Kent · England
Sand mastic for sash & case windows in Newnham, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Newnham, with a one-year guarantee on every job. Ask us for a quote.
- Draughty sash windows at the surround
- Window mastic to renew ahead of painting
- Old cement repairs round a window that have failed
How it works
We bring everything the job needs with us, so you do not need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours per window, depending on the condition of the joints. Somewhere like Newnham 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.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Mention any sign-in or site rules at work premises
- Move anything stored near the joints
- Tell us about any previous sealing or DIY attempts
How to get a quote
We do not publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.
Advice
Sand mastic in Newnham, done properly
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditional guidance is not to paint over it and we’ll advise if you are redecorating. If you’re dealing with mastic worn away on windows facing the weather and cement or filler used on old window joints that has cracked, we can help.
Homes in small places like Newnham often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
We stand behind the work with a 12-month guarantee.
- Where
- Newnham (ME9)
- Region
- Kent
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How the job changes by surface
Stone surrounds
Stone openings are rarely perfectly straight, so the joint varies in width. Sand mastic is shaped by hand to suit.
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We work on single windows or whole elevations.
When it isn’t the sealant
New sealant can’t fix everything, and we’ll tell you before work begins. Sealant won’t put right:
- Timber that has rotted
- Crumbling stone or brickwork round the window
- Planning or listed building consent (your local planning authority decides)
If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Surfaces we seal
- Tenement windows
- Sash and case windows
- Stone surrounds
- Timber door frames
- Period & listed homes
- Brick reveals
Towns and villages near Newnham
What else we do in Newnham
Frames and glazing around Newnham
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Belmont House and Gardens (about 2.2 miles south-east) are a reminder that the area around Newnham 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’s traditional sand mastic.
If you live in an older home near Church of St Peter and St Paul, the joint between an old wall and a newer frame is usually the first place rain gets in. For landlords with property near Teynham station, older sash windows in a rental need their mastic kept sound to keep the weather out. If you look after a building such as Eastling Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Newnham is about 4 miles south-west of Faversham, in Kent. For sand mastic in and around Newnham, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We are based in Crawley and cover Kent. We cover 922 towns and villages across Kent, large and small. We also work in Chelmsford, about 34 miles from Newnham.
Work in ME9 works the same way as everywhere else we cover. Whether your property is on The Street, Sharsted Hill and Newnham Lane or anywhere close by, our applicators can take on the job. Nearby, we also carry out sand mastic in Doddington (1 mile west), Wichling (2 miles west), Bluetown (2 miles west), Hollybushes (3 miles west) and Payden Street (3 miles south-west). We also work in nearby towns such as Maidstone (12 miles west), Ashford (10 miles south), Canterbury (12 miles east), Sittingbourne (5 miles north-west), Whitstable (11 miles north-east) and Faversham (4 miles north-east).
Local landmarks in Newnham
In Newnham, that means homes and buildings near The George Inn and Doddington Place Gardens, among other places. For rail, the closest station is Teynham station, about 3.4 miles north of the centre. Other landmarks nearby include Newnham Castle (under half a mile north-east).
What affects the cost of sand mastic
Your quote is based on your job. We look at:
- When we can work, for business premises
- Access and height
- How much there is to do
- The product the joint needs
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Helping us quote
To make quoting easier, let us know:
- Roughly how big the job is
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- Whether it has been sealed before
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved and give you a clear quote.
Questions from Newnham
I let a flat near Teynham station. Can you help?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Do you cover Newnham for sand mastic?
Yes, Newnham is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job, and we’ll send you a clear quote.
Should I use sand mastic or silicone?
It depends on the window. Period windows in stone or brick generally suit sand mastic, while modern frames normally get a flexible sealant.
Can I paint the new mastic?
Traditional guidance is not to paint over sand mastic. If you are redecorating the window, ask us first and we will advise.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Can you replace silicone on a period window with sand mastic?
Yes. We remove the silicone and clean the joint before the sand mastic goes in.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
How do I get a quote for sand mastic in Newnham?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or send us an email with a short description of the job.
Leave it or put it right?
If you are redecorating, renew the mastic first. Painting over failed mastic doesn’t seal it and traditional guidance is to leave the new mastic unpainted. Where a wall is exposed, as many are in small places like Newnham, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Newnham clients choose us
- Trusted Arbo and Everbuild sealants
- ARBOMaster approved applicator
- We never seal over old sealant
- Homes, businesses and hotels
For landlords and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
DIY versus a professional finish
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.