Greater London · England
External & façade joints in Cranford, Greater London
Problem with your movement joints in Cranford? We remove the old material, prepare the joints and seal them properly.
- Rigid filler in a joint that should flex
- Hard, crazed mastic that has stopped moving
- Brick movement joints where the sealant has split
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
About our external mastic in Cranford
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we’ll confirm what’s needed to reach them safely. We’re often asked to deal with joints with sealant missing in places and panel joints letting water in, on façade panels, joints between brick and frames and render & cladding joints.
Modern London flats rely on sealed movement joints and cladding joints. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall.
You get a one-year guarantee, the same in Cranford as everywhere else we work.
- Where
- Cranford (TW4, TW5, UB3)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
When to call us in Cranford
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
It’s worth asking for a quote if you see:
- Moss and dirt in joints with no sealant left
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
- Joints where the bead has come unstuck
As a London address, Cranford can be tricky for parking: let us know about parking bays, permits or a driveway.
Comparing quotes
- Is VAT in the price?
- Are they insured?
- What happens if they find a problem under the old sealant
- How long the guarantee is
DIY versus a professional finish
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
What else we do in Cranford
Outside joints around Cranford
London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts. Historic houses like Osterley House (about 2.6 miles east) are a reminder that the area around Cranford 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.
For site and facilities teams at buildings such as Cranford Primary School, its movement joints, gutters and trims need looking after like any other building’s. Rented homes near Hayes & Harlington station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
Cranford is about 2 miles north of Feltham, in Greater London. If you need external mastic in Cranford, please ring 0345 464 0079 or drop us an email for a quick quote. We cover Greater London from our Crawley base, Cranford included. Across Greater London, we cover 764 places, and Cranford is one of them. You can also see our page for London, roughly 14 miles from Cranford.
Postcode districts we cover here for external mastic: TW4, TW5 and UB3. Local streets include Ely Road, Park Lane and The Avenue. If you are just outside Cranford, we cover Hatton (1 mile south-west), Harlington (1 mile north-west), Heathrow (2 miles west), Feltham (2 miles south) and Sipson (2 miles north-west). Within a short drive, we also cover London (14 miles east), City of Westminster (11 miles east), Marylebone (12 miles east), Kensington (9 miles east), St Pancras (13 miles east) and Shoreditch (15 miles east).
Local landmarks in Cranford
Locally, jobs take us to homes and businesses close to Cranford Community College, The Queen's Head pub and Hounslow Heath and the streets around them. The nearest railway station is Hayes & Harlington station, roughly 1.9 miles north. A little further out are Hounslow Hospital (1.6 miles east) and Treaty Centre (2 miles east). For a walk, there’s Garden Lake and Northala Fields.
What happens on the day
Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the building. For a job in Cranford, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- First, the joints are inspected and the access agreed.
- 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
- Mention any parking rules near the property
- Mention any tricky access
Getting a quote
If you’re in Cranford and need external mastic, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and you’ll get a clear quote before we start.
Related advice
Honest limits
To be straight with you, there are a few things sealant won’t fix:
- Cracks in the bricks or render themselves, away from the joints
- Failed render or damaged cladding panels
- Adding movement joints to masonry that has none
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Joints and surfaces we work on
- Brickwork movement joints
- Concrete & block
- Façade panels
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
How the job changes by surface
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. We reseal them with an exterior sealant suited to the material.
What happens if it’s left?
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Cranford, the repair is bigger than a sealant job.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Why us?
- We leave the area clean and tidy
- Over 20 years’ experience
- White, clear, grey or another colour, product permitting
- We never seal over old sealant
Your questions about external mastic in Cranford
Can you do external mastic in Cranford?
Yes, Cranford is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing.
Can you help a landlord with a rental near Hayes & Harlington station?
Yes. We work for landlords and agents as well as householders. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will send you a clear quote.
Can you quote for more than one area?
Yes. More than one area can go on one quote.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us.
What does external mastic cost?
It depends on the job, so we quote each one individually. To get one, call 0345 464 0079 or send us an email with a short description of the job.
Will there be a smell?
Possibly a little. It fades as the sealant cures.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Is there a guarantee?
Yes. Each job is guaranteed for twelve months.