Kent · England
Sand Mastic in Hersden
Sand mastic in Hersden from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Patchy fillers round a sash window
- Wind and rain getting in round a sash window
- Window mastic to renew ahead of painting
What happens on the day
On the day, we start by going over the job with you. Surfaces next to the work are protected before any work begins. Most jobs take anything from a few hours to a full day, depending on how many windows. For a job in Hersden, 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 each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- Mention any tricky access
- Tell us about any previous sealing or DIY attempts
- Mention any sign-in or site rules at work premises
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will explain what’s involved.
Related advice
How we handle sand mastic in Hersden
On many period windows, sand mastic looks right and suits the building. Newer frames generally get a flexible sealant instead, and we will talk through which suits your home. We work on timber door frames, sash and case windows and stone surrounds, and the jobs we see most are tired mastic found when preparing windows for paint and wind and rain getting in round a sash window.
In a smaller place like Hersden, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. That is hard on the mastic around frames and sills.
Every job comes with our one-year guarantee.
- Where
- Hersden (CT3)
- Wider area
- Kent
- Cover
- A year, on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
When to call us in Hersden
Previous repairs in cement or silicone often trap water or crack away. They do not move with the timber and we normally remove them.
The problems people normally mention when they call are:
- Draughty sash windows at the surround
- Mastic dropping out of the joint
- Gaps where the frame meets the masonry
- Weathered mastic on the most exposed windows
Homes close to Church of All Saints include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
What to look for in a quote
- Which sealant they’ll use, and why
- How hidden problems are handled
- How the joint is cleaned and prepared
- When the joint can take water or movement
What we cannot put right
We will not take on work that won’t last, so here’s what sealant cannot put right:
- Masonry that needs repairing
- Timber that has rotted
- Putty and glazing repairs
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Timber door frames
- Sash and case windows
- Brick reveals
- Tenement windows
- Stone surrounds
- Period & listed homes
What affects the cost of sand mastic
Call for a quick quote. What matters most is:
- The number and length of the joints
- When we can work, for business premises
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- What’s wrong with the joints now
- The type of property
- Access, such as stairs, a lift or height
- The rough size of the job
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Do not run silicone over sand mastic
- Ask us before painting near the mastic
- Sort the mastic before the decorators arrive
- Ask a joiner to look at soft timber first
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens as more mastic falls out.
Hersden homes and the weather
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Sturry station change hands often, and any sash windows need sound mastic to keep draughts and rain out. Managing a site like Hersden Village Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Hersden is about 4 miles south of Herne Bay, in Kent. From the centre of Hersden to the outskirts, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. Hersden is one of 922 towns and villages in Kent we cover. There’s also a page for Chelmsford, about 41 miles away.
Postcode districts we cover here for sand mastic: CT3. That includes homes and businesses on The Firs, The Sycamores and Chequer Tree Close and the roads around them. If you are just outside Hersden, we cover Westbere (1 mile south-west), Stodmarsh (1 mile south-east), Hoath (1 mile north), Knave's Ash (1 mile north) and Sturry (2 miles west). We also work in nearby towns such as Canterbury (4 miles south-west), Margate (11 miles north-east), Dover (14 miles south-east), Ramsgate (11 miles east), Broadstairs (12 miles east) and Whitstable (6 miles north-west).
Around Hersden
Typical jobs here are in homes near Frank Montgomery School, Spires Academy and Ye Olde Yew Tree Inn, among other places. The nearest railway station is Sturry station, about 1.9 miles south-west of the centre. Other landmarks nearby include Canterbury Castle (4.5 miles south-west) and St Martins Hospital (3.4 miles south-west). Green spaces nearby include West Blean and Thornden Woods.
Hersden: your questions answered
Will you come out to Hersden?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
I let a flat near Sturry station. Can you help?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
What does sand mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we’ll talk you through it.
Can you do several jobs on one visit?
Yes, and it often makes sense. Doing several areas at once is usually more efficient.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We’ll tell you what we are using and why.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint.
How long does the job take?
A typical job takes a few hours for a single window, longer for several, including the preparation. Your quote will say how long we expect yours to take.
Places near Hersden
What else we do in Hersden
For landlords and businesses
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Different surfaces, different methods
Timber door frames
Doors face weather and wear and the mastic can crack early. It’s renewed by hand.
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We can do one window or several.