Greater London · England
Furzedown External Mastic
External mastic for Furzedown and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Failed seals between different materials
- Movement joints filled with mortar instead of sealant
- Leaking joints around cladding and façade panels
How we handle external mastic in Furzedown
Joints in render and cladding are easy to overlook until a damp patch appears. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a colour to suit. If you have old sealant gone brittle and cracked and failed seals between different materials, we can put it right, whatever the surface.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Furzedown, joints up high may need ladders or other access, which is worth talking through when you book.
Every job is covered by a one-year guarantee, wherever you are in Greater London.
- Location
- Furzedown (SW16, SW17, CR4)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Have failed joints looked at early
- Keep water from gutters off the wall
- Make sure movement joints aren’t pointed over
- Point out the joints to other trades
Keep the joints clear of soil, plants and climbing growth. Damp material against the sealant shortens its life.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
Outside joints around Furzedown
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. 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 Tooting station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. Furzedown is in London, so parking needs planning: let us know about parking bays, permits or a driveway. Managing a site like Graveney School? Then its movement joints, gutters and trims need looking after like any other building’s.
Furzedown is about 3 miles east of Wimbledon, in Greater London. Wherever you are in the SW16 postcode area, we can carry out external mastic at your property. Across Greater London, we cover 764 places, Furzedown among them. Our London page covers work nearby (6 miles or so).
Jobs for external mastic in SW16, SW17 and CR4 works the same way as everywhere else we cover. We cover properties on Deal Road, Links Road and Seely Road and the roads around them. With the A216 close by, Furzedown is simple for us to get to. Neighbouring places we cover for external mastic include Streatham Park (1 mile north-east), Tooting (1 mile west), Tooting Bec (1 mile west), Streatham (1 mile east) and Colliers Wood (1 mile south-west). Further out, we also cover London (6 miles north-east), City of Westminster (6 miles north), Marylebone (6 miles north), Kensington (6 miles north-west), St Pancras (7 miles north) and Shoreditch (8 miles north-east).
Local landmarks in Furzedown
In Furzedown, that means homes and buildings near The Holland Tringham pub, Figge's Marsh and Furzedown Secondary School. For rail, the closest station is Tooting station, about 0.6 miles south-west. A little further out are St Benedict's Hospital (less than half a mile west) and London Sewing Machine Museum (0.9 miles north-west). Green spaces nearby include Battersea Park Lake and Knight's Hill.
FAQs for Furzedown
Can you do external mastic in Furzedown?
Yes, Furzedown 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, and we will give you a clear quote.
Do you work for landlords with property near Tooting station?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
How often do external joints need resealing?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Every job carries our 12-month guarantee.
Do you work at height?
That depends on how high the joints are and the ground below. Ground-floor joints are simple; for higher work, tell us about the building and we will confirm what’s needed.
Are you fully insured?
Yes. We’re fully insured.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Places near Furzedown
Other services in Furzedown
Why it’s worth doing now in Furzedown
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Combining jobs into one visit normally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in Furzedown
- 20+ years of sealant experience
- Experience in homes, commercial sites and hotels
- We agree the colour with you first
- White, clear, grey or coloured to suit, where the product allows
Take a look at how sealant jobs are priced and our reviews.
Different surfaces, different methods
Copings and trims
Coping joints that leak let water straight down into the wall. Sealing them early saves the wall below.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.
When it is not the sealant
A few problems are outside what sealant work can do:
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
- Structural movement, which needs a surveyor or engineer
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
Surfaces we seal
- Joints between brick and frames
- Concrete & block
- Façade panels
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
How we quote for external mastic
Call for a quick quote. What matters most is:
- Access and height
- Mould in or behind the old joints
- The product the joint needs
- Working hours on commercial sites
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The type of property
- Any access issues, like height or stairs
- If someone has resealed it before
- The problem you’ve noticed
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand.
Should I try it myself first?
A DIY attempt does not rule out a professional job. We remove it and do the joint properly.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The process
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours to a few days, depending on the length of joint and the access, depending on the amount of work. 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.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- The joint faces are cleaned and primed where the sealant needs it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- Tell us about any water getting in
- For business premises, tell us about site rules or sign-in
- Keep pets and children clear of the area while we work
Get a quote
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.