Greater London · England
Dagenham Green External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Dagenham Green, with a 12-month guarantee on every job. Ask us for a quote.
- Water getting into walls through failed joints
- Weeds or debris growing in open joints
- Panel joints letting water in
External mastic for homes and businesses in Dagenham Green
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it, and we do not skip that step. We work on façade panels, copings & trims and render & cladding joints, and the jobs we see most are movement joints filled with mortar instead of sealant and weathered mastic that no longer stretches.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so a leaking gutter joint or failed wall joint can affect more than one home. For a flat in Dagenham Green, check the lease for who looks after the outside.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Dagenham Green (RM9, RM10, RM13)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Walls and rooflines in Dagenham Green
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts.
In the older streets around St Martin's Church, the joints between older walls, newer extensions and the roofline need a sealant that can move. For landlords with property near Dagenham Dock station, outside joints that have cracked can let damp into a rental, so check them between lets. Dagenham Green is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Dagenham Green is about 1 mile south-west of Dagenham, in Greater London. Homes, rented property, offices and hotels in Dagenham Green can book us for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. We cover 764 towns and villages across Greater London. There’s also a page for London, about 11 miles away.
Jobs for external mastic in RM9, RM10 and RM13 works the same way as everywhere else we cover. We cover properties on New Road, Link Road and Ripple Road and the roads around them. We also cover Dagenham Dock (1 mile south-west), Beam Park (1 mile east), Hornchurch Marshes (1 mile south-east), Dagenham (1 mile north-east) and Castle Green (1 mile west). Larger places within reach include London (11 miles west), City of Westminster (13 miles west), Marylebone (13 miles west), Kensington (15 miles west), St Pancras (12 miles west) and Shoreditch (10 miles west).
Landmarks near Dagenham Green
Around Dagenham Green, our work takes us to homes and buildings near Dagenham Park Community School, Cross Keys pub and Parsloes Park and the streets around them. Dagenham Green has its own railway station: Dagenham Dock station. Well-known places in the area include Gallions Reach Shopping Park (3.3 miles west) and East End Women's Museum (3.2 miles west). Not far away are Scrattons Eco Park.
What affects the quote in Dagenham Green
There’s no set price list, because jobs vary so much. The quote depends on:
- Any mould that needs treating
- How many rooms, windows or areas are involved
- Any working-time requirements on site
- The size of the job
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will explain what it covers.
Helping us quote
When you contact us, it’s useful to know:
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- Access, such as stairs, a lift or height
- Where the job is, and your postcode
We quote each job on its own, so start by telling us what you need. Just call 0345 464 0079 or email us with the details and send pictures if you have them.
Also near Dagenham Green
Other services in Dagenham Green
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What we cannot put right
We will always be straight with you, so here’s what sealant can’t fix:
- Failed render or damaged cladding panels
- Structural movement, which needs a surveyor or engineer
- Cracking across the wall rather than at a joint
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Render & cladding joints
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
How the visit works
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours to a few days, depending on the length of joint and the access. For a job in Dagenham Green, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- First, the joints are inspected and the access agreed.
- 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.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Mention any sign-in or site rules at work premises
- Let us know about stairs, lifts or work at height
Get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.
Advice
What the job involves on each surface
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
What happens if it’s left?
Sealing over the top of old mastic doesn’t hold for long. New sealant doesn’t bond well to old, weathered sealant, so we always take the old sealant out. 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.
We don’t show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Why book with us
- We agree the colour with you first
- Tidy, careful work
- We’re fully insured
- 180+ five-star Google reviews
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Point out the joints to other trades
- Leave the joints unpainted unless we’ve said otherwise
- Fix overflowing gutters above sealed joints
- Do not let climbing plants root in the sealant
Don’t paint over the new sealant unless we have said the product is paintable. Paint can crack on a flexible joint, and paint can crack as the joint moves.
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.
Dagenham Green: your questions answered
Can parking be tricky for a visit in Dagenham Green?
Parking in Dagenham Green, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Can you help a landlord with a rental near Dagenham Dock station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Will the old sealant be removed?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
How long does the job take?
A typical job takes a few hours to a few days, depending on the length of joint and the access. We’ll confirm how long when we quote.
Do you work in Dagenham Green?
Yes. We cover Dagenham Green. For a quote, ring 0345 464 0079 or drop us an email.