East Sussex · England
Sand mastic for sash & case windows in Hastings, East Sussex
Our applicators work in Hastings on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Old cement repairs round a window that have failed
- Open joints round the window box
- Gaps round a timber door in stone or brick
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Have rotten timber repaired before new mastic goes in
- Avoid patching sand mastic with silicone
- Look over the window mastic once a year
- Go gently near the mastic when preparing windows
Do not run silicone over the new mastic. If anything cracks, get it looked at rather than patching it.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
Sand mastic for homes and businesses in Hastings
Sand mastic skins over fairly quickly but full hardening takes longer. Traditional guidance is not to paint over it, so ask us before you decorate. Typical jobs include gaps where the frame meets the masonry and silicone on a period window that looks wrong, on sash and case windows, tenement windows and brick reveals.
In Hastings, windows range from older timber frames to modern uPVC and aluminium, plus conservatories, patio doors and rooflights. Each needs the right sealant, and each joint wears out eventually.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Hastings (TN34, TN38, TN37, TN35)
- Wider area
- East Sussex
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Sand mastic in Hastings: local notes
Hastings is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around older windows and doors, especially on the side facing the sea. 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 an older house near a landmark such as St Luke's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Schools such as St Paul's Church of England Academy are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Hastings is in East Sussex. Across the TN34 area, our applicators can take on sand mastic. Hastings is one of 289 places in East Sussex where we work. There’s also a page for Brighton, about 30 miles away.
Postcode districts we cover here for sand mastic: TN34, TN38, TN37 and TN35. You will find streets such as London Road, Church Road and Upper Church Road, all of which we cover. You will find Hastings on the A21 and A28, so it’s easy for us to get to with everything needed for sand mastic. We also cover Silverhill (1 mile west), Blacklands (1 mile east), St Helen's (1 mile north-east), Hollington (1 mile north-west) and St Leonards (1 mile south-west). We also work in nearby towns such as Eastbourne (13 miles south-west), Bexhill-on-Sea (4 miles west), Hailsham (13 miles west), Polegate (14 miles west), Old Town (15 miles south-west) and Heathfield (15 miles north-west). Being one of East Sussex’s larger places, Hastings has every kind of property, from flats to offices.
Local landmarks in Hastings
Typical jobs here are in homes near William Parker Sports College, University School and The Duke pub, among other places. Hastings’s nearest station is St Leonards Warrior Square station, about 0.9 miles south. A little further out are Conquest Hospital (1.2 miles north) and Priory Meadow Shopping Centre (1.1 miles south-east). For a walk, there’s Senlac Hill and Church Wood and Robsack Wood.
How the visit works
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes a few hours per window, depending on the condition of the joints from start to finish. Commercial jobs in Hastings can be planned out of hours where a building can’t close, while home visits are arranged within our normal working hours, Monday to Saturday.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Mention if the joints have been sealed before
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Every job is quoted individually, so start by telling us what you need. Just ring 0345 464 0079 or drop us an email with the details and send pictures if you have them.
Related advice
Questions from Hastings
Can you help a landlord with a rental near St Leonards Warrior Square station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Does living near the coast affect sand mastic in Hastings?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Should I use sand mastic or silicone?
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.
Can old silicone round a sash window be swapped for sand mastic?
Normally, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
Do you guarantee sand mastic work?
There’s a 12-month guarantee on every job, sand mastic included.
How long will you be here?
It depends on the size of the job, 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.
What do you put in the joint?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Leave it or put it right?
Not every filler suits an old window surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. For businesses in Hastings, a room closed because of a leak or mould costs more than the sealant, so failing joints are best replaced on a planned basis.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or email us.
Why book with us
- Tidy, careful work
- Any old sealant cut out fully, not covered over
- Homes, businesses and hotels
- We are fully insured
Take a look at our cost guide and our reviews.
Work for landlords, hotels and businesses
Landlords and letting agents in Hastings can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Towns and villages near Hastings
Other services in Hastings
What affects the quote in Hastings
The quote reflects the job in front of us. We look at:
- The number and length of the joints
- Working hours on commercial sites
- Whether the work is at height
- The number of rooms or windows
What you pay reflects the work, not guesswork. That is why we ask about the job first.
Helping us quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Whether it has been sealed before
- The problem you’ve noticed
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
If you’re in Hastings and need sand mastic, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
What the job involves on each surface
Tenement and terrace windows
In shared buildings, the windows may be part of a wider repair so it’s worth checking responsibilities.
Stone surrounds
Old stone surrounds are often uneven, so the gap isn’t the same all the way round. Sand mastic is shaped by hand to suit.
Signs you need sand mastic in Hastings
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint.
The most common problems we see are:
- Wind and rain getting in round a sash window
- Failed mastic on an exposed elevation
- Mastic that needs renewing before redecorating
- Modern sealant on a period surround
Letting a property close to St Leonards Warrior Square station? Then any sash windows need sound mastic to keep draughts and rain out.
What your quote should include
- Are they insured?
- Which colour the sealant will be
- Is the old sealant removed completely?
- How much experience the applicator has