Greater London · England
Little Woodcote External Mastic
External mastic in Little Woodcote from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Brick movement joints where the sealant has split
- Old sealant gone brittle and cracked
- Moss and dirt in joints with no sealant left
External mastic in Little Woodcote
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We inspect them, agree which need doing and reseal with a weatherproof, flexible sealant in a colour to suit. If you have movement joints filled with mortar instead of sealant and weeds or debris growing in open joints, we can put it right, whatever the surface.
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 Little Woodcote, it’s worth checking who is responsible for the outside before booking.
Big or small, you get the same 12-month guarantee.
- Where
- Little Woodcote (SM5, CR8, SM6)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How it works
You don’t need to clear the whole room or building before we come, only the area right around the joints. Everything nearby is protected, and the work takes a few hours for a handful of joints, longer for a whole elevation in most cases. 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 start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- 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.
Getting ready for the visit
- Move anything stored near the joints
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
Getting a quote
If you’re in Little Woodcote and need external mastic, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Advice
DIY versus a professional finish
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Your questions about external mastic in Little Woodcote
I let a flat near Woodmansterne 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 send you a clear quote.
Is parking an issue for external mastic in Little Woodcote?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
What colours does the sealant come in?
The sealant colour is picked to suit the wall so the joint blends in. There’s a wide choice of exterior colours.
How do you reach high-level joints?
That depends on the building and the joints. Where joints can be reached safely, we’ll do them. Tell us about the building and we will confirm what access is needed.
What’s an expansion joint in brickwork?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move, and it should be sealed with a flexible sealant.
How much does external mastic cost in Little Woodcote?
Every job is different, so each one gets its own quote. For a quick quote, call 0345 464 0079 or email us and let us know what needs doing and where.
How long before the joint can be used?
Cure times vary by product and the temperature. We tell you how long to leave it before we go.
Do the sealants smell?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
Quotes for external mastic in Little Woodcote
We quote each job individually. These are the things that affect it:
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
- The size of the job
- Mould in or behind the old joints
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Where the job is, and your postcode
- Photos by email, if that is easy
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, call 0345 464 0079 or send us an email.
When it is not the sealant
We will not take on work that won’t last, so these are the limits:
- Cracking across the wall rather than at a joint
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Subsidence or other structural problems
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
Where we work in Little Woodcote
- Façade panels
- Concrete & block
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
- Render & cladding joints
Keeping the joints in good condition
Aftercare is simple:
- Show decorators and builders where the movement joints are
- Deal with leaking gutters that soak the joints below
- Walk round the building once a year and look at the joints
- Do not let climbing plants root in the sealant
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
How the job changes by surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. We reseal them with an exterior sealant suited to the material.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant if the joint can be cleared.
Do you need external mastic in Little Woodcote?
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. The joint cannot move, so the wall cracks somewhere else instead.
Signs it’s time to call us include:
- Water getting into walls through failed joints
- Leaking joints around cladding and façade panels
- Brick movement joints where the sealant has split
- Rigid filler in a joint that should flex
If you live in an older home near St. Patrick's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before you book
- Which sealant they’ll use, and why
- How the colour is chosen
- What the cure time is
- Is the old sealant removed completely?
Nearby places to Little Woodcote
Also in Little Woodcote
Outside joints around Little Woodcote
With historic houses such as Nonsuch Mansion (about 3.3 miles north-west) nearby, there’s older building stock in the area around Little Woodcote as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. 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.
Little Woodcote is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you let a flat or house near Woodmansterne station, outside joints that have cracked can let damp into a rental, so check them between lets.
Little Woodcote is about 2 miles west of Purley, in Greater London. Anywhere in SM5, our applicators can take on external mastic. Our Greater London coverage runs to 764 places, Little Woodcote among them. There’s also a page for London, roughly 11 miles from Little Woodcote.
We cover every part of SM5, CR8 and SM6 for external mastic and the streets around it. You’ll find streets such as Woodmansterne Lane, Little Woodcote Lane and Oaks Track, all of which we cover. We also cover the places around Little Woodcote: Woodcote Green (1 mile east), Woodcote (1 mile east), Peaks Hill (1 mile east), Roundshaw (2 miles north-east) and Woodmansterne (2 miles south). Further out, we also cover London (11 miles north), City of Westminster (12 miles north), Marylebone (12 miles north), Kensington (11 miles north), St Pancras (13 miles north) and Shoreditch (13 miles north).
Near you in Little Woodcote
Locally, jobs take us to homes and businesses close to Wallington High School for Girls, Laleham Lea School and Carshalton Park. Little Woodcote’s nearest station is Woodmansterne station, about 1.3 miles south of the centre. Nearby you’ll also find Centrale Croydon (3.6 miles north-east) and Queen Mary's Hospital For Children (0.9 miles north-west). Green spaces nearby include Roundshaw Downs and Duppas Hill.