Kent · England
Sand Mastic in Mersham
Sand mastic across Mersham and nearby, with old sealant always removed completely and a one-year guarantee.
- Crumbling sand mastic round a window
- Modern sealant on a period surround
- Gaps between timber frames and stone or brick
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Make sure water runs off the sill
- Leave the new mastic unpainted
- Don’t run silicone over sand mastic
- Plan mastic work ahead of painting
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Sound mastic protects the frame. Failed mastic lets water reach the timber, which can lead to rot.
Sand mastic in Mersham
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. We rake it out and renew it and tidies the surround. We work on timber door frames, sash and case windows and brick reveals, and common reasons people get in touch are crumbling sand mastic round a window and weathered mastic on the most exposed windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Mersham is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Every job comes with our one-year guarantee, wherever you are in Kent.
- Place
- Mersham (TN25)
- Region
- Kent
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Sand mastic in Mersham: local notes
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Westenhanger Castle (about 4.7 miles east) nearby, there’s older building stock in the area around Mersham 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.
If you look after a building such as Mersham Primary School, the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Ashford International station, any sash windows need sound mastic to keep draughts and rain out.
Mersham is about 3 miles south-east of Ashford, in Kent. Homes, rented property, offices and hotels in Mersham is covered for sand mastic. Every job comes with our 12-month guarantee. Mersham is one of 922 towns and villages in Kent where we work for sand mastic. You can also see our page for Chelmsford, about 47 miles away.
Here we cover the TN25 postcode area for sand mastic. We cover properties on Church Road, The Street and Church Close and the roads around them. Other places close to Mersham include Sevington (1 mile north-west), South Stour (1 mile south-west), Ridgeway (1 mile east), Hinxhill Park (2 miles north) and Smeeth (2 miles east). Larger places within reach include Ashford (3 miles north-west), Canterbury (13 miles north-east), Folkestone (11 miles east), Faversham (14 miles north), Hythe (7 miles south-east) and Davington (14 miles north).
What’s near Mersham
Locally, jobs take us to homes and businesses close to The Farriers Arms and Poulton Wood and the streets around them. The closest station to Mersham is Ashford International station, roughly 2.9 miles north-west of the centre. Other landmarks nearby include Ashford Designer Outlet (2.6 miles north-west) and William Harvey Hospital (1.7 miles north-west). For a walk, there’s Hatch Park.
Do you need sand mastic in Mersham?
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
Common reasons people contact us are:
- Old cement repairs round a window that have failed
- Mastic dropping out of the joint
- Open joints round the window box
- Cracked mastic round a front door frame
In the older streets around Church of St John the Baptist, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before you book
- When the joint can take water or movement
- The length of the guarantee
- How the joint is cleaned and prepared
- How much experience the applicator has
How the job changes by surface
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we will confirm what’s needed.
Brick reveals
Sand mastic is also used where timber frames meet brick. It suits older brickwork.
For landlords and businesses
Hotels need rooms back in use, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
We also work for property managers and facilities teams in Mersham and across Kent. We can quote a run of properties together, and we are fully insured.
Common questions in Mersham
Can you do sand mastic in Mersham?
Yes. Our work covers London and the South East, and Mersham is part of that. Just phone 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
Will you come out to Mersham?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Can old silicone round a sash window be swapped for sand mastic?
Yes, we do this often. The old silicone has to come out completely so the mastic beds in well.
Can I add another job to the visit?
Of course. Doing several areas at once is normally more efficient, so mention them when you ask for a quote.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, and for outside work we will agree access with you when we book.
Do you guarantee sand mastic work?
Our 12-month guarantee applies on every job.
Can I choose the sealant colour?
We will suggest a colour to suit the surroundings. The choice depends on the product the joint needs.
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Leave it or put it right?
Not every filler suits an old window surround. Sand mastic matches what was there and that can be important for listed homes. In a small place like Mersham, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will explain what it covers.
What you get with us
- Anti-fungal silicone where joints get wet
- 4.9 on Google from 180+ five-star reviews
- Tidy, careful work
- Old sealant always removed completely
Take a look at our cost guide or our reviews.
Nearby places to Mersham
Also in Mersham
The process
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. It generally takes a few hours per window, depending on the condition of the joints. Somewhere like Mersham needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Mention any tricky access
- Clear items away from the joints we’re working on
- Mention if the joints have been sealed before
Getting a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we’ll explain what’s involved.