East Sussex · England
Sand mastic for sash & case windows in Glynde, East Sussex
Professional sand mastic in and around Glynde, with every bit of old sealant taken out first and a one-year guarantee.
- Tired mastic found when preparing windows for paint
- Cement or filler used on old window joints that has cracked
- Weathered mastic on the most exposed windows
What we can’t put right
New sealant can’t fix everything, and we’d rather say so up front. It will not solve:
- Masonry that needs repairing
- Sash cords, weights and draught-proofing of the sashes
- Planning or listed building consent (your local planning authority decides)
If in doubt, phone 0345 464 0079 or email us and we will say what we think before booking.
Where we work in Glynde
- Period & listed homes
- Timber door frames
- Stone surrounds
- Tenement windows
- Sash and case windows
- Brick reveals
How we handle sand mastic in Glynde
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant, and we’ll talk through which suits your home. We work on period & listed homes, timber door frames and tenement windows, and common reasons people get in touch are mastic round period door frames that has failed and mastic that needs renewing before redecorating.
Outdoor sealant needs dry, clean surfaces, so work on frames around Glynde is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
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.
- Where
- Glynde (BN8)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Windows and doors in Glynde
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. Historic houses like Glynde Place (about 0.1 miles north) are a reminder that the area around Glynde has older buildings as well as new. 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.
If you live in an older home near St Mary's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Glynde is about 3 miles east of Lewes, in East Sussex. Homes, rented property, offices and hotels in Glynde can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. 289 places in East Sussex are on our list, large and small. Our Brighton page covers work nearby.
Our applicators cover all of the BN8 postcode area for sand mastic. Whether your property is on Lacys Hill and Ranscombe Lane or a nearby road, our applicators can take on the job. We also cover Glyndebourne (1 mile north), Firle (1 mile south-east), Ashton Green (2 miles north), Ringmer (2 miles north) and Cliffe (2 miles west). Larger places within reach include Eastbourne (11 miles south-east), Seaford (6 miles south), Lewes (3 miles west), Hailsham (8 miles east), Crowborough (14 miles north) and Uckfield (7 miles north).
What’s near Glynde
We work in homes and buildings around Ringmer Community College and Sixth Form, Lewes and Laughton Levels and Firle Church of England Primary School. Glynde has its own railway station: Glynde station. Well-known places in the area include Lewes Castle (2.7 miles west) and Museum of Agricultural Bygones (2.4 miles north-east). Not far away are Cliffe Hill and Southerham Farm.
Different surfaces, different methods
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.
What affects the cost of sand mastic
You’ll get a clear quote before we start. It takes into account:
- Whether there’s mould to deal with
- Any working-time requirements on site
- The old material and how stubborn it is
- Whether the work is at height
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first.
Asking for a quote
Before you ask for a quote, have a think about:
- The address or postcode of the job
- How we’d reach the joints
- If it’s domestic, commercial or a hotel
- The problem you’ve noticed
We don’t publish a price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, call 0345 464 0079 or send us an email.
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
How it works
Most of a good job is in the preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it generally takes anything from a few hours to a full day, depending on how many windows. In a small place like Glynde, 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.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
How to prepare
- Tell us if parking is tricky
- Tell us about access, such as stairs, a lift or high-level joints
- Keep pets and children clear of the area while we work
Getting a quote
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Related advice
Glynde: your questions answered
Can you help a landlord with a rental near Glynde station?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Can you do sand mastic in Glynde?
Yes, Glynde is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Is the work guaranteed?
Our 12-month guarantee covers every job, sand mastic included.
Can you replace silicone on a period window with sand mastic?
Normally, yes. With the silicone removed and the joint cleaned, sand mastic is applied by hand.
How long does the job take?
It depends on the size of the job, but most jobs take a few hours per window, depending on the condition of the joints. We will tell you when we quote.
How long does sand mastic take to harden?
It takes a while. It skins first and hardens fully later and we will give you an idea for your job.
What is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Towns and villages near Glynde
Also in Glynde
When to call us in Glynde
Rain on the window surround works into any crack and pushes it out. Windows facing the weather tend to go first.
It’s worth asking for a quote if you see:
- Old cement repairs round a window that have failed
- Tired mastic found when preparing windows for paint
- Silicone on a period window that looks wrong
- Gaps round a timber door in stone or brick
If you let a flat or house near Glynde station, any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- How the surfaces are prepared before sealing
- How long the guarantee is
- How long to leave it before use
- Who does the work, and how experienced they are
Landlord and commercial work in Glynde
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
If you manage several properties in or around Glynde, several properties can go on one quote. Just tell us the addresses and what each one needs.