East Sussex · England
Sand mastic for sash & case windows in Kent Street, East Sussex
Problem with your window and door surrounds in Kent Street? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Mastic that needs renewing before redecorating
- Draughts and rain around sash boxes
- Patchy fillers round a sash window
Sand mastic for homes and businesses in Kent Street
Silicone on a period window often looks wrong and does not suit the building. Sand mastic is the traditional choice, and we can replace one with the other. Typical jobs include weathered mastic on the most exposed windows and old sand mastic that has cracked, crumbled or fallen out, across sash and case windows, period & listed homes and brick reveals.
Homes in small places like Kent Street often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
We stand behind the work with a 12-month guarantee, so you are covered after we’ve gone.
- Location
- Kent Street (TN33)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
What we are called out for in Kent Street
Timber frames move with the seasons. The movement cracks the mastic little by little.
Keep an eye out for any of the following:
- Failed mastic on an exposed elevation
- Gaps where the frame meets the masonry
- Wind and rain getting in round a sash window
- Modern sealant on a period surround
Durhamford Manor, about 2.2 miles north-west, is one of the historic houses in the wider area around Kent Street.
Comparing quotes
- When the joint can take water or movement
- How much experience the applicator has
- Whether all the old sealant comes out first
- What insurance they hold
What affects the cost of sand mastic
The price is agreed before any work begins. It takes into account:
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
- The amount of work
- Working hours on commercial sites
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Asking for a quote
When you contact us, these details help:
- What’s wrong with the joints now
- How we’d reach the joints
- Where the job is, and your postcode
- Any previous sealing or DIY work
Need a quote? Please ring 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Also near Kent Street
Also in Kent Street
Your questions about sand mastic in Kent Street
Is Kent Street within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Battle station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can go on one quote. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
How long does sand mastic take to go off?
It takes a while. It skins first and hardens fully later, and we’ll tell you what to expect.
How long does the job take?
That depends on how much there is to do, but as a guide it takes anything from a few hours to a full day, depending on how many windows. We will give you a better idea when we quote.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and we’ll quote it together.
Are you fully insured?
Yes. We are fully insured, and we can confirm the details when we quote.
Is sand mastic better than silicone for my windows?
It depends on the window. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
What’s sand mastic made of?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Frames and glazing around Kent Street
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Durhamford Manor (about 2.2 miles north-west) nearby, there’s older building stock in the area around Kent Street as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For landlords with property near Battle station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Managing a site like Ark Helenswood Academy? Then its window and door frames need their mastic kept sound, just like a home’s.
Kent Street is about 3 miles north of Hastings, in East Sussex. Whether you are in the middle of Kent Street or further out, sand mastic is available for homes and businesses alike. Across East Sussex, we cover 289 places, and Kent Street is one of them. Brighton is on our list too, about 30 miles from Kent Street.
Every address in TN33 is within our area for sand mastic. We also cover the places around Kent Street: Westfield (1 mile east), Telham (2 miles west), Sedlescombe (2 miles north), Whatlington (2 miles north-west) and Brede (3 miles north-east). Within a short drive, we also cover Eastbourne (14 miles south-west), Hastings (3 miles south), Bexhill-on-Sea (6 miles south-west), Hailsham (13 miles west), St Leonards (4 miles south) and Polegate (14 miles south-west).
Landmarks near Kent Street
Kent Street’s nearest station is Battle station, roughly 2.2 miles west. Nearby you’ll also find Hastings Castle (4.3 miles south-east) and Conquest Hospital (2.2 miles south-east). For a walk, there’s Senlac Hill and Church Wood and Robsack Wood.
Looking after it afterwards
So the new joints stay in good condition:
- Keep modern sealant off the mastic
- Clear gutters so water does not pour onto the windows
- Avoid heavy scraping on the mastic joint
- Ask a joiner to look at soft timber first
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
What happens on the day
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours for a single window, longer for several. Somewhere as small as Kent Street, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about stairs, lifts or work at height
- Clear the area around the work
Ask for a quote
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, ring 0345 464 0079 or drop us an email.
Read more
Different surfaces, different methods
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.
What sealant work cannot fix
New sealant cannot fix everything, and we’d rather say so up front. Sealant won’t put right:
- Whether work needs listed building consent
- Timber that has rotted
- Sash cords, weights and draught-proofing of the sashes
If in doubt, phone 0345 464 0079 or email us and we will say what we think before booking.
Surfaces we seal
- Stone surrounds
- Timber door frames
- Brick reveals
- Sash and case windows
- Period & listed homes
- Tenement windows