Greater London · England
Beddington External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Beddington and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Old sealant gone brittle and cracked
- Cracked joints where brick meets render or frames
- Plants rooting in failed movement joints
External mastic for homes and businesses in Beddington
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint does not stand out. If you’re dealing with cracked joints where brick meets render or frames and weathered mastic that no longer stretches, we can help, whatever the surface.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Beddington, joints up high may need ladders or other access, which is worth talking through when you book.
Your job is guaranteed for a year, as with all our work.
- Place
- Beddington (CR0, SM6, CR9)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Beddington 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Schools such as Beddington Park Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Beddington is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Beddington is about 2 miles west of Croydon, in Greater London. Homes, rented property, offices and hotels in Beddington is covered for external mastic, old or new, large or small. The work is guaranteed for a year. Beddington is one of 764 places in Greater London where we work. We also work in London, around 9 miles away.
Postcode districts we cover here for external mastic: CR0, SM6 and CR9. You’ll find streets such as Guy Road, Mill Lane and Church Lane, and we cover them all. If you are just outside Beddington, we cover Bandonhill (1 mile south), Wallington (1 mile south-west), Waddon (1 mile south-east), Old Town (1 mile east) and Roundshaw (1 mile south). Further out, we also cover London (9 miles north), City of Westminster (10 miles north), Marylebone (10 miles north), Kensington (9 miles north), St Pancras (11 miles north) and Shoreditch (11 miles north).
Local landmarks in Beddington
We work in homes and buildings around The Archbishop Lanfranc School, Waddon Ponds and The Plough pub. For rail, the closest station is Waddon station, about 0.7 miles east. Other landmarks nearby include Croydon University Hospital (1.6 miles north-east) and Croydon Airport Visitor Centre (1.2 miles south-east). Green spaces nearby include Wilderness Island and Duppas Hill.
Also near Beddington
Other services in Beddington
Common problems we fix in Beddington
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and make things worse.
Most people get in touch after spotting something like this:
- Joints where the bead has come unstuck
- Weathered mastic that no longer stretches
- Damp patches traced to an open external joint
- Joints pointed up with cement by mistake
For an older house near a landmark such as Parish Church of St Mary the Virgin, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Before you book anyone
- Whether VAT is included
- What happens if they find a problem under the old sealant
- Who turns up on the day
- Whether you can choose the colour
Why act early in Beddington
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 so it’s worth doing right. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Beddington, the repair is bigger than a sealant job.
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.
Why Beddington customers choose us
- ARBOMaster approved applicator
- We leave the area clean and tidy
- 12-month guarantee on every job
- Domestic, commercial and hotel work
Read what affects the cost and our reviews.
Questions from Beddington
Is Beddington in your area for external mastic?
Yes, Beddington is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
Do you work for landlords with property near Waddon station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
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.
How do I get a quote for external mastic in Beddington?
Size, access and the old material all affect the cost. Call for a quick quote and we will talk you through it.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We will tell you what we’re using and why.
Do the sealants smell?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
What is backing rod for?
We fit closed-cell backing rod wherever the joint depth needs controlling. It controls the depth and stops the sealant bonding to the back.
Are you insured?
Yes. We are fully insured, and we have been doing sealant work for more than 20 years.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
How it works
Most of a good job is in the preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it usually takes anything from a few hours to several days, depending on the building. In Beddington, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Clear items away from the joints we’re working on
- Keep pets and children clear of the area while we work
Get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved and send you a clear quote.
Advice
How the job changes by surface
Copings and trims
Coping and trim joints face rain and sun head on. We reseal them with an exterior sealant suited to the material.
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. We prime where the product needs it.
Landlords, agents and businesses in Beddington
If you manage several properties in or around Beddington, several properties can be quoted together. Send us the addresses and the work at each.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- Act on the first splits you see
- Never let anyone fill a movement joint with mortar
- Fix overflowing gutters above sealed joints
- Point out the joints to other trades
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years so early resealing is worth it.