bricks or render themselves, away from the joints
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
What we seal
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
- Concrete & block
- Façade panels
- Joints between brick and frames
Places near Hacton
Also in Hacton
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Wash walls gently around the sealant
- Act on the first splits you see
- Keep water from gutters off the wall
- Check external joints each spring
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
Surface by surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two.
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind.
What affects the cost of external mastic
Jobs vary more than people expect. What affects the quote:
- Which sealant suits the joint
- Whether there’s mould to deal with
- Any working-time requirements on site
- Whether old sealant or filler has to be cut out
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Asking for a quote
When you contact us, these details help:
- Whether it’s a home or a business
- Where the property is
- A few pictures by email, if you can
- How we’d reach the joints
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will talk you through the work.
Outside joints around Hacton
London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts. 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.
For landlords with property near Upminster station, outside joints that have cracked can let damp into a rental, so check them between lets. As a London address, Hacton can be tricky for parking: let us know about parking bays, permits or a driveway.
Hacton is about 2 miles south of Hornchurch, in Greater London. We carry out external mastic for homeowners, landlords and businesses in Hacton and the surrounding area. Hacton is one of 764 towns and villages in Greater London we cover for external mastic. You can also see our page for London, roughly 14 miles from Hacton.
Here we cover the RM12, RM14 and RM13 postcode area for external mastic. Whether your property is on Gerpins Lane and Berwick Pond Road or anywhere close by, we can help. If you are just outside Hacton, we cover Upminster Bridge (1 mile north), Hornchurch (2 miles north), Upminster (2 miles north-east), Wennington (2 miles south) and Cranham (2 miles north-east). Within a short drive, we also cover London (14 miles west), St Pancras (15 miles west), Shoreditch (13 miles west), Walthamstow (11 miles west), Hoxton (13 miles west) and Whitechapel (13 miles west).
Around Hacton
In Hacton, that means homes and buildings near Sanders Draper School, The Optimist Tavern and Hornchurch Country Park. Hacton’s nearest station is Upminster station, about 1.8 miles north-east. A little further out are The Brewery (3.3 miles north-west) and Upminster Tithe Barn Museum of Nostalgia (2.4 miles north-east). The countryside around Hacton includes Ingrebourne Valley.
Common problems we fix in Hacton
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
The problems people usually mention when they call include:
- Brick movement joints where the sealant has split
- Plants rooting in failed movement joints
- Joints pointed up with cement by mistake
- Hard, crazed mastic that has stopped moving
If you look after a building such as Scotts Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Questions to ask before you book
- Is VAT in the price?
- Who does the work, and how experienced they are
- What happens if the job turns out different
- What insurance they hold
Why act early in Hacton
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler for homes in Hacton.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Why us?
- We never seal over old sealant
- White, clear, grey or another colour, product permitting
- 180+ five-star Google reviews
- Domestic, commercial and hotel work
Hacton: your questions answered
Is parking an issue for external mastic in Hacton?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Is Hacton in your area for external mastic?
Yes. Our work covers London and the South East, and Hacton is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
Do the sealants smell?
Some sealants have a smell while they cure. Ventilation helps.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Pointing it stops it working and can lead to cracking. We’ll reseal it with a flexible sealant.
Are you ARBOMaster approved?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Can landlords and businesses book you?
Yes, often. We can quote for several properties at once, and between tenancies is a good time for the work.
How long will you be here?
Most jobs take a few hours for a handful of joints, longer for a whole elevation, including the preparation. We will confirm how long when we quote.