Greater London · England
Sand mastic for sash & case windows in Farnborough, Greater London
Professional sand mastic in and around Farnborough, with old sealant always removed completely.
- Cracked mastic round a front door frame
- Mastic dropping out of the joint
- Mastic that needs renewing before redecorating
Sand mastic for homes and businesses in Farnborough
Sand mastic skins over fairly quickly but full hardening takes longer. Traditionally, sand mastic is left unpainted, so ask us before you decorate. We work on period & listed homes, timber door frames and tenement windows, and the jobs we see most are window mastic to renew ahead of painting and weathered mastic on the most exposed windows.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Farnborough as anywhere.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Location
- Farnborough (BR6)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
When something else is needed
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Whether work needs listed building consent
- Masonry that needs repairing
- Sashes that need overhauling
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think before you book.
Where we work in Farnborough
- Timber door frames
- Sash and case windows
- Brick reveals
- Period & listed homes
- Tenement windows
- Stone surrounds
Also near Farnborough
What else we do in Farnborough
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Leave the new mastic unpainted
- Find out about consent before window work on a listed home
- Sort the mastic before the decorators arrive
- Go gently near the mastic when preparing windows
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
Questions from Farnborough
Is parking a problem for a job in Farnborough?
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.
Is Farnborough in your area for sand mastic?
Yes, Farnborough is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or email us and tell us what needs doing.
What exactly is sand mastic?
It’s sand mixed with a linseed-oil-based binder, used between timber frames and stone or brick.
How much does sand mastic cost in Farnborough?
It depends on the job, so we quote each one individually. To get one, phone 0345 464 0079 or send us an email with a short description of the job.
Are you insured?
Yes. We are fully insured for domestic and commercial work.
Do you work for letting agents?
Yes, we do. Domestic, commercial and hotel work are all part of what we do, and we are fully insured.
Do I need permission for sand mastic on a listed building?
Your local planning authority is the one to ask. They decide whether consent is needed for work to your windows.
Which is right for my windows, sand mastic or modern sealant?
It depends on the window. On many period windows, sand mastic looks right and suits the building and newer frames normally get a flexible sealant.
Why deal with it now?
If you are redecorating, renew the mastic first. Paint over cracked mastic will not stop the gaps and traditional guidance is to leave the new mastic unpainted. In a flat in Farnborough, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- Trusted Arbo and Everbuild sealants
- We leave the area clean and tidy
- Anti-fungal sanitary silicone in wet areas
- Any old sealant cut out fully, not covered over
Read our cost guide and customer reviews.
Frames and glazing around Farnborough
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. With historic houses such as Down House (about 2.1 miles south-west) nearby, there’s older building stock in the area around Farnborough as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
In the older streets around Church of St Giles the Abbot, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. As a London address, Farnborough can be tricky for parking: let us know about parking bays, permits or a driveway.
Farnborough is about 2 miles south-west of Orpington, in Greater London. Wherever you are in the BR6 postcode area, we can carry out sand mastic at your property. Farnborough is one of 764 towns and villages in Greater London we cover for sand mastic. London is on our list too, around 12 miles away.
Work in BR6 works the same way as everywhere else we cover. If you need sand mastic at a property on Tye Lane, Peel Road and Pitt Road or anywhere close by, we can help. Neighbouring places we cover for sand mastic include Green Street Green (1 mile south-east), Locksbottom (1 mile north-west), Crofton (1 mile north), Farthing Street (1 mile south-west) and Downe (2 miles south-west). Larger places within reach include London (12 miles north-west), City of Westminster (15 miles north-west), Marylebone (15 miles north-west), Kensington (15 miles north-west), St Pancras (14 miles north-west) and Shoreditch (13 miles north-west).
Around Farnborough
We work in homes and buildings around Newstead Wood School, South Park and The Buff pub. The closest station to Farnborough is Orpington station, roughly 1.2 miles north-east. Well-known places in the area include Orpington Hospital (0.9 miles east) and Crofton Roman Villa (1.1 miles north-east). For a walk, there’s Downe Bank Nature Reserve and Summer Hill.
The process
The work is kept neat and contained to the area we’re working on, so you can get on with your day. Expect the work to take anything from a few hours to a full day, depending on how many windows, and we explain the cure time before we leave. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know if you’ve seen damp or leaks
- Keep pets and children clear of the area while we work
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will talk you through the work before giving you a price.
Related advice
Signs you need sand mastic in Farnborough
Timber swells and shrinks with the weather. The movement cracks the mastic little by little.
The problems people generally mention when they call include:
- A silicone bead on a sash window that spoils the look
- Gaps where the frame meets the masonry
- Cement or filler used on old window joints that has cracked
- Cracked mastic round a front door frame
Schools such as Farnborough Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Questions to ask before booking
- What insurance they hold
- Is the old sealant removed completely?
- How the colour is chosen
- Who turns up on the day
Quotes for sand mastic in Farnborough
The quote reflects the job in front of us. We look at:
- How much there is to do
- How many rooms, windows or areas are involved
- Mould in or behind the old joints
- The old material and how stubborn it is
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Where the job is, and your postcode
- The type of property
- The problem you’ve noticed
- Photos by email, if that is easy
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Letting agents and landlords in Farnborough can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.