Greater London · England
External Mastic in Lampton
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Lampton and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Plants rooting in failed movement joints
- Cracked joints where brick meets render or frames
- Rigid filler in a joint that should flex
About our external mastic in Lampton
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. We work on render & cladding joints, concrete & block and façade panels, and people most often call us about leaking joints around cladding and façade panels and old sealant gone brittle and cracked.
Outside work in London starts with access: side passages, upper floors and where to park. In Lampton, joints up high may need ladders or other access, which is worth talking through when you book.
You’re covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Location
- Lampton (TW3, TW7, TW5)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Places near Lampton
More services for Lampton
What happens if it’s left?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and doesn’t last. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What you get with us
- White, clear, grey or coloured to suit, where the product allows
- Approved under the ARBOMaster scheme
- We agree the colour with you first
- We never seal over old sealant
See what affects the cost and customer reviews.
DIY sealant or a professional job?
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.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Walls and rooflines in Lampton
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Osterley House (about 1.1 miles north) are a reminder that the area around Lampton has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
For landlords with property near Hounslow station, outside joints that have cracked can let damp into a rental, so check them between lets. As a London address, Lampton can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Lampton is about 2 miles north-west of Twickenham, in Greater London. Wherever you are in the TW3 postcode area, our applicators can take on external mastic. Across Greater London, we cover 764 places, Lampton among them. For nearby work, see our London page (12 miles or so).
Here we cover the TW3, TW7 and TW5 postcode area for external mastic. If you need external mastic at a property on York Road, Star Road and Pears Road or anywhere close by, our applicators can take on the job. If you’re just outside Lampton, we cover Hounslow (1 mile south-east), Spring Grove (1 mile north-east), Osterley (1 mile north-east), Woodlands (1 mile south-east) and Heston (1 mile north-west). Larger places within reach include London (12 miles east), City of Westminster (9 miles east), Marylebone (10 miles east), Kensington (7 miles east), St Pancras (11 miles east) and Shoreditch (13 miles east).
What’s near Lampton
In Lampton, that means homes and buildings near Moon Under Water pub, Inwood Park and Kingsley Academy and the streets around them. The closest station to Lampton is Hounslow station, roughly 0.9 miles south. Other landmarks nearby include Museum of Army Music (1.4 miles south) and Hounslow Hospital (0.8 miles south-west). For a walk, there’s Long Wood and Garden Lake.
What happens on the day
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. In total, it normally takes a few hours for a handful of joints, longer for a whole elevation. In a London area like Lampton, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
- Mention any sign-in or site rules at work premises
Ask for a quote
Every job is quoted individually. Just call 0345 464 0079 or email us with the details, and photos are welcome.
Read more
Common questions in Lampton
Is parking a problem for a job in Lampton?
Parking in Lampton, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
I let a flat near Hounslow station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Do you work at height?
It depends on the building. Where joints can be reached safely, we will do them. Give us some details and we will confirm the access.
Why do you put foam in the joint first?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding, so the joint can move.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in, and for outside work we will agree access with you when we book.
Are you fully insured?
Yes, we are fully insured for domestic and commercial work.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Where do you work from?
We’re based in Crawley, and we work across South East England, London and Scotland.
What affects the quote in Lampton
The quote reflects the job in front of us. We look at:
- Whether the work is at height
- How many areas need sealing
- Mould in or behind the old joints
- The type of sealant required
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Asking for a quote
To make quoting easier, please include:
- Whether it’s a home or a business
- Any previous sealing or DIY work
- The address or postcode of the job
- The problem you’ve noticed
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
When to call us in Lampton
Some movement joints have been pointed up with mortar. The joint can’t move, so the wall cracks somewhere else instead.
Keep an eye out for any of the following:
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
- Damp patches traced to an open external joint
- Panel joints letting water in
For an older house near a landmark such as St Luke, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before you book
- How long to leave it before use
- How much experience the applicator has
- Whether you can choose the colour
- How hidden problems are handled
How to look after the new joints
So the new joints stay in good condition:
- Leave the joints unpainted unless we have said otherwise
- Look over the joints every year, ideally after winter
- Show decorators and builders where the movement joints are
- Act on the first splits you see
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.