East Sussex · England
Sand mastic for sash & case windows in Nash Street, East Sussex
Sand mastic across Nash Street and nearby, with every bit of old sealant taken out first.
- Tired mastic found when preparing windows for paint
- Open joints round the window box
- Draughts and rain around sash boxes
Common problems we fix in Nash Street
Previous repairs in cement or silicone often trap water or crack away. They don’t move with the timber, and they usually need raking out.
Keep an eye out for these signs:
- Mastic dropping out of the joint
- Wind and rain getting in round a sash window
- Gaps where the frame meets the masonry
- Failed mastic on an exposed elevation
Letting a property close to Berwick (Sussex) station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Questions to ask before booking
- Whether they seal over old material or remove it
- What guarantee comes with the work
- Who does the work, and how experienced they are
- How the surfaces are prepared before sealing
How we handle sand mastic in Nash Street
We renew sand mastic around sash windows and doors set in stone or brick. Out comes the old, loose mastic, and new mastic is applied and shaped by hand. Common call-outs are for gaps where the frame meets the masonry and crumbling sand mastic round a window, across stone surrounds, sash and case windows and tenement windows.
Around Nash Street, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Big or small, it’s backed by our one-year guarantee in Nash Street and across East Sussex.
- Where
- Nash Street (BN27)
- Wider area
- East Sussex
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
A visit follows a simple pattern: we look at the joints together, protect the area around them, carry out the job and clear up. It normally takes anything from a few hours to a full day, depending on how many windows. Somewhere like Nash Street needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- Each surround is checked first.
- The joint is raked out and cleaned.
- 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.
Getting ready for the visit
- Mention if the joints have been sealed before
- Tell us about any water getting in
- Let us know about parking restrictions
Get a quote
Every job is quoted individually, so start by telling us what you need. Simply call 0345 464 0079 or send us an email and describe the job.
Read more
Your questions about sand mastic in Nash Street
Is Nash Street in your area for sand mastic?
Yes. Our work covers London and the South East, and Nash Street is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Do you work for landlords with property near Berwick (Sussex) station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
How long does sand mastic take?
That depends on the amount of work, but as a guide it takes a few hours for a single window, longer for several. We will give you a better idea when we quote.
Which is right for my windows, sand mastic or modern sealant?
That depends on your windows. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses and we’re fully insured.
What’s sand mastic made of?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and shaped to suit the surround.
Is it possible to paint over sand mastic?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
Should I try it myself first?
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.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
How to look after the new joints
Looking after new joints is easy:
- Ask the planning authority about consent for listed or conservation-area homes
- Ask us before painting near the mastic
- Make sure water runs off the sill
- Take care around the mastic when scraping paint
Do not touch or press the mastic while it hardens. It skins over quickly but needs longer to fully harden.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
Towns and villages near Nash Street
Other services in Nash Street
Why deal with it now?
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall, so dealing with it now protects both. Where a wall is exposed, as many are in small places like Nash Street, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Doing several joints on one visit usually makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
What you get with us
- 4.9 on Google from 180+ five-star reviews
- More than 20 years in sealant work
- We leave the area clean and tidy
- ARBOMaster approved applicator
See our cost guide and customer reviews.
What the job involves on each surface
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
What sealant work cannot fix
New sealant cannot fix everything, and we’d rather say so up front. It will not solve:
- Timber that has rotted
- Cracked or broken glass
- Masonry that needs repairing
If in doubt, ring 0345 464 0079 or email us and we will say what we think.
Where we work in Nash Street
- Sash and case windows
- Tenement windows
- Timber door frames
- Stone surrounds
- Brick reveals
- Period & listed homes
Nash Street 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. With historic houses such as Horselunges Manor (about 2 miles east) nearby, there’s older building stock in the area around Nash 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.
Homes close to The Parish Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. For site and facilities teams at buildings such as Chiddingly Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Nash Street is about 3 miles north-west of Hailsham, in East Sussex. Wherever you are in the BN27 postcode area, our applicators can take on sand mastic. Across East Sussex, we cover 289 places, and Nash Street is one of them. Our Brighton page covers work nearby, about 15 miles away.
Here we cover the BN27 postcode area for sand mastic. We also cover the places around Nash Street: Lower Dicker (1 mile south-east), Upper Dicker (2 miles south), Lower Horsebridge (2 miles south-east), Tile Hurst (2 miles south-east) and Upper Horsebridge (2 miles south-east). We also work in nearby towns such as Eastbourne (8 miles south-east), Bexhill-on-Sea (12 miles east), Seaford (9 miles south-west), Lewes (9 miles west), Hailsham (3 miles south-east) and Crowborough (11 miles north).
Local landmarks in Nash Street
In Nash Street, that means homes and buildings near The Golden Cross Inn and the streets around them. The closest station to Nash Street is Berwick (Sussex) station, about 3.9 miles south-west. A little further out are Sussex Farm Museum (3.3 miles north-east) and Hellingly Hospital Railway (2.6 miles east). Not far away are Selwyns Wood.