Greater London · England
External & façade joints in Rush Green, Greater London
Professional external mastic in and around Rush Green, with every bit of old sealant taken out first and a 12-month guarantee.
- Failed sealant between panels on a façade
- Joints where the bead has come unstuck
- Damp patches traced to an open external joint
Leave it or put it right?
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Rush Green, the repair is bigger than a sealant job.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Why choose Mr Mastic in Rush Green
- We never seal over old sealant
- Arbo and Everbuild products
- ARBOMaster approved applicator
- A 12-month guarantee on all work
See what affects the cost or our reviews.
How we handle external mastic in Rush Green
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We strip the joint back and start again. If you are dealing with joints where the bead has come unstuck and weeds or debris growing in open joints, we can put it right, 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. For a flat in Rush Green, check the lease for who looks after the outside.
Big or small, you get the same 12-month guarantee in Rush Green and across Greater London.
- Where
- Rush Green (RM7, RM1, RM12)
- Wider area
- Greater London
- Cover
- One year on every job
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Walls and rooflines in Rush Green
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. In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts.
Rush Green is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. For landlords with property near Romford station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Rush Green is about 1 mile south-west of Romford, in Greater London. Whether you are in the middle of Rush Green or further out, external mastic is available for homes and businesses alike. Across Greater London, we cover 764 places, Rush Green among them. You can also see our page for London, about 12 miles away.
All of RM7, RM1 and RM12 is within our area for external mastic, from the main roads to the quietest streets. You will find streets such as Crow Lane, Union Road and Maldon Road, all of which we cover. Neighbouring places we cover for external mastic include Romford (1 mile north-east), Becontree Heath (1 mile west), Chadwell Heath (1 mile north-west), Elm Park (2 miles south-east) and Becontree (2 miles south-west). We also work in nearby towns such as London (12 miles west), City of Westminster (14 miles west), Marylebone (14 miles west), St Pancras (13 miles west), Shoreditch (11 miles west) and Walthamstow (9 miles west).
Landmarks near Rush Green
Around Rush Green, our work takes us to homes and buildings near Harrow Lodge Park, The Moon & Stars pub and St Edward's Church of England Academy, among other places. Rush Green’s nearest station is Romford station, about 0.7 miles north-east. Nearby you’ll also find Upminster Tithe Barn Museum of Nostalgia (3.6 miles east) and The Brewery (0.7 miles north-east). For a walk, there’s The Chase Nature Reserve.
Nearby places to Rush Green
Also in Rush Green
When it is not the sealant
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
- Cracking across the wall rather than at a joint
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in Rush Green
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Façade panels
- Brickwork movement joints
What we do, step by step
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours to a few days, depending on the length of joint and the access. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Rush Green. It helps if you can point us to a visitor permit or a bay close to the door.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Keep children and pets away from the work area
- Tell us about any water getting in
How to get a quote
Asking for a quote is easy: tell us what needs doing and where. Photos by email help us understand the job, and we will take it from there.
Related advice
What we’re called out for in Rush Green
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
People normally contact us when they notice something like this:
- Hard, crazed mastic that has stopped moving
- Joints with sealant missing in places
- Cracked joints where brick meets render or frames
- Rain getting behind render or cladding at a joint
Homes close to St Augustine of Canterbury Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Before you book anyone
- Whether they seal over old material or remove it
- How the colour is chosen
- When the joint can take water or movement
- Who turns up on the day
How the job changes by surface
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind.
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
For landlords and businesses
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together, and we are fully insured.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
How we quote for external mastic
We quote each job individually. This is what makes a difference:
- The type of sealant required
- How much there is to do
- Access and height
- The old material and how stubborn it is
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first and give you a clear quote before any work starts.
What to tell us for a quote
To make quoting easier, please include:
- The problem you’ve noticed
- Whether it has been sealed before
- Photos by email, if that is easy
- Where the property is
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or drop us an email.
FAQs for Rush Green
Is parking an issue for external mastic in Rush Green?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
I let a flat near Romford station. Can you help?
Yes. We work for landlords and letting agents as well as householders, and several properties can be quoted together. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. We will talk through colour options before work begins from the range available.
Will the old sealant be removed?
Yes, always, and completely. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Do you use backing rod?
That is backing rod, a closed-cell foam. It stops the sealant going in too deep and bonding to three sides.
Where is Mr Mastic based?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.