Greater London · England
Biggin Hill Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Biggin Hill, with a 12-month guarantee on every job. Call for a quick quote.
- Cracked mastic round a front door frame
- Old sand mastic that has cracked, crumbled or fallen out
- Tired mastic found when preparing windows for paint
How the visit works
When we arrive, we look over the joints with you first, so you know exactly what we’re doing. Surfaces next to the work are protected before work begins. The work normally takes anything from a few hours to a full day, depending on how many windows. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Biggin Hill. A visitor permit or a nearby bay makes the visit run more smoothly.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
How to prepare
- Clear items away from the joints we are working on
- For business premises, tell us about site rules or sign-in
- Mention any leaks or damp you’ve noticed
Get a quote
If you’re in Biggin Hill and need sand mastic, call 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.
Related advice
Sand mastic in Biggin Hill, done properly
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. We are often asked to deal with cracked mastic round a front door frame and wind and rain getting in round a sash window, on stone surrounds, period & listed homes and tenement windows.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease normally says who is responsible for the windows, so it’s worth checking before booking.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Where
- Biggin Hill (TN16, BR6)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What sand mastic looks like in Biggin Hill
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. Historic houses like Down House (about 1.7 miles north-east) are a reminder that the area around Biggin Hill has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
As a London address, Biggin Hill can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. For site and facilities teams at buildings such as Oaklands Primary Academy, the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Woldingham station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Biggin Hill is about 6 miles east of Caterham, in Greater London. Whether you’re in the middle of Biggin Hill or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 764 towns and villages across Greater London, from the larger towns to small villages. London is on our list too, about 14 miles from Biggin Hill.
Every address in TN16 and BR6 is covered for sand mastic, from the main roads to the quietest streets. If you need sand mastic at a property on Rushdene Walk, Mount Pleasant and Stock Hill or a nearby road, our applicators can take on the job. Biggin Hill is on the A233, which makes it straightforward to reach. Other places close to Biggin Hill include Aperfield (1 mile south-east), Luxted (1 mile north-east), Berry's Green (1 mile east), Single Street (1 mile east) and Leaves Green (2 miles north). Further out, we also cover London (14 miles north-west), Whitechapel (15 miles north), Brompton (15 miles north-west), Stockwell (13 miles north-west), Orpington (6 miles north-east) and Wimbledon (13 miles north-west).
Landmarks near Biggin Hill
In Biggin Hill, that means homes and buildings near Charles Darwin School, among other places. Biggin Hill’s nearest station is Woldingham station, about 3.8 miles south-west of the centre. Well-known places in the area include Warlingham Park Hospital (2.7 miles west). Green spaces nearby include Betsom's Hill and West Kent Golf Course nature reserve.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. Several properties can be quoted together.
For anyone letting property in or around Biggin Hill, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and pictures by email help.
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Why act early in Biggin Hill
Replacing sash windows is a big decision for a period home and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we’ll explain what it covers.
Why Biggin Hill clients choose us
- Rated 4.9 stars on Google
- We never seal over old sealant
- Homes, businesses and hotels
- ARBOMaster approved applicator
Read our cost guide or our reviews.
How we quote for sand mastic
Call for a quick quote. What matters most is:
- How easy the joints are to reach
- The product the joint needs
- The amount of work
- Any working-time requirements on site
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
When you call or email, these details help:
- Whether it’s a home or a business
- A few photos by email, if you can
- Where the property is
- How many joints, rooms or windows are involved
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, call 0345 464 0079 or drop us an email.
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Keep sills and gutters clear so water drains away
- Look over the window mastic once a year
- Go gently near the mastic when preparing windows
- Have rotten timber repaired before new mastic goes in
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
Your questions about sand mastic in Biggin Hill
Can parking be tricky for a visit in Biggin Hill?
Parking in Biggin Hill, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Can you help a landlord with a rental near Woldingham station?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Do you work in Biggin Hill?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland, and that includes Biggin Hill.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done.
How long does the job take?
Typically it takes a few hours for a single window, longer for several. Larger jobs naturally take longer, and we will tell you how long to expect.
Should I use sand mastic or silicone?
For period timber windows in stone or brick, sand mastic is often the better fit. Modern frames normally suit a flexible sealant.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new sealant bonds properly.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
Also near Biggin Hill
Also in Biggin Hill
Surface by surface
Period and listed homes
Materials matter on listed and conservation-area homes. Sand mastic is often the preferred finish.
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.