Greater London · England
Locksbottom Sand Mastic
Window and door surrounds in Locksbottom need attention? We cut out the old, prepare the joints and apply the right sealant.
- Mastic worn away on windows facing the weather
- Silicone on a period window that looks wrong
- Draughty sash windows at the surround
FAQs for Locksbottom
Can you help a landlord with a rental near Orpington station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or email us with the details for a clear quote.
Do you cover Locksbottom for sand mastic?
Yes. We work across London and the South East, and Locksbottom is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Can I add another job to the visit?
Yes. Just list everything you need and we’ll quote it together.
Can I choose the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The product needed can limit the range.
Can old silicone round a sash window be swapped for sand mastic?
Generally, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
What exactly is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
How we handle sand mastic in Locksbottom
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It’s a good fit for period properties where a modern sealant bead would stand out. Typical jobs include open joints round the window box and silicone on a period window that looks wrong, on period & listed homes, stone surrounds and sash and case windows.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in.
All of our work is guaranteed for twelve months, in Locksbottom and everywhere else we cover.
- Where
- Locksbottom (BR6, BR2, BR5)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Do you need sand mastic in Locksbottom?
Over the years, sand mastic weathers. It hardens, cracks and starts to come away on the stone or timber.
The problems people usually mention when they call include:
- Draughty sash windows at the surround
- Gaps where the frame meets the masonry
- Mastic that needs renewing before redecorating
- Old sand mastic that has cracked, crumbled or fallen out
Managing a site like Darrick Wood Infant & Nursery School? Then the mastic around its windows and doors needs looking after like any other building’s.
Questions to ask before you book
- What product goes in the joint
- How the colour is chosen
- Who turns up on the day
- How the joint is cleaned and prepared
Landlord and commercial work in Locksbottom
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Letting agents and landlords in Locksbottom can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
How it works
The work is kept neat and contained to the area we are working on. Expect the work to take a few hours for a single window, longer for several, and we explain the cure time before we leave. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Locksbottom. A visitor permit or a nearby bay makes the visit run more smoothly.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Tell us about any previous sealing or DIY attempts
- Mention any tricky access
Get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
Read more
Different surfaces, different methods
Sash and case windows
On a sash window, the mastic joint shows on the outside, so a neat, even finish matters.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
How we quote for sand mastic
We quote each job individually. This is what makes a difference:
- When we can work, for business premises
- Mould in or behind the old joints
- The old material and how stubborn it is
- How much there is to do
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Photos by email, if that’s easy
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
- Any previous sealing or DIY work
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Towns and villages near Locksbottom
Also in Locksbottom
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Timber that has rotted
- Masonry that needs repairing
- Broken panes
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before booking.
What we seal
- Timber door frames
- Period & listed homes
- Brick reveals
- Stone surrounds
- Tenement windows
- Sash and case windows
Windows and doors in Locksbottom
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Down House (about 2.7 miles south) are a reminder that the area around Locksbottom has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
As a London address, Locksbottom can be tricky for parking: let us know about parking bays, permits or a driveway. If you let a flat or house near Orpington station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Locksbottom is about 2 miles south-west of Orpington, in Greater London. From the centre of Locksbottom to the outskirts, sand mastic is available for homes and businesses alike. 764 places in Greater London are on our list, large and small. There’s also a page for London, roughly 11 miles from Locksbottom.
Postcode districts we cover here for sand mastic: BR6, BR2 and BR5. We cover properties on Mada Road, Winton Road and Park Avenue and the roads around them. If you’re just outside Locksbottom, we cover Crofton (1 mile east), Farnborough (1 mile south-east), Petts Wood (1 mile north-east), Bromley Common (1 mile north-west) and Keston (1 mile south-west). We also work in nearby towns such as London (11 miles north-west), City of Westminster (14 miles north-west), Marylebone (14 miles north-west), Kensington (14 miles north-west), St Pancras (13 miles north-west) and Shoreditch (12 miles north-west).
Around Locksbottom
We work in homes and buildings around South Park and Darrick Wood School, among other places. The nearest railway station is Orpington station, roughly 1.2 miles east. Well-known places in the area include Princess Royal University Hospital (0.5 miles south-west) and Crofton Roman Villa (1.2 miles east). The countryside around Locksbottom includes Summer Hill and Downe Bank Nature Reserve.
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.