Medway · England
External Mastic in Allhallows
External mastic for Allhallows and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
- Hard, crazed mastic that has stopped moving
External mastic for homes and businesses in Allhallows
A movement joint is a deliberate break that lets a wall expand and contract. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. Typical jobs include weathered mastic that no longer stretches and movement joints filled with mortar instead of sealant, across concrete & block, façade panels and joints between brick and frames.
Outside joints can only be sealed when they’re dry, so work in Allhallows is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
Big or small, you get the same 12-month guarantee.
- Location
- Allhallows (ME3)
- Region
- Medway
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Honest limits
In fairness, there are a few things sealant will not fix:
- Render that’s blown, hollow or coming away
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Structural movement, which needs a surveyor or engineer
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
Also near Allhallows
What else we do in Allhallows
Outside joints around Allhallows
Allhallows is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on movement joints and outside wall joints, especially on the side facing the sea. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Chalkwell station, outside joints that have cracked can let damp into a rental, so check them between lets. Managing a site like Allhallows Primary Academy? Then its movement joints, gutters and trims need looking after like any other building’s. If you live in an older home near Church of All Saints, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Allhallows is about 5 miles south-east of Canvey Island, in Medway. Anywhere in ME3, we cover external mastic for homes and businesses. We cover 68 towns and villages across Medway, large and small. We also work in Chelmsford, around 20 miles away.
All of ME3 is within our area for external mastic. Whether your property is on St Andrew's Walk, Avery Way and St Matthew's Way or anywhere close by, our applicators can take on the job. Neighbouring places we cover for external mastic include Allhallows-on-Sea (1 mile north-east), Lower Stoke (1 mile south), Middle Stoke (1 mile south), Stoke (2 miles south-west) and St Mary Hoo (2 miles west). Within a short drive, we also cover Gillingham (7 miles south-west), Chatham (9 miles south-west), Rochester (8 miles south-west), Rainham (8 miles south), Strood (9 miles south-west) and Luton (8 miles south-west).
Local landmarks in Allhallows
Around Allhallows, our work takes us to homes and buildings near Rose And Crown Public House, among other places. The closest station to Allhallows is Chalkwell station, roughly 5 miles north of the centre. Other landmarks nearby include Chartwell Private Hospital (5.5 miles north) and Bay Museum (3.9 miles north-west). For a walk, there’s Bishop Saltings.
Aftercare tips
So the new joints stay in good condition:
- Act on the first splits you see
- Walk round the building once a year and look at the joints
- Leave the joints unpainted unless we have said otherwise
- Avoid pressure-washing directly into sealant joints
Only paint over the joint if we have confirmed the sealant can take paint. Paint can crack on a flexible joint and spoil the finish.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.
Allhallows: your questions answered
Do you work for landlords with property near Chalkwell station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Is external mastic in a coastal place like Allhallows any different?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
How long will you be here?
That depends on the amount of work, but most jobs take anything from a few hours to several days, depending on the building. We’ll give you a better idea when we quote.
When will the joints need doing again?
That varies with the weather the wall faces, how much it moves and the sealant used. Sealant is a maintenance item, so check the joints once a year and reseal when it splits.
Do I need to be at home?
It depends on the job. Inside work needs someone to give us access.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
What’s an expansion joint in brickwork?
Walls move with heat, cold and moisture, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
Landlords, agents and businesses in Allhallows
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Can I do it myself?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Different surfaces, different methods
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. We choose the product to suit.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so the movement is taken up.
Why deal with it now?
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. Older cottages and farmhouses around Allhallows can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or drop us an email.
Why Allhallows customers choose us
- Tidy, careful work
- 4.9 on Google from 180+ five-star reviews
- 20+ years of sealant experience
- We never seal over old sealant
Read what affects the cost and customer reviews.
How it works
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and clear up. It normally takes anything from a few hours to several days, depending on the building. Somewhere like Allhallows needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by walking round the building and agreeing the joints and the access.
- 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.
- 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
- Clear the area around the work
- Keep children and pets away from the work area
- Mention if the joints have been sealed before
Ask for a quote
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before work begins.