Kent · England
Sand mastic for sash & case windows in Coombe, Kent
Sand mastic for Coombe, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Failed mastic on an exposed elevation
- Crumbling sand mastic round a window
- Gaps round a timber door in stone or brick
How we handle sand mastic in Coombe
If your home is listed or in a conservation area, check with your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. We work on sash and case windows, tenement windows and period & listed homes, and the jobs we see most are gaps where the frame meets the masonry and old sand mastic that has cracked, crumbled or fallen out.
Somewhere as small as Coombe, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
Whatever the size of the job, you get the same one-year guarantee in Coombe and across Kent.
- Place
- Coombe (CT3, CT13)
- Wider area
- Kent
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Tenement and terrace windows
Where a building is shared, window work may involve neighbours, so check who is responsible first.
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
For landlords and businesses
Landlords and letting agents in Coombe can book us as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Also near Coombe
What else we do in Coombe
What affects the quote in Coombe
For a quick quote, just ask. The main things that affect it are:
- Which sealant suits the joint
- How easy the joints are to reach
- Working hours on commercial sites
- Any mould that needs treating
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. We give a clear quote before work begins.
What we need to know
To help us quote quickly, please include:
- How many joints, rooms or windows are involved
- Photos by email, if that’s easy
- How we’d reach the joints
- Where the job is, and your postcode
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Signs you need sand mastic in Coombe
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows.
These are the problems we’re asked about most:
- Mastic round period door frames that has failed
- Crumbling sand mastic round a window
- Draughts and rain around sash boxes
- Mastic worn away on windows facing the weather
For landlords with property near Sandwich station, any sash windows need sound mastic to keep draughts and rain out.
Questions to ask before booking
- Whether you can choose the colour
- Whether all the old sealant comes out first
- Who does the work, and how experienced they are
- How long the guarantee is
Why it’s worth doing now in Coombe
Not every filler suits an old window surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. In a small place like Coombe, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll explain what it covers.
Why choose Mr Mastic in Coombe
- We’re fully insured
- 4.9 on Google from 180+ five-star reviews
- More than 20 years in sealant work
- Homes, businesses and hotels
See our cost guide or our reviews.
Questions from Coombe
Is Coombe in your area for sand mastic?
Yes, Coombe is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we will give you a clear price.
Is Coombe within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
How long does sand mastic take to harden?
It takes a while. It skins first and hardens fully later, and we will tell you what to expect.
Is there any odour?
There can be a smell while the sealant cures. Opening a window helps.
Do you do commercial work?
Yes. We can plan bigger jobs in stages to suit the site.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
How much does sand mastic cost in Coombe?
Size, access and the old material all affect the cost. Ask us for a quote.
What exactly is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder for the joint between timber frames and masonry.
Frames and glazing around Coombe
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Goodnestone Park (about 3.5 miles south-west) are a reminder that the area around Coombe has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For site and facilities teams at buildings such as Ash Cartwright and Kelsey Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s. In the older streets around Church of St Nicholas, the joint between an old wall and a newer frame is generally the first place rain gets in.
Coombe is about 6 miles north-west of Deal, in Kent. We carry out sand mastic for householders, landlords and businesses in Coombe and nearby, as part of our work across Kent. 922 places in Kent are on our list. For nearby work, see our Chelmsford page (47 miles or so).
All of CT3 and CT13 is within our area for sand mastic, from the main roads to the quietest streets. Streets in the area include Coombe Lane, Saunders Lane and Langdon Avenue. If you’re just outside Coombe, we cover Flemings (1 mile south-west), Ash (1 mile north-west), Weddington (1 mile north), Guilton (1 mile west) and Hammill Park (1 mile south). Larger places within reach include Canterbury (9 miles west), Margate (8 miles north-east), Dover (9 miles south), Folkestone (14 miles south-west), Ramsgate (7 miles north-east) and Broadstairs (9 miles north-east).
What’s near Coombe
Around Coombe, our work takes us to homes and buildings near The Chequer Inn and Sandwich Technology School, among other places. The closest station to Coombe is Sandwich station, roughly 2.1 miles east of the centre. Well-known places in the area include White Mill (1.6 miles east). For a walk, there’s Monk's Wall nature reserve.
When something else is needed
We will always be straight with you, so here’s what sealant cannot fix:
- Masonry that needs repairing
- Timber that has rotted
- Broken panes
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
Surfaces we seal
- Stone surrounds
- Sash and case windows
- Timber door frames
- Tenement windows
- Period & listed homes
- Brick reveals
How the visit works
The work is kept neat and contained to the area we are working on. The job generally takes anything from a few hours to a full day, depending on how many windows, and we explain the cure time before we leave. In a small place like Coombe, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- 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.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention if the joints have been sealed before
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
Every job is quoted individually, so the first step is telling us about yours. Simply ring 0345 464 0079 or email us and describe the job and send photos if you have them.