Kent · England
Farthing Green Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Farthing Green and across Kent. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Window mastic to renew ahead of painting
- A silicone bead on a sash window that spoils the look
- Open joints round the window box
Sand mastic in Farthing Green
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It suits period and listed homes, where modern sealant can look out of place. We work on period & listed homes, timber door frames and stone surrounds, and the jobs we see most are silicone on a period window that looks wrong and old cement repairs round a window that have failed.
Around Farthing Green, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
You get a 12-month guarantee, the same in Farthing Green as everywhere else we work.
- Where
- Farthing Green (TN12)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Common questions in Farthing Green
Do you cover Farthing Green for sand mastic?
Yes, Farthing Green is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
Do you work for landlords with property near Staplehurst station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Can sand mastic be painted?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Are you insured?
Yes. We are fully insured, and we can confirm the details when we quote.
Is consent needed for window work on a listed home?
Check with your local planning authority. They’ll tell you if consent is needed for work to your windows.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages.
Is it OK to seal over old sealant?
No, it won’t last. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
What happens if it’s left?
New mastic over crumbling mastic will not hold. We remove the loose material first so the new work lasts. Older cottages and farmhouses around Farthing Green can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Leaving a failed joint normally makes the job bigger, not smaller. If you are not sure whether it needs doing, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why Farthing Green customers choose us
- Approved under the ARBOMaster scheme
- Anti-fungal silicone where joints get wet
- Every job guaranteed for a year
- Quality sealants from Arbo and Everbuild
Read our cost guide or what customers say.
Frames and glazing around Farthing Green
With historic houses such as Stoneacre (about 4.4 miles north) nearby, there’s older building stock in the area around Farthing Green as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Historic houses such as Stoneacre, about 4.4 miles north, show how far back building around Farthing Green goes, and older homes nearby need a sealant that suits their walls. Rented homes near Staplehurst station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Farthing Green is about 6 miles south-east of Maidstone, in Kent. Anywhere in TN12, we cover sand mastic for homes and businesses. We cover 922 towns and villages across Kent, large and small. Our Crawley page covers work nearby.
We cover every part of TN12 for sand mastic and the streets around it. We also cover Devil's Den (1 mile north-west), Hawkenbury (1 mile south-west), Rabbit's Cross (2 miles west), Cross-at-Hand (2 miles west) and Staplehurst (2 miles south-west). Further out, we also cover Maidstone (6 miles north-west), Ashford (12 miles east), Sittingbourne (12 miles north-east), Royal Tunbridge Wells (14 miles west), Tonbridge (14 miles west) and Faversham (15 miles north-east).
Around Farthing Green
Farthing Green’s nearest station is Staplehurst station, about 2.1 miles south-west of the centre. Well-known places in the area include Brattle Farm Museum (3.4 miles south-west) and Sutton Valence Castle (1.6 miles north).
Also near Farthing Green
What else we do in Farthing Green
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Decayed frames that need repair
- Whether work needs listed building consent
- Crumbling stone or brickwork round the window
If you are not sure, just call 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Timber door frames
- Tenement windows
- Period & listed homes
- Brick reveals
- Stone surrounds
- Sash and case windows
How it works
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours per window, depending on the condition of the joints. Somewhere like Farthing Green needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
- Clear items away from the joints we’re working on
Get a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
Related advice
Aftercare tips
A little care helps the new joints last. We recommend:
- Renew mastic before redecorating the windows
- Have rotten timber repaired before new mastic goes in
- Check the mastic when you check the paintwork
- Clear gutters so water doesn’t pour onto the windows
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
Landlord and commercial work in Farthing Green
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
Landlords and letting agents in Farthing Green can book us as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
What the job involves on each surface
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
Sash and case windows
Sash windows are where we do most sand mastic work. We renew the mastic round each box.