Kent · England

Sand mastic for sash & case windows in Ashford, Kent

Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Ashford. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.

  • Open joints round the window box
  • Draughts and rain around sash boxes
  • A silicone bead on a sash window that spoils the look

Sand mastic for Ashford homes and businesses

Sand mastic in Ashford

Silicone on a period window often looks wrong and does not suit the building. Sand mastic is the traditional choice and we can swap the silicone for it. If you have crumbling sand mastic round a window and gaps between timber frames and stone or brick, we can help, whatever the surface.

With a large rental market, Ashford has plenty of windows that landlords need to keep weathertight. Gaps around a frame let in draughts and water, and tenants notice.

The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.

Place
Ashford (TN23, TN24, TN25, TN26)
Wider area
Kent
Guarantee
A year, on every job
Quotes
A clear quote up front
Call
0345 464 0079
Page updated
26 October 2026
Applicator reaching up to seal an external door frame on a sunny day

For landlords and businesses

A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.

Landlords and letting agents in Ashford can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.

Why act early in Ashford

A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and blends with the stone or brick. For landlords in Ashford, failed sealant soon turns into tenant complaints about mould, damp or draughts. Sorting it between tenancies is easier than dealing with it mid-let.

The cost reflects the work involved, not guesswork. That’s why we ask a few questions first.

Why choose Mr Mastic in Ashford

  • ARBOMaster approved applicator
  • Homes, businesses and hotels
  • Fully insured
  • Neat joints and a tidy finish

Take a look at what affects the cost or what customers say.

What the job involves on each surface

Sash and case windows

A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.

Timber door frames

A neat sand mastic joint round a front door suits a period home.

Ashford questions

Is there a guarantee on sand mastic in Ashford?

Every job comes with our 12-month guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.

I let a flat near Ashford International station. Can you help?

Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.

Is there any odour?

Sometimes, a little. Any smell clears as the sealant cures.

Do you come to Ashford?

Yes, we do. Ashford is part of the area we cover, and the service is the same as everywhere else.

Do I need permission for sand mastic on a listed building?

Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like but the decision is theirs.

Should I try DIY first?

That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.

Can you work on commercial sites?

Yes. We have worked for hotels, offices and other businesses, and we are fully insured.

What exactly is sand mastic?

It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and shaped to suit the surround.

What we do, step by step

At the end, we look at the finished work together and explain the cure time. The visit itself generally takes anything from a few hours to a full day, depending on how many windows, depending on the amount of work. Jobs in a place the size of Ashford range from town-centre flats to offices and family homes. For each, it helps to know about access, parking and where the joints are.

  1. First we agree which joints need doing.
  2. Old mastic and any loose material are raked out.
  3. We pack any deep voids first.
  4. We apply the mastic by hand and shape it.
  5. We dress the finish so it sits neatly against the masonry.

Before we arrive

  • Mention any sign-in or site rules at work premises
  • Clear items away from the joints we are working on
  • Let us know if you’ve seen damp or leaks

Get a quote

Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we will take it from there.

Ask for a quote

Related advice

What sealant work cannot fix

Sealant isn’t the answer to every problem, and we will tell you before any work starts. It will not solve:

  • Crumbling stone or brickwork round the window
  • Whether work needs listed building consent
  • Cracked or broken glass

If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think before booking.

Joints and surfaces we work on

  • Period & listed homes
  • Stone surrounds
  • Timber door frames
  • Brick reveals
  • Sash and case windows
  • Tenement windows

Should I try it myself first?

The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.

Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.

Sand mastic in Ashford: local notes

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. With historic houses such as Godinton House (about 2 miles north-west) nearby, there’s older building stock in the area around Ashford as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.

Managing a site like Chilmington Green Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. If you live in an older home near Christ Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Letting a property close to Ashford International station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.

Ashford is in Kent. If you need sand mastic in Ashford, it’s easy to get a quote: please call 0345 464 0079 or email us. We’re based in Crawley and cover Kent, Ashford included. Across Kent, we cover 922 places, Ashford among them. You can also see our page for Chelmsford, about 44 miles away.

Every address in TN23, TN24, TN25 and TN26 is covered for sand mastic, from the main roads to the quietest streets. We cover properties on Market Lane, Church Road and Station Road. Main roads around Ashford include the A20 and A28, which makes travel easy. Close by, we work in Stanhope (1 mile south-west), Newtown (1 mile south-east), South Willesborough (1 mile south-east), Godinton (1 mile north-west) and Willesborough (1 mile east). Further out, we also cover Canterbury (13 miles north-east), Sittingbourne (15 miles north), Folkestone (14 miles east), Faversham (12 miles north), Hythe (10 miles south-east) and Davington (12 miles north). As one of the bigger places in Kent, Ashford has homes, rented property and businesses of every kind.

Near you in Ashford

In Ashford, that means homes and buildings near The Locomotive pub, Ashford Green Corridors and Ashford School, among other places. Ashford has its own railway station: Ashford International station. A little further out are William Harvey Hospital (2.1 miles east) and Ashford Designer Outlet (0.6 miles south-east). The countryside around Ashford includes Hatch Park.

Map of Ashford © OpenStreetMap contributors

What affects the cost of sand mastic

For a quick quote, just ask. What matters most is:

  • How many rooms, windows or areas are involved
  • How easy the joints are to reach
  • The old material and how stubborn it is
  • How much there is to do

What it costs depends on the amount of work, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.

What we need to know

When you contact us, these details help:

  • The address or postcode of the job
  • Any access issues, like height or stairs
  • The problem you’ve noticed
  • Whether it’s a home or a business

Want a quote for sand mastic? Please ring 0345 464 0079 or email us with a few details. We’ll explain what we’d do and give you a clear quote before any work starts.

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job