Kent · England
Sand mastic for sash & case windows in Kemsley, Kent
Sand mastic in Kemsley from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Modern sealant on a period surround
- Gaps between timber frames and stone or brick
- Cracked mastic round a front door frame
Sand mastic in Kemsley, done properly
Across Kemsley, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand, finished to suit the masonry. If you have mastic round period door frames that has failed and cement or filler used on old window joints that has cracked, we can put it right, whatever the surface.
In a smaller place like Kemsley, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. The mastic around frames on those walls tends to age faster.
Every job is covered by a one-year guarantee, wherever you are in Kent.
- Place
- Kemsley (ME10, ME9)
- Region
- Kent
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Kemsley homes and the weather
Kemsley is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Kemsley station change hands often, and any sash windows need sound mastic to keep draughts and rain out. If you look after a building such as Kemsley Primary Academy, larger buildings have plenty of frames, and the mastic around each one ages. If you live in an older home near Parish Church of the Holy Trinity, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Kemsley is about 1 mile north of Sittingbourne, in Kent. Across the ME10 area, we can carry out sand mastic at your property. Our Kent coverage runs to 922 places, and Kemsley is one of them. You can also see our page for Chelmsford, about 28 miles away.
Our applicators cover all of the ME10 and ME9 postcode area for sand mastic and the streets around it. That includes homes and businesses on Court Road, Menin Road and Hurst Lane and the roads around them. We also cover the places around Kemsley: Howt Green (1 mile west), Milton Regis (1 mile south-east), Sittingbourne (1 mile south), Iwade (1 mile north-west) and Murston (1 mile south). Larger places within reach include Maidstone (11 miles south-west), Whitstable (13 miles east), Faversham (7 miles south-east), Minster (5 miles north-east), Davington (7 miles south-east) and Foley Park (10 miles south-west).
Local landmarks in Kemsley
Locally, jobs take us to homes and businesses close to Milton Creek Country Park, The Three Hats Inn and Borden Grammar School, among other places. There’s a railway station in Kemsley itself: Kemsley station. A little further out are Castle Rough (0.6 miles east) and Court Hall Museum (0.8 miles south-west).
Also near Kemsley
Also in Kemsley
What sealant work can’t fix
We’d rather tell you now than do work that won’t last, so these are the limits:
- Planning or listed building consent (your local planning authority decides)
- Damaged stone surrounds
- Sashes that rattle, stick or won’t open
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Surfaces we seal
- Tenement windows
- Sash and case windows
- Period & listed homes
- Stone surrounds
- Timber door frames
- Brick reveals
Kemsley: your questions answered
Can you help a landlord with a rental near Kemsley station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Does the coastal weather in Kemsley affect outside sealant?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Is it possible to take out silicone and use sand mastic instead?
Yes, it’s a common request. All the old silicone is removed first so the mastic can sit properly.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll explain our choice.
Can I choose the sealant colour?
Generally, yes. Sealants come in white, clear, grey and other colours, and we will agree it with you first.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
How long does sand mastic take to go off?
Not right away. It skins first and hardens fully later and we will give you an idea for your job.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
How to look after the new joints
After the cure time, these simple habits help:
- Find out about consent before window work on a listed home
- Go gently near the mastic when preparing windows
- Keep sills and gutters clear so water drains away
- Check the mastic when you check the paintwork
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Why act early in Kemsley
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in and new mastic seals them. In a smaller place like Kemsley, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Combining jobs into one visit is normally more efficient than separate visits. You will get one clear quote for the whole job.
Why us?
- Tidy, careful work
- ARBOMaster approved applicator
- A 12-month guarantee on all work
- Rated 4.9 stars on Google
See our cost guide or what customers say.
Work for landlords, hotels and businesses
We work for landlords and agents as well as householders. Sealant work between tenants keeps a property looking cared for.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
How the visit works
At the end, we look at the finished work together and explain the cure time. The visit itself usually takes anything from a few hours to a full day, depending on how many windows, depending on the size of the job. For a job in Kemsley, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic is not too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email pictures if that is easy.
Read more
What affects the cost of sand mastic
There’s no set price list, because no two jobs are the same. The quote depends on:
- Working hours on commercial sites
- The number and length of the joints
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first.
Helping us quote
Photos help, but a description is a good start. Please mention:
- A few photos by email, if you can
- Any previous sealing or DIY work
- What’s wrong with the joints now
- The rough size of the job
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or drop us an email.
Should I try it myself first?
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, then guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.