Greater London · England
External & façade joints in Brasted, Greater London
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Brasted. Fully insured, ARBOMaster approved and guaranteed for a year.
- Rain getting behind render or cladding at a joint
- Leaking joints around cladding and façade panels
- Brick movement joints where the sealant has split
Leave it or put it right?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Why Brasted customers choose us
- White, clear, grey or coloured to suit, where the product allows
- Sealant colour chosen to suit
- More than 20 years in sealant work
- Homes, businesses and hotels
About our external mastic in Brasted
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, leaving it bonded to two faces so it can move with the wall. If you’re dealing with rigid filler in a joint that should flex and sealant that has lost its bond to the brick or render, we can put it right.
Modern London flats rely on sealed movement joints and cladding joints. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall, and both kinds of building are found across London.
Big or small, you get the same 12-month guarantee.
- Location
- Brasted (TN16)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a handful of joints, longer for a whole elevation. 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.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Keep children and pets away from the work area
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Related advice
How the job changes by surface
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out.
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. We choose the product to suit.
Other services in Brasted
What sealant work can’t fix
New sealant cannot fix everything, and we will tell you before any work starts. Sealant won’t put right:
- Subsidence or other structural problems
- Cracks in the bricks or render themselves, away from the joints
- Rising or penetrating damp from elsewhere in the wall
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Copings & trims
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
For landlords and businesses
For anyone letting property in or around Brasted, several properties can be quoted together. Send us the addresses and the work at each.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Common questions in Brasted
Can you help a landlord with a rental near Dunton Green station?
Yes. We work for landlords and agents as well as householders, and several properties can go on one quote. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
Can parking be tricky for a visit in Brasted?
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.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides, primed where needed.
Can I add another job to the visit?
Of course. Combining jobs makes good use of the visit.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
How often do external joints need resealing?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
Do you guarantee your work?
Yes, always. There’s a 12-month guarantee on every job, large or small.
Brasted buildings and the weather
With historic houses such as Quebec House (about 1.5 miles south-west) nearby, there’s older building stock in the area around Brasted as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For an older house near a landmark such as Church of St Martin, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Letting a property close to Dunton Green station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. Brasted is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Brasted is about 3 miles west of Sevenoaks, in Greater London. Wherever you are in the TN16 postcode area, we cover external mastic for homes and businesses. 764 places in Greater London are on our list. You can also see our page for Crawley, roughly 17 miles from Brasted.
We cover every part of the TN16 postcode area for external mastic. Streets in the area include High Street, Station Road and Watermill Close, all of which we cover. Neighbouring places we cover for external mastic include Sundridge (1 mile east), Brasted Chart (1 mile south), Chipstead (2 miles east), Chevening (2 miles north-east) and Bessels Green (2 miles east). Further out, we also cover Orpington (7 miles north), New Cross (15 miles north-west), Thornton Heath (13 miles north-west), Croydon (11 miles north-west), East Dulwich (15 miles north-west) and Plumstead (15 miles north).
What’s near Brasted
Typical jobs here are in homes near The White Hart pub and the streets around them. Brasted’s nearest station is Dunton Green station, about 3.1 miles north-east. Other landmarks nearby include Sevenoaks Museum (3.8 miles east) and Tandridge Priory (3.8 miles south-west). For a walk, there’s Betsom's Hill and Dryhill Nature Reserve.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Look over the joints every year, ideally after winter
- Clear growth from the base of walls and joints
- Keep high-pressure jets off the joints
- Make sure movement joints aren’t pointed over
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal with no damage behind it to deal with.