Kent · England
Stone Street Sand Mastic
Window and door surrounds in Stone Street need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Mastic round period door frames that has failed
- Old cement repairs round a window that have failed
- Silicone on a period window that looks wrong
For landlords and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Sand mastic in Stone Street
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. Common call-outs are for mastic dropping out of the joint and cracked mastic round a front door frame, across brick reveals, period & listed homes and timber door frames.
Outdoor sealant needs dry, clean surfaces, so work on frames around Stone Street is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or email us.
- Place
- Stone Street (TN15)
- Region
- Kent
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Stone Street questions
Will you come out to Stone Street?
Yes, Stone Street is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Kemsing station?
Yes, rental work is part of what we do. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
What’s sand mastic made of?
Sand mastic is a traditional material for pointing round windows and doors. It combines sand with a linseed-oil-based binder.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Is sand mastic better than silicone for my windows?
We’ll help you decide. Sand mastic suits many period homes, and modern sealants suit newer frames.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we’re using and why.
Can old silicone round a sash window be swapped for sand mastic?
Generally, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
Do you do commercial work?
Yes. We can plan bigger jobs in stages.
What happens on the day
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. Expect the work to take a few hours for a single window, longer for several, and we explain the cure time before we leave. In a small place like Stone Street, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
How to prepare
- Tell us about any previous sealing or DIY attempts
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
Ask for a quote
For a quote, phone 0345 464 0079 or drop us an email with the location and a short description of the problem. We will give you a clear quote before any work starts.
Read more
When it isn’t the sealant
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Masonry that needs repairing
- Planning or listed building consent (your local planning authority decides)
- Sashes that rattle, stick or will not open
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly before you book.
Where we work in Stone Street
- Brick reveals
- Stone surrounds
- Tenement windows
- Period & listed homes
- Timber door frames
- Sash and case windows
Also near Stone Street
Also in Stone Street
Stone Street homes and the weather
Historic houses like Ightham Mote (about 1.1 miles south-east) are a reminder that the area around Stone Street 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’s traditional sand mastic. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as St Lawrence Church of England Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. If you live in an older home near St Lawrence, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Rented homes near Kemsing station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Stone Street is about 3 miles east of Sevenoaks, in Kent. We provide sand mastic to homeowners, landlords and businesses in Stone Street and the surrounding area, as part of our work across Kent. Our Kent coverage runs to 922 places, and Stone Street is one of them. We also work in London, around 22 miles away.
We work across TN15 for sand mastic and the streets around it. That includes homes and businesses on Church Road, Stone Street Road and Pond Lane and the roads around them. We also cover Bitchet Green (1 mile south-west), Ivy Hatch (1 mile east), Styants Bottom (1 mile north), Godden Green (1 mile west) and Ightham (1 mile north-east). Further out, we also cover Maidstone (12 miles east), Dartford (12 miles north), Sevenoaks (3 miles west), Royal Tunbridge Wells (9 miles south), Gravesend (12 miles north-east) and Tonbridge (5 miles south).
Landmarks near Stone Street
In Stone Street, that means homes and buildings near Sevenoaks Preparatory School, Ivy Hatch Nature Reserve and The Plough pub and the streets around them. The closest station to Stone Street is Kemsing station, roughly 1.9 miles north of the centre. Nearby you will also find Ightham Court (2.2 miles north-east) and Sevenoaks Hospital (2.8 miles north-west). Not far away are Dryhill Nature Reserve.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Why it’s worth doing now in Stone Street
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic is the traditional material and finishes neatly against the masonry. In a small place like Stone Street, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What it costs depends on the amount of work, how hard the old material is to remove and access to the work. We give a clear quote before any work starts, so you know where you stand.
Why Stone Street clients choose us
- An ARBOMaster approved applicator
- Quality sealants from Arbo and Everbuild
- We never seal over old sealant
- Neat joints and a tidy finish
Take a look at our cost guide and our reviews.
How we quote for sand mastic
We quote each job individually. This is what makes a difference:
- The number and length of the joints
- The product the joint needs
- Whether the work is at height
- Any mould that needs treating
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Helping us quote
To help us quote quickly, please include:
- The rough size of the job
- If it’s domestic, commercial or a hotel
- A few photos by email, if you can
- Access, such as stairs, a lift or height
Want a quote for sand mastic? Please call 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Aftercare tips
To keep the joints looking good and working properly:
- Clear gutters so water doesn’t pour onto the windows
- Go gently near the mastic when preparing windows
- Check the mastic when you check the paintwork
- Sort the mastic before the decorators arrive
Leave the new mastic unpainted, as traditional guidance advises. If you’re redecorating, ask us first.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.