Medway · England
Sand mastic for sash & case windows in Chatham Waterfront, Medway
We cover Chatham Waterfront for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly.
- Old cement repairs round a window that have failed
- Old sand mastic that has cracked, crumbled or fallen out
- Weathered mastic on the most exposed windows
Sand mastic for homes and businesses in Chatham Waterfront
Our applicators renew the sand mastic around sash and case windows and doors in stone and brick. The old mastic is raked out, the joint is prepared and new mastic is shaped by hand. We work on sash and case windows, brick reveals and stone surrounds, and people most often call us about draughty sash windows at the surround and mastic that needs renewing before redecorating.
Homes around Chatham Waterfront range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- Chatham Waterfront (ME4, ME1, ME7)
- Region
- Medway
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
When to call us in Chatham Waterfront
Age is the main cause. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
If you can see any of these, it’s time to have the joints looked at:
- Wind and rain getting in round a sash window
- Modern sealant on a period surround
- Cement or filler used on old window joints that has cracked
- Gaps round a timber door in stone or brick
If you look after a building such as Brompton-Westbrook Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- Which sealant they’ll use, and why
- How the surfaces are prepared before sealing
- What happens if they find a problem under the old sealant
- Whether you can choose the colour
Also near Chatham Waterfront
Also in Chatham Waterfront
What sand mastic looks like in Chatham Waterfront
Chatham Waterfront is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around older windows and doors, especially on the side facing the sea. Historic houses like Restoration House (about 0.8 miles west) are a reminder that the area around Chatham Waterfront has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For landlords with property near Chatham station, older sash windows in a rental need their mastic kept sound to keep the weather out. In the older streets around Church of St John the Divine, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Chatham Waterfront is about 1 mile east of Rochester, in Medway. From the centre of Chatham Waterfront to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Chatham Waterfront is one of 68 places in Medway where we work. There’s also a page for Chelmsford, about 24 miles away.
Our applicators cover all of the ME4, ME1 and ME7 postcode area for sand mastic and the streets around it. Sand mastic is available to properties on New Road, Old Road and Ship Lane and the roads around them. Main roads around Chatham Waterfront include the A231, which makes travel easy. If you are just outside Chatham Waterfront, we cover Brompton (1 mile north-east), Rochester Riverside (1 mile north-west), Luton (1 mile south-east), Frindsbury (1 mile north-west) and Chatham (2 miles south). Within a short drive, we also cover Rainham (4 miles south-east), Park Wood (4 miles south-east), Lordswood (3 miles south), Twydall (3 miles east), Hoo St Werburgh (3 miles north-east) and Wigmore (4 miles south-east).
Local landmarks in Chatham Waterfront
Typical jobs here are in homes near King's Arms, St John Fisher RC Comprehensive School and Former Ordnance Store At Chatham Gun Wharf. Also close by are St Michael the Archangel Church (within half a mile south), Fort Pitt Grammar School (0.5 miles south-west) and The Paddock (within half a mile north-east). There’s a railway station in Chatham Waterfront itself: Chatham station. A little further out are St. Bartholomew's Hospital (under half a mile west) and Rochester Castle (1 mile west). Green spaces nearby include Gad's Hill and Ranscombe Farm.
How it works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes a few hours per window, depending on the condition of the joints from start to finish. In a smaller place like Chatham Waterfront, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Tell us if parking is tricky
- Mention if the joints have been sealed before
- Mention any tricky access
Getting a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work and send you a clear quote.
Read more
What the job involves on each surface
Timber door frames
Doors face weather and wear and the mastic can crack early. We rake it out and renew it.
Period and listed homes
Materials matter on listed and conservation-area homes. Sand mastic is often the preferred finish.
What we cannot put right
A few problems are outside what sealant work can do:
- Broken panes
- Sash cords, weights and draught-proofing of the sashes
- Planning or listed building consent (your local planning authority decides)
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before you book.
Where we work in Chatham Waterfront
- Tenement windows
- Period & listed homes
- Sash and case windows
- Brick reveals
- Stone surrounds
- Timber door frames
Questions from Chatham Waterfront
I let a flat near Chatham station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Is sand mastic in a coastal place like Chatham Waterfront any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Will it make a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Which is right for my windows, sand mastic or modern sealant?
We will talk it through with you. Period homes often look best with sand mastic, and modern sealants suit newer frames.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
Where are you based?
Our base is Crawley. Our area covers South East England, London and Scotland.
What is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Don’t run silicone over sand mastic
- Make sure water runs off the sill
- Plan mastic work ahead of painting
- Have rotten timber repaired before new mastic goes in
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
What affects the quote in Chatham Waterfront
Call for a quick quote. What matters most is:
- Working hours on commercial sites
- Any mould that needs treating
- How many rooms, windows or areas are involved
- Access and height
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or send us an email for an honest opinion and a quote.
Helping us quote
Before you ask for a quote, have a think about:
- Roughly how big the job is
- Pictures of the joints, sent by email
- Where the job is, and your postcode
- What the problem is, such as mould, gaps, leaks or cracking
Need a quote? Please phone 0345 464 0079 or email us with a few details. We will explain what we’d do and send you a clear quote before we start.
Landlords, agents and businesses in Chatham Waterfront
If you manage several properties in or around Chatham Waterfront, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.