Greater London · England
External & façade joints in Bickley, Greater London
Sealing brickwork movement joints, render, cladding and façade joints for Bickley, backed by a one-year guarantee. Ask us for a quote.
- Damp patches traced to an open external joint
- Failed sealant between panels on a façade
- Sealant that has lost its bond to the brick or render
External mastic in Bickley, done properly
A movement joint is a deliberate break that lets a wall expand and contract. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. If you have joints pointed up with cement by mistake and brick movement joints where the sealant has split, we can help.
Modern London flats rely on sealed movement joints and cladding joints. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall, and both kinds of building are found across London.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Bickley (BR1, BR2, BR7)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
After the cure time, these simple habits help:
- Keep water from gutters off the wall
- Keep high-pressure jets off the joints
- Point out the joints to other trades
- Do not let climbing plants root in the sealant
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges over time.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Quotes for external mastic in Bickley
Every job gets its own quote. This is what makes a difference:
- Any mould that needs treating
- How much there is to do
- The old material and how stubborn it is
- How many areas need sealing
The cost depends on how much there is to do, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Asking for a quote
When you call or email, it’s useful to know:
- Any access issues, like height or stairs
- Whether it has been sealed before
- What’s wrong with the joints now
- If it’s domestic, commercial or a hotel
Need a quote? Please phone 0345 464 0079 or email us with a few details. We will explain what we’d do and give you a clear quote before any work starts.
What we do, step by step
On the day, we look over the joints with you first. Surfaces next to the work are protected before any work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. For a job in Bickley, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
- On commercial sites, let us know about site rules
Ask for a quote
If you’re in Bickley and need external mastic, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
Honest limits
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- Walls that need new movement joints cut into them
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Movement that is more than a sealant joint can take
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer.
Surfaces we seal
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
- Concrete & block
- Render & cladding joints
- Façade panels
What happens if it’s left?
Sealing over the top of old mastic does not hold for long. The new layer cannot bond properly to old, weathered material, so we always take the old sealant out. 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. Dealing with it early is far simpler for homes in Bickley.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why book with us
- A 12-month guarantee on all work
- Sanitary silicone with an anti-fungal additive in wet areas
- Rated 4.9 stars on Google
- Old sealant always removed completely
Take a look at our cost guide or customer reviews.
Work for landlords, hotels and businesses
Landlords and letting agents in Bickley can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
More services for Bickley
Outside joints around Bickley
With historic houses such as Bromley Palace (about 1.1 miles west) nearby, there’s older building stock in the area around Bickley 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. In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking.
Letting a property close to Bickley station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. In the older streets around Church of St George, the joints between older walls, newer extensions and the roofline need a sealant that can move. Bickley is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Bickley is about 1 mile east of Bromley, in Greater London. Wherever you are in the BR1 postcode area, we cover external mastic for homes and businesses. Our area takes in 764 places across Greater London, from the larger towns to small villages. There’s also a page for London, roughly 9 miles from Bickley.
Jobs for external mastic in BR1, BR2 and BR7 works the same way as everywhere else we cover. External mastic is available to properties on Golf Road, The Avenue and Canon Road. If you are just outside Bickley, we cover Widmore (1 mile north), Elmstead (1 mile north), Chislehurst (1 mile north-east), Bromley (1 mile west) and Sundridge (1 mile north-west). We also work in nearby towns such as London (9 miles north-west), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (13 miles north-west), St Pancras (11 miles north-west) and Shoreditch (10 miles north-west).
Near you in Bickley
Typical jobs here are in homes near Bird In Hand Public House, Holy Trinity College Bromley and Jubilee Country Park, among other places. There’s a railway station in Bickley itself: Bickley station. Other landmarks nearby include Bethlem Museum of the Mind (1.5 miles south-west) and The Mall (1.3 miles west). Open spaces near Bickley include Summer Hill and The Tarn.
Common questions in Bickley
Is parking a problem for a job in Bickley?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Can you do external mastic in Bickley?
Yes, Bickley is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Will there be a smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Can you seal joints between render and window frames?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces with primer where required.
Can I add another job to the visit?
Yes. Just list everything you need.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Is it messy?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
How do you reach high-level joints?
It depends on the building. Tell us the height, the number of joints and what’s below them and we will confirm how they can be reached safely.