South East England and London

Sand Mastic in Medway

Wherever you are in Medway, we can help with sand mastic. A clear quote before we start, and a one-year guarantee.

Book sand mastic in Medway

Towns we cover in Medway

Traditional burnt sand mastic around sash and case windows and doors in stone and brick. Choose your town from the list to see local details, and call or email us for a quick quote.

Main towns

How sand mastic works in Medway

On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. We’re often asked to deal with mastic dropping out of the joint and gaps where the frame meets the masonry, on sash and case windows, timber door frames and period & listed homes.

When we arrive, we look over the joints with you first, so you know exactly what we’re doing. We protect the surfaces around the joints before any work begins. The work generally takes anything from a few hours to a full day, depending on how many windows.

Each surround is checked first.
The joint is raked out and cleaned.
We fill deep gaps so the new mastic isn’t too thick.
New sand mastic is applied and shaped by hand.
The finish is dressed neatly.

What you’ll pay

We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please call 0345 464 0079 or drop us an email.

Why choose Mr Mastic

Experience in homes, commercial sites and hotels
Over 20 years’ experience
Tidy, careful work
We are fully insured

Get a quote

We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or drop us an email and describe the job, and pictures are welcome.

Local landmarks in Gillingham

Locally, jobs take us to homes and businesses close to The Robert Napier School, Featherby Junior School and The Robert Napier School and the streets around them. You’ll also find Holy Trinity Church (under half a mile north-east), The Star pub (0.6 miles west) and Ambley Wood (0.8 miles south). Gillingham’s nearest station is Gillingham (Kent) station, roughly 1.5 miles north-west of the centre. Other landmarks nearby include Medway Maritime Hospital (1.6 miles west) and Six Poor Travellers House (3.3 miles west). Open spaces near Gillingham include Blue Bell Hill and Bishop Saltings.

Sand mastic across Medway: local notes

Homes across Medway range from period properties with timber or sash windows to new builds with uPVC. Walls facing the weather take the most punishment.

Most of the South East has hard water, so limescale builds up on sealant, grout and fittings. Whatever the job in Medway, surfaces are cleaned back properly before new sealant goes in. Medway includes coastal places, where outside joints face more wind, rain and salt than they would inland. Joints on seaward walls tend to fail first.

Gillingham: In the older streets around Holy Trinity 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 Gillingham (Kent) station? Then any sash windows need sound mastic to keep draughts and rain out.

Different surfaces, different methods

Tenement and terrace windows

Rows of sash windows on tenements and terraces often need renewing together. We work on single windows or whole elevations.

Sash and case windows

The mastic round a sash window is on show, so a neat, even finish matters.

What affects the cost of sand mastic

We quote each job individually. This is what makes a difference:

The product the joint needs
Any working-time requirements on site
Mould in or behind the old joints
Whether old sealant or filler has to be cut out

The cost reflects the work involved, not guesswork. That’s why we ask about the job first.

Asking for a quote

A few details help us give you an accurate quote. When you get in contact, it helps to mention:

Any access issues, like height or stairs
Roughly how big the job is
If someone has resealed it before
The type of property

The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.

Work for landlords, hotels and businesses

Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.

Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.

Why it fails

Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.

Any of these means the joints need attention:

Gaps between timber frames and stone or brick
Old sand mastic that has cracked, crumbled or fallen out
Draughty sash windows at the surround
Window mastic to renew ahead of painting

When it isn’t the sealant

To be straight with you, some problems need a different trade:

Sashes that rattle, stick or won’t open
Rotten sashes, sills or window boxes (a joiner’s job)
Broken panes

Questions from Medway

Do you do commercial work?

Yes, regularly. We can plan bigger jobs in stages to suit the site.

Can tenants book the work?

Of course. Check with your landlord; we can send the quote to them too.

Should I use sand mastic or silicone?

For period timber windows in stone or brick, sand mastic is often the better fit. On modern frames, we’d normally use a flexible sealant, and we’ll explain why.

Is it worth trying it myself?

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

Can you match the sealant colour?

Yes. Sealants come in white, clear, grey and other colours for many products, and we agree the colour with you before any work starts.

Are you fully insured?

Yes. Full insurance covers our work.

Do you come to Medway?

Yes. From our base in Crawley, we cover South East England, London and all of Scotland.

20+ yearsMastic and sealant specialists

ARBOMaster approvedApproved applicator for Arbo sealants

Fully insuredDomestic, commercial and hotels

One-year guaranteeOn every job

4.9 on Google180+ five-star reviews