Greater London · England
External Mastic in Toy's Hill
Sealing brickwork movement joints, render, cladding and façade joints in Toy's Hill, with a one-year guarantee on every job. Call for a quick quote.
- Rigid filler in a joint that should flex
- Panel joints letting water in
- Brick movement joints where the sealant has split
Honest limits
A few problems are outside what sealant work can do:
- Cracking across the wall rather than at a joint
- Subsidence or other structural problems
- Render that is blown, hollow or coming away
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Render & cladding joints
- Concrete & block
- Copings & trims
External mastic in Toy's Hill, done properly
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. If you’re dealing with weathered mastic that no longer stretches and sealant that has lost its bond to the brick or render, we can help.
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. For a flat in Toy's Hill, check the lease for who looks after the outside.
We stand behind the work with a one-year guarantee, so you’re covered after we’ve gone.
- Where
- Toy's Hill (TN16)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Towns and villages near Toy's Hill
What else we do in Toy's Hill
External mastic in Toy's Hill: local notes
Historic houses like Chartwell (about 1.1 miles west) are a reminder that the area around Toy's Hill has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking.
If you look after a building such as Ide Hill Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s. Letting a property close to Edenbridge station? Then split movement joints are easy to miss on a rental until damp shows inside.
Toy's Hill is about 4 miles south-west of Sevenoaks, in Greater London. We carry out external mastic for homeowners, landlords and businesses in Toy's Hill. Toy's Hill is one of 764 places in Greater London we cover. Crawley is on our list too, about 16 miles from Toy's Hill.
All of TN16 is within our area for external mastic, from the main roads to the quietest streets. That includes homes and businesses on Scords Lane and Puddledock Lane and the roads around them. Other places close to Toy's Hill include Ide Hill (1 mile east), Brasted Chart (1 mile north), Goathurst Common (2 miles east), Brasted (2 miles north) and Sundridge (2 miles north). We also work in nearby towns such as Orpington (10 miles north), Thornton Heath (14 miles north-west), Croydon (12 miles north-west), Bromley (12 miles north), West Norwood (15 miles north-west) and Beckenham (13 miles north-west).
Landmarks near Toy's Hill
We work in homes and buildings around Stubbs Wood Country Park and The Cock Inn, among other places. For rail, the closest station is Edenbridge station, roughly 3.2 miles south-west. Well-known places in the area include Hever Castle (3.9 miles south) and Tandridge Priory (3.5 miles west). Green spaces nearby include Dryhill Nature Reserve and Betsom's Hill.
Common problems we fix in Toy's Hill
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the joint eventually tears or comes away from one side.
The most common problems we see are:
- Moss and dirt in joints with no sealant left
- Cracked joints where brick meets render or frames
- Failed sealant between panels on a façade
- Brick movement joints where the sealant has split
As a London address, Toy's Hill can be tricky for parking: let us know about parking bays, permits or a driveway.
Questions to ask before you book
- How the joint is cleaned and prepared
- What the quote includes, VAT included or not
- Are they insured?
- Whether all the old sealant comes out first
Landlord and commercial work in Toy's Hill
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
How we quote for external mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Mould in or behind the old joints
- Any working-time requirements on site
- How many areas need sealing
- The type of sealant required
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs. Call for a quick quote and we will go through it with you.
Helping us quote
When you contact us, these details help:
- The type of property
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
- Roughly how big the job is
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or drop us an email.
Your questions about external mastic in Toy's Hill
Is parking an issue for external mastic in Toy's Hill?
Parking in Toy's Hill, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Do you cover Toy's Hill for external mastic?
Yes, Toy's Hill is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing, and we’ll send you a clear quote.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
Can a movement joint be filled with mortar?
No. A mortar-filled joint can’t move, so the wall cracks somewhere else instead. It needs a flexible sealant over backing rod.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few pictures.
How much does external mastic cost in Toy's Hill?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before any work starts.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Keeping the joints in good condition
Good habits help new joints last longer. Our tips:
- Leave the joints unpainted unless we’ve said otherwise
- Check external joints each spring
- Deal with leaking gutters that soak the joints below
- Tell anyone working on the walls about the movement joints
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. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach 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 fails, we can still redo it.
How the visit works
On the day, we look over the joints with you first, so you know exactly what we are doing. We protect the surfaces around the joints before any work starts. Most jobs take anything from a few hours to several days, depending on the building. In Toy's Hill, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents 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.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Let us know about earlier repairs to the joints
- Keep pets and children clear of the area while we work
- Mention any parking rules near the property
Get a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand.