Greater London · England
External & façade joints in Chase Cross, Greater London
Our applicators work in Chase Cross on sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Sealant pulling away from one side of the joint
- Movement joints with cracked, split or missing sealant
- Joints pointed up with cement by mistake
External mastic in Chase Cross, done properly
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a colour to suit. Common call-outs are for brick movement joints where the sealant has split and rain getting behind render or cladding at a joint, across façade panels, brickwork movement joints and render & cladding joints. Mr Mastic is a specialist sealant company, not a general handyman, which means external mastic in Chase Cross is done by people who seal joints every day.
Modern London flats rely on sealed movement joints and cladding joints. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall, and both kinds of building are found across London.
All of our work is guaranteed for twelve months, in Chase Cross and everywhere else we cover.
- Where
- Chase Cross (RM5, RM1, RM4)
- Region
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear price before any work starts
- Telephone
- 07833 053749
- Last updated
- 26 October 2026
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. Converted houses in London often have a bathroom above someone else’s living room, 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 Chase Cross.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why us?
- Trusted Arbo and Everbuild sealants
- Sealant colour chosen to suit
- Tidy, careful work
- Any old sealant cut out fully, not covered over
Read our cost guide and customer reviews.
Landlords, agents and businesses in Chase Cross
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes a few hours for a handful of joints, longer for a whole elevation, including the tidy-up. In a London area like Chase Cross, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- 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
- Try not to wet indoor joints just before the visit
- Let us know if you’ve seen damp or leaks
- Keep children and pets away from the work area
How to get a quote
Getting a quote is simple: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand, and we will take it from there.
Related advice
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. Our tips:
- Have failed joints looked at early
- Clear growth from the base of walls and joints
- Tell anyone working on the walls about the movement joints
- Keep movement joints as flexible joints, not mortar
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Act while the splits are small. Then it’s a straightforward cut-out and reseal before water has had years to get in.
When it isn’t the sealant
We will always be straight with you, so here’s what new sealant will not do:
- Walls that need new movement joints cut into them
- Render that’s blown, hollow or coming away
- Cracking across the wall rather than at a joint
If in doubt, ring 07833 053749 or send us an email and we’ll say what we think before booking.
What we seal
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
- Façade panels
Also near Chase Cross
Also in Chase Cross
What the job involves on each surface
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap so the sealant isn’t too deep.
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. If that’s happened, we rake it out and reseal it properly where it can be done safely.
Chase Cross buildings and the weather
In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Chase Cross is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Homes close to St James include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Chase Cross is about 2 miles north of Romford, in Greater London. For external mastic in and around Chase Cross, please phone 07833 053749 or email us for a quick quote. We cover Greater London from our Crawley base. Across Greater London, we cover 786 places, Chase Cross among them.
We work across the RM5, RM1 and RM4 postcode area for external mastic and the streets around it. External mastic is available to properties on Merlin Road, Avelon Road and Vernon Road and the roads around them. If you are just outside Chase Cross, we cover Havering-atte-Bower (1 mile north-east), Redbridge (2 miles west), Stapleford Abbotts (2 miles north), Lambourne End (3 miles north-west) and Chigwell Row (3 miles west). Larger places within reach include London (14 miles south-west), Marylebone (15 miles south-west), St Pancras (14 miles south-west), Shoreditch (12 miles south-west), Walthamstow (9 miles west) and Hoxton (12 miles south-west).
Landmarks near Chase Cross
In Chase Cross, that means homes and buildings near Havering Country Park, Clockhouse Primary School and Colley Rowe Inn, among other places. Chase Cross’s nearest station is Gidea Park station, roughly 2.1 miles south-east. Other landmarks nearby include Harold Wood Hospital (2.3 miles south-east) and Romford Shopping Hall (1.8 miles south). The countryside around Chase Cross includes Bedfords Park.
When to call us in Chase Cross
Buildings move more than people expect. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
These are the problems we’re asked about most:
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
- Joints where the bead has come unstuck
- Joints pointed up with cement by mistake
Rented homes near Gidea Park station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What to look for in a quote
- Is VAT in the price?
- Which sealant they’ll use, and why
- How the colour is chosen
- When the joint can take water or movement
Common questions in Chase Cross
Is Chase Cross in your area for external mastic?
Yes. We work across London and the South East, and Chase Cross is part of that. Just phone 07833 053749 or email us with a few details of the job.
Can you help a landlord with a rental near Gidea Park station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 07833 053749 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
How long before the joint can be used?
Different products cure at different speeds, so please follow the time we give you.
Do you work at height?
It depends on the building. Tell us the height, the number of joints and what’s below them and we’ll confirm how they can be reached safely.
How often do external joints need resealing?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away and have them redone then.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
What information do you need?
A short description and the location. If we need more, we will ask.
Can a movement joint be filled with mortar?
No. Cement or mortar cannot stretch, so the joint stops doing its job. Where a joint has been mortared, it can often be raked out and sealed properly.