East Sussex · England
Sand mastic for sash & case windows in Cooksbridge, East Sussex
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Cooksbridge. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Old cement repairs round a window that have failed
- Weathered mastic on the most exposed windows
- Wind and rain getting in round a sash window
About our sand mastic in Cooksbridge
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. We work on sash and case windows, period & listed homes and brick reveals, and people most often call us about weathered mastic on the most exposed windows and crumbling sand mastic round a window.
Mastic can only go onto a dry, clean joint, so window work in Cooksbridge is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
A 12-month guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Cooksbridge (BN8)
- Region
- East Sussex
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Can I do it myself?
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
What sealant work can’t fix
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Crumbling stone or brickwork round the window
- Whether work needs listed building consent
- Sash cords, weights and draught-proofing of the sashes
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Where we work in Cooksbridge
- Tenement windows
- Stone surrounds
- Brick reveals
- Period & listed homes
- Timber door frames
- Sash and case windows
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Do not run silicone over sand mastic
- Have rotten timber repaired before new mastic goes in
- Clear gutters so water doesn’t pour onto the windows
- Inspect the joints round the windows every year or so
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
How we quote for sand mastic
Jobs vary more than people expect. The main factors:
- The size of the job
- Any mould that needs treating
- When we can work, for business premises
- Which sealant suits the joint
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Helping us quote
To make quoting easier, let us know:
- Whether it has been sealed before
- The address or postcode of the job
- Photos by email, if that’s easy
- Whether it’s a home or a business
Need a quote? Please call 0345 464 0079 or send us an email with a few details. We’ll explain what we’d do and give you a clear quote before any work starts.
Landlords, agents and businesses in Cooksbridge
For anyone letting property in or around Cooksbridge, several properties can be quoted together. Just tell us the addresses and what each one needs.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Nearby places to Cooksbridge
What else we do in Cooksbridge
Windows and doors in Cooksbridge
With historic houses such as Anne of Cleves House (about 2.5 miles south) nearby, there’s older building stock in the area around Cooksbridge 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. 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.
For landlords with property near Cooksbridge station, older sash windows in a rental need their mastic kept sound to keep the weather out. Managing a site like Hamsey Community Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near Church of St Peter, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Cooksbridge is about 2 miles north of Lewes, in East Sussex. Whether you are in the middle of Cooksbridge or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our East Sussex coverage runs to 289 places, and Cooksbridge is one of them. We also work in Brighton, about 7 miles from Cooksbridge.
We work across BN8 for sand mastic. If you need sand mastic at a property on Station Mews, Chatfield Close and Chandler's Mead or a nearby road, our applicators can take on the job. Neighbouring places we cover for sand mastic include Chiltington (1 mile north-west), Barcombe (1 mile north-east), Barcombe Cross (2 miles north-east), Barcombe Mills (2 miles north-east) and Upper Wellingham (2 miles east). Larger places within reach include Eastbourne (15 miles south-east), Seaford (10 miles south-east), Hailsham (12 miles east), Crowborough (13 miles north-east), Uckfield (7 miles north-east) and Newhaven (8 miles south).
Around Cooksbridge
We work in homes and buildings around The Rainbow Inn and the streets around them. There’s a railway station in Cooksbridge itself: Cooksbridge station. Other landmarks nearby include Lewes Victoria Hospital (2 miles south) and Lewes Castle (2.3 miles south). Green spaces nearby include Malling Down and Offham Hill.
Leave it or put it right?
Not every filler suits an old window surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. Where a wall is exposed, as many are in small places like Cooksbridge, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
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 we need extra access for height. Your quote takes all of that into account.
Why us?
- 4.9 on Google from 180+ five-star reviews
- Every job guaranteed for a year
- An ARBOMaster approved applicator
- Homes, businesses and hotels
Read our cost guide and what customers say.
The process
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours per window, depending on the condition of the joints and we leave things clean and tidy. Somewhere like Cooksbridge 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.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
- On commercial sites, let us know about site rules
Get a quote
For sand mastic in Cooksbridge, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
Questions from Cooksbridge
Do you work for landlords with property near Cooksbridge 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 will give you a clear quote.
Can you do sand mastic in Cooksbridge?
Yes. Our work covers London and the South East, and Cooksbridge is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
Is it possible to take out silicone and use sand mastic instead?
Generally, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Cooksbridge and the rest of East Sussex, along with the rest of our area.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
What does sand mastic cost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Can you do several jobs on one visit?
Yes. More than one area can be quoted together.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first.