Greater London · England
Goodmayes External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Goodmayes, backed by a one-year guarantee. Ask us for a quote.
- Leaking joints around cladding and façade panels
- Damp patches traced to an open external joint
- Hard, crazed mastic that has stopped moving
External mastic in Goodmayes
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. If you have panel joints letting water in and joints with sealant missing in places, we can help, whatever the surface.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so one failed joint can cause damp for more than one household. In a converted house in Goodmayes, it’s worth checking who is responsible for the outside before booking.
There’s a 12-month guarantee on every job.
- Where
- Goodmayes (IG3, RM8, RM6)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Do you need external mastic in Goodmayes?
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
These are the problems we are asked about most:
- Sealant pulling away from one side of the joint
- Panel joints letting water in
- Gaps where render, brick and frames meet
- Damp patches traced to an open external joint
If you look after a building such as Goodmayes Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Questions to ask before booking
- Which sealant they’ll use, and why
- How the joint is cleaned and prepared
- Who does the work, and how experienced they are
- Whether they seal over old material or remove it
DIY sealant or a professional job?
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, and the work is guaranteed for a year.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Leave it or put it right?
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner so it’s worth doing right. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in Goodmayes.
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, call 0345 464 0079 or send us an email for an honest opinion and a quote.
What you get with us
- ARBOMaster approved applicator
- 20+ years of sealant experience
- Old sealant always removed completely
- We are fully insured
Take a look at our cost guide and what customers say.
Walls and rooflines in Goodmayes
Historic houses like Eastbury Manor House (about 2.1 miles south) are a reminder that the area around Goodmayes has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. 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.
If you let a flat or house near Goodmayes station, split movement joints are easy to miss on a rental until damp shows inside. As a London address, Goodmayes can be tricky for parking: let us know about parking bays, permits or a driveway.
Goodmayes is about 2 miles north of Barking, in Greater London. We provide external mastic to homes and businesses in Goodmayes and the surrounding area, as part of our work across Greater London. Goodmayes is one of 764 places in Greater London we cover for external mastic. London is on our list too, about 10 miles from Goodmayes.
Work in IG3, RM8 and RM6 works the same way as everywhere else we cover. If you need external mastic at a property on High Road, Green Lane and Essex Road or anywhere close by, our applicators can take on the job. Main roads around Goodmayes include the A1083. We also cover the places around Goodmayes: Little Heath (1 mile north), Aldborough Hatch (1 mile north), Chadwell Heath (2 miles north-east), Becontree (2 miles south-east) and Becontree Heath (2 miles east). Within a short drive, we also cover London (10 miles south-west), City of Westminster (12 miles west), Marylebone (12 miles west), Kensington (14 miles west), St Pancras (10 miles west) and Shoreditch (9 miles west).
Landmarks near Goodmayes
Locally, jobs take us to homes and businesses close to The Eva Hart pub, South Park and Mayfield School, among other places. There’s a railway station in Goodmayes itself: Goodmayes station. Well-known places in the area include Redbridge Museum (1.7 miles west) and Goodmayes Hospital (0.9 miles north). For a walk, there’s Hollow Pond and Scrattons Eco Park.
What the job involves on each surface
Render joints
Render has movement joints and stop beads that need sealing. We reseal them with a flexible exterior sealant that suits the render colour.
Cladding and façade panels
Panels heat up and cool down quickly, so the joints work hard every day. The sealant is chosen with that in mind.
Questions from Goodmayes
Is parking a problem for a job in Goodmayes?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Do you cover Goodmayes for external mastic?
Yes. We work across London and the South East, and Goodmayes is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
What is backing rod for?
Backing rod goes into deeper joints as a matter of course. It sets the sealant depth and prevents three-sided bonding.
Where is Mr Mastic based?
We work from Crawley. We cover Goodmayes and the rest of Greater London, along with the rest of our area.
How much does external mastic cost in Goodmayes?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and we’ll quote it together.
When something else is needed
We will not take on work that will not last, so these are the limits:
- Movement that is more than a sealant joint can take
- Cracks in the bricks or render themselves, away from the joints
- Rising or penetrating damp from elsewhere in the wall
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
What we seal
- Brickwork movement joints
- Façade panels
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
Towns and villages near Goodmayes
Also in Goodmayes
For landlords and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
If you manage several properties in or around Goodmayes, several properties can go on one quote. Send us the addresses and the work at each, and photos by email help.
How it works
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. The job generally takes anything from a few hours to several days, depending on the building, and we tell you how long to leave it before we go. For a job in Goodmayes, parking and access are the things to plan: let us know about parking, the floor we’ll 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.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for 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.
How to prepare
- Let us know if you’ve seen damp or leaks
- Let us know about earlier repairs to the joints
- Mention any tricky access
Ask for a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.