Greater London · England
External & façade joints in Hounslow, Greater London
We cover Hounslow for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Leaking joints around cladding and façade panels
- Movement joints with cracked, split or missing sealant
- Joints pointed up with cement by mistake
Why act early in Hounslow
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render, so the problem grows beyond the joint itself. 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 Hounslow.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Why book with us
- 180+ five-star Google reviews
- A 12-month guarantee on all work
- We leave the area clean and tidy
- Approved under the ARBOMaster scheme
Read our cost guide and customer reviews.
How we handle external mastic in Hounslow
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing. If you are dealing with failed sealant between panels on a façade and water getting into walls through failed joints, we can put it right.
London’s terraces and conversions often share walls, gutters and downpipes with their neighbours, so a leaking gutter joint or failed wall joint can affect more than one home. In a converted house in Hounslow, it’s worth checking who is responsible for the outside before booking.
You are covered for a year from the day we finish. If anything isn’t right with it, ring 0345 464 0079 or drop us an email.
- Place
- Hounslow (TW13)
- Region
- Greater London
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Signs you need external mastic in Hounslow
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 new sealant then lets go long before it should.
Most people get in touch when they notice something like this:
- Sealant pulling away from one side of the joint
- Failed sealant between panels on a façade
- Moss and dirt in joints with no sealant left
- Rain getting behind render or cladding at a joint
If you look after a building such as Meadhurst Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- What guarantee comes with the work
- Whether they’re fully insured
- Who turns up on the day
- What product goes in the joint
Hounslow buildings and the weather
With historic houses such as Strawberry Hill House (about 4 miles east) nearby, there’s older building stock in the area around Hounslow as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts.
If you let a flat or house near Sunbury station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. As a London address, Hounslow can be tricky for parking: let us know about parking bays, permits or a driveway.
Hounslow is about 1 mile north of Sunbury-on-Thames, in Greater London. We carry out external mastic for homeowners, landlords and businesses in Hounslow and nearby. Our Greater London coverage runs to 764 places, Hounslow among them. We also work in London, about 15 miles from Hounslow.
Postcode districts we cover here for external mastic: TW13. We also cover the places around Hounslow: Ashford Common (1 mile south-west), Littleton Common (1 mile south-west), Sunbury-on-Thames (1 mile south), Feltham (1 mile north-east) and Bedfont (1 mile north). Larger places within reach include London (15 miles east), City of Westminster (13 miles north-east), Marylebone (14 miles north-east), Kensington (11 miles north-east), St Pancras (15 miles north-east) and Hampstead (14 miles north-east).
Landmarks near Hounslow
Typical jobs here are in homes near Sunbury Park, Sunbury Manor School and Sunbury Manor School, among other places. The closest station to Hounslow is Sunbury station, roughly 0.9 miles south-east. A little further out are Treaty Centre (3.8 miles north-east) and Ashford Hospital (1.9 miles north-west). Green spaces nearby include St Ann's Hill and Staines Reservoirs.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Point out the joints to other trades
- Check external joints each spring
- Fix overflowing gutters above sealed joints
- Keep movement joints as flexible joints, not mortar
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
Nearby places to Hounslow
More services for Hounslow
Common questions in Hounslow
Do you cover Hounslow for external mastic?
Yes. Our work covers London and the South East, and Hounslow is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Can you help a landlord with a rental near Sunbury station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Is it OK to fill a movement joint with cement?
No. Rigid materials cannot move with the wall, so the joint stops doing its job. If it has already been filled, we can normally cut it out and reseal it.
Can you reach joints on upper floors?
It depends on the building. Tell us the height, the number of joints and what’s below them, and we will confirm what access is needed.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
Are you fully insured?
Yes, we’re fully insured for domestic and commercial work.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. Then ring 0345 464 0079 or drop us an email.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and we will quote it together.
Quotes for external mastic in Hounslow
Some jobs are bigger than they look, and some smaller. The main factors:
- The old material and how stubborn it is
- The product the joint needs
- The number of rooms or windows
- Any mould that needs treating
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We’ll give you a clear price for the lot.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
- Where the job is, and your postcode
If you’re in Hounslow and need external mastic, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
DIY versus a professional finish
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
What a professional job adds is preparation and the right 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 sealant work can’t fix
Some problems need a builder, plumber or other trade rather than us:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracked brickwork or render that needs a builder or plasterer
- Adding movement joints to masonry that has none
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Where we work in Hounslow
- Render & cladding joints
- Façade panels
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
How it works
Good joint work is mostly preparation, so that is 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. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- 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.
Before we arrive
- On commercial sites, let us know about site rules
- Mention any parking rules near the property
- Keep pets and children clear of the area while we work
How to get a quote
We do not publish a price list. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or email us.