Kent · England
Swift's Green Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Swift's Green, backed by a 12-month guarantee. Call for a quick quote.
- A silicone bead on a sash window that spoils the look
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps where the frame meets the masonry
Windows and doors in Swift's Green
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Headcorn station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Around Swift's Green, as everywhere, sand mastic is only as good as the preparation behind it.
Swift's Green is about 9 miles west of Ashford, in Kent. For sand mastic in and around Swift's Green, please ring 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover Kent, Swift's Green included. We cover 922 towns and villages across Kent. You can also see our page for Crawley, about 38 miles away.
All of TN27 is covered for sand mastic. If you are just outside Swift's Green, we cover Smarden Bell (1 mile south), Southernden (1 mile north), Smarden (1 mile south-east), Biddenden Green (1 mile south-east) and Monk's Hill (2 miles south). Further out, we also cover Maidstone (9 miles north-west), Ashford (9 miles east), Sittingbourne (12 miles north), Faversham (14 miles north-east), Kings Hill (14 miles north-west) and Davington (14 miles north-east).
Around Swift's Green
Locally, jobs take us to homes and businesses close to The Bell Inn and the streets around them. The closest station to Swift's Green is Headcorn station, roughly 2.1 miles west. A little further out are Kent Firefighting Museum (3.3 miles south-west) and Romden Castle (2.1 miles south-east).
Sand mastic for homes and businesses in Swift's Green
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. We’re often asked to deal with wind and rain getting in round a sash window and mastic worn away on windows facing the weather, on tenement windows, period & listed homes and stone surrounds.
Outdoor sealant needs dry, clean surfaces, so work on frames around Swift's Green is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Swift's Green (TN27)
- Region
- Kent
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Why deal with it now?
Filling over old, loose mastic does not last. Raking out and preparing the joint gives it a sound base so the new work lasts. Around Swift's Green, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Ask us for a quote and we’ll explain what it covers.
Why us?
- Sanitary silicone with an anti-fungal additive in wet areas
- Trusted Arbo and Everbuild sealants
- Rated 4.9 stars on Google
- 12-month guarantee on every job
DIY versus a professional finish
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
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.
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
How the job changes by surface
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
Brick reveals
An open joint at a brick reveal lets weather in. Renewing the mastic closes it.
How the visit works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours for a single window, longer for several, and the area is left clean. Somewhere as small as Swift's Green, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- Mention if the joints have been sealed before
- Let us know about stairs, lifts or work at height
- Keep pets and children clear of the area while we work
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Read more
Aftercare tips
Good habits help new joints last longer. Our tips:
- Clear gutters so water does not pour onto the windows
- Leave the new mastic unpainted
- Ask the planning authority about consent for listed or conservation-area homes
- Avoid patching sand mastic with silicone
Avoid painting over the new mastic, which is the traditional advice. Ask us before any decorating around it.
An open joint round the box lets weather through. Left, the gap tends to get bigger as more mastic falls out.
Towns and villages near Swift's Green
More services for Swift's Green
What affects the quote in Swift's Green
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The size of the job
- Access and height
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What to tell us for a quote
When you contact us, it’s useful to know:
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
- Whether it has been sealed before
- Where the property is
Getting a quote is simple: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand.
FAQs for Swift's Green
Do you cover Swift's Green for sand mastic?
Yes, Swift's Green is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing, and we will send you a clear quote.
Do you work for landlords with property near Headcorn station?
Yes. We work for landlords and agents as well as householders. Just call 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear price.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Can I choose the sealant colour?
We’ll suggest a colour to suit the surroundings, from white and clear to greys and other shades. The choice depends on the product the joint needs.
Are you insured?
Yes. Mr Mastic is fully insured.
What does sand mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we will talk you through it.
Can new sealant go over the old?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.