Greater London · England
External & façade joints in West Heath, Greater London
Problem with your movement joints in West Heath? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Sealant pulling away from one side of the joint
- Panel joints letting water in
- Joints pointed up with cement by mistake
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
External mastic in West Heath, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it, and we don’t skip that step. We work on render & cladding joints, copings & trims and brickwork movement joints, and common reasons people get in touch are movement joints with cracked, split or missing sealant and hard, crazed mastic that has stopped moving.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In West Heath, 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 email us.
- Where
- West Heath (DA7, DA16, SE2)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to West Heath
What else we do in West Heath
Common questions in West Heath
Do you cover West Heath for external mastic?
Yes, West Heath is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear quote.
Can you help a landlord with a rental near Abbey Wood station?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
Is it OK to fill a movement joint with cement?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. It needs a flexible sealant over backing rod.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned.
Do you guarantee your work?
Yes. All our work carries a 12-month guarantee.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or drop us an email.
Walls and rooflines in West Heath
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
Homes close to St Andrew's include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move. For site and facilities teams at buildings such as Hillsgrove Primary School, its movement joints, gutters and trims need looking after like any other building’s.
West Heath is about 1 mile north-east of Welling, in Greater London. If you need external mastic in West Heath, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We are based in Crawley and cover Greater London. West Heath is one of 764 places in Greater London we cover for external mastic. For nearby work, see our London page, about 10 miles away.
Our applicators cover all of the DA7, DA16 and SE2 postcode area for external mastic and the streets around it. Streets in the area include Hurst Lane, Hadlow Road and Denton Road, all of which we cover. Being close to the A206, West Heath is easy for our applicators to reach. We also cover the places around West Heath: Abbey Wood (1 mile north-west), Crook Log (1 mile south), Lessness Heath (1 mile north-east), Upton (1 mile south) and Bexleyheath (1 mile south-east). Further out, we also cover London (10 miles west), City of Westminster (12 miles west), Marylebone (12 miles west), Kensington (14 miles west), St Pancras (11 miles west) and Shoreditch (9 miles west).
Near you in West Heath
We work in homes and buildings around Co-op pub, Lesnes Abbey Woods and Welling School, among other places. West Heath’s nearest station is Abbey Wood station, roughly 1 mile north of the centre. Other landmarks nearby include Broadway Shopping Centre (1.7 miles south-east) and Bexley Hospital (1.4 miles south). For a walk, there’s Crossness Nature Reserve.
What we’re called out for in West Heath
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
Signs it’s time to call us include:
- Damp patches traced to an open external joint
- Joints where the bead has come unstuck
- Failed seals between different materials
- Movement joints filled with mortar instead of sealant
West Heath is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Questions to ask before you book
- How long the guarantee is
- How the joint is cleaned and prepared
- Which colour the sealant will be
- Is the old sealant removed completely?
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
What affects the cost of external mastic
Call for a quick quote. What matters most is:
- The type of sealant required
- How many rooms, windows or areas are involved
- When we can work, for business premises
- Whether there’s mould to deal with
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
What to tell us for a quote
Before you ask for a quote, have a think about:
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
- Any previous sealing or DIY work
- Where the job is, and your postcode
We quote each job on its own, so the first step is telling us about yours. Simply ring 0345 464 0079 or send us an email and describe the job, and photos are welcome.
Different surfaces, different methods
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap.
The process
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take anything from a few hours to several days, depending on the building. In a London area like West Heath, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- 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.
Before we arrive
- Mention any parking rules near the property
- Keep children and pets away from the work area
- Tell us about any previous sealing or DIY attempts
Getting a quote
Need a quote? Please phone 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and give you a clear price before we start.
Advice
What we can’t put right
New sealant cannot fix everything, and we will tell you before we start. It won’t solve:
- 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
- Structural movement, which needs a surveyor or engineer
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
Surfaces we seal
- Joints between brick and frames
- Façade panels
- Concrete & block
- Render & cladding joints
- Copings & trims
- Brickwork movement joints