Greater London · England
External & façade joints in Rainham, Greater London
Our applicators work in Rainham on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Joints with sealant missing in places
- Gaps where render, brick and frames meet
- Weathered mastic that no longer stretches
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Deal with leaking gutters that soak the joints below
- Point out the joints to other trades
- Keep movement joints as flexible joints, not mortar
- Avoid pressure-washing directly into sealant joints
Only paint over the joint if we’ve confirmed the sealant can take paint. Many exterior sealants are not designed to be painted.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal before water has had years to get in.
External mastic for homes and businesses in Rainham
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, so it bonds to the two sides only and can stretch. We work on brickwork movement joints, render & cladding joints and façade panels, and people most often call us about weeds or debris growing in open joints and rain getting behind render or cladding at a joint.
Outside work in London starts with access: side passages, upper floors and where to park. For a home in Rainham, tell us how high the joints are and how to reach the back of the building.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Place
- Rainham (RM13)
- Region
- Greater London
- Cover
- One year on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Landlords, agents and businesses in Rainham
Housing providers, facilities teams and property managers book us too in Rainham and across Greater London. Several sites can go on one quote, and we’re fully insured.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
Your questions about external mastic in Rainham
Can you do external mastic in Rainham?
Yes. Our work covers London and the South East, and Rainham is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear quote.
I let a flat near Rainham (Essex) station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
Will there be a smell?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
How much does external mastic cost in Rainham?
Size, access and the old material all affect the cost. Ask us for a quote and we’ll talk you through it.
Do I need to be at home?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Why is there a gap in my brick wall?
Most straight vertical gaps in brickwork are movement joints. It lets the bricks expand without cracking.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Rainham buildings and the weather
Historic houses like Rainham Hall (about 0.2 miles west) are a reminder that the area around Rainham has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
For landlords with property near Rainham (Essex) station, split movement joints are easy to miss on a rental until damp shows inside. For site and facilities teams at buildings such as Rainham Village Primary School, its movement joints, gutters and trims need looking after like any other building’s. Homes close to Church of St Helen and St Giles include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Rainham is about 4 miles south of Romford, in Greater London. Whether you’re in the middle of Rainham or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 764 places across Greater London, large and small. You can also see our page for London, about 13 miles away.
Work in RM13 works the same way as everywhere else we cover. Whether your property is on New Road, Ferry Lane and Wantz Lane or anywhere close by, our applicators can take on the job. Other places close to Rainham include South Hornchurch (1 mile north-west), Beam Park (1 mile west), Hornchurch Marshes (1 mile west), Dagenham Green (2 miles west) and Elm Park (2 miles north). We also work in nearby towns such as London (13 miles west), City of Westminster (15 miles west), Marylebone (15 miles west), St Pancras (13 miles west), Shoreditch (12 miles west) and Walthamstow (11 miles north-west).
What’s near Rainham
Around Rainham, our work takes us to homes and buildings near Harris Academy Rainham, The Chafford School and The Phoenix pub. Rainham has its own railway station: Rainham (Essex) station. Other landmarks nearby include St George's Hospital (2.3 miles north-east) and Erith Museum (2.6 miles south). For a walk, there’s Ingrebourne Marshes.
The process
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. It generally takes anything from a few hours to several days, depending on the building. In Rainham, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- 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.
Getting ready for the visit
- Move anything stored near the joints
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
Get a quote
To get a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. We will send you a clear quote before any work starts.
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Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
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.
Towns and villages near Rainham
Also in Rainham
Why act early in Rainham
A failed movement joint lets water into the wall, behind render and cladding. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Call for a quick quote and we’ll go through it with you.
Why us?
- We agree the colour with you first
- We leave the area clean and tidy
- White, clear, grey or coloured to suit, where the product allows
- Arbo and Everbuild products
Take a look at our cost guide and what customers say.
What we can’t put right
We will always be straight with you, so here’s what sealant can’t fix:
- Structural movement, which needs a surveyor or engineer
- Loose or hollow render, which needs re-rendering
- Adding movement joints to masonry that has none
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Surfaces we seal
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
- Façade panels
- Copings & trims
What the job involves on each surface
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod coloured to suit the wall.
Copings and trims
Coping joints that leak let water straight down into the wall. Sealing them early saves the wall below.