Hampshire · England
Sand mastic for sash & case windows in Langstone, Hampshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Langstone, with a 12-month guarantee on every job. Call for a quick quote.
- A silicone bead on a sash window that spoils the look
- Gaps round a timber door in stone or brick
- Mastic worn away on windows facing the weather
For landlords and businesses
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured.
Sand mastic in Langstone, done properly
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. We’re often asked to deal with draughty sash windows at the surround and open joints round the window box, on stone surrounds, tenement windows and brick reveals.
Somewhere as small as Langstone, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
We stand behind the work with a 12-month guarantee, so you’re not left on your own once the job is done.
- Location
- Langstone (PO9, PO11)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Leave it or put it right?
If you are redecorating, renew the mastic first. Painting over failed mastic doesn’t seal it and traditional guidance is to leave the new mastic unpainted. Where a wall is exposed, as many are in small places like Langstone, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, phone 0345 464 0079 or email us for an honest opinion and a quote.
Why Langstone customers choose us
- We never seal over old sealant
- Approved under the ARBOMaster scheme
- Neat joints and a tidy finish
- We are fully insured
Take a look at our cost guide and what customers say.
Also near Langstone
What else we do in Langstone
Frames and glazing around Langstone
Langstone is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. With historic houses such as Warblington Castle (about 0.8 miles north-east) nearby, there’s older building stock in the area around Langstone as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you look after a building such as Bosmere Junior School, larger buildings have plenty of frames, and the mastic around each one ages. In the older streets around Saint Nicholas' Chapel, the joint between an old wall and a newer frame is normally the first place rain gets in. For landlords with property near Havant station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Langstone is about 2 miles south of Havant, in Hampshire. If you need sand mastic in Langstone, it’s easy to get a quote: please phone 0345 464 0079 or email us. We are based in Crawley and cover Hampshire. Across Hampshire, we cover 683 places, Langstone among them.
Jobs for sand mastic in PO9 and PO11 works the same way as everywhere else we cover. You will find streets such as Mill Lane, Langstone Road and Langstone High Street, and we cover them all. Being close to the A3023, Langstone is easy for our applicators to reach. If you’re just outside Langstone, we cover Warblington (1 mile east), Northney (1 mile south-east), Denvilles (1 mile north-east), Stoke (1 mile south) and North Hayling (1 mile south-east). Further out, we also cover Gosport (8 miles west), Fareham (9 miles west), Horndean (5 miles north), Hedge End (15 miles west), Waterlooville (4 miles north-west) and Petersfield (12 miles north).
Around Langstone
Around Langstone, our work takes us to homes and buildings near The Royal Oak pub and Warblington School and the streets around them. For rail, the closest station is Havant station, roughly 1.1 miles north. A little further out are Warblington Castle (0.8 miles north-east) and Havant Museum (0.8 miles north). Not far away are Southmoor Nature Reserve.
What affects the cost of sand mastic
You’ll get a clear quote before we start. It’s based on:
- How easy the joints are to reach
- Whether there’s mould to deal with
- Working hours on commercial sites
- How many rooms, windows or areas are involved
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we will explain the quote if you ask.
Helping us quote
Before you ask for a quote, have a think about:
- Whether it’s a home or a business
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
- Any previous sealing or DIY work
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you’re ready, phone 0345 464 0079 or email us.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Avoid patching sand mastic with silicone
- Take care around the mastic when scraping paint
- Check the mastic when you check the paintwork
- Renew mastic before redecorating the windows
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Can I do it myself?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Your questions about sand mastic in Langstone
Does living near the coast affect sand mastic in Langstone?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
I let a flat near Havant station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Is it possible to take out silicone and use sand mastic instead?
Yes. The silicone is cut out and the joint cleaned, then point it with sand mastic.
Should I check with the council before work on a listed or conservation-area home?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
How long does the job take?
As a guide, most jobs take a few hours for a single window, longer for several. Bigger jobs take longer, and we will tell you how long to expect.
What exactly is sand mastic?
Sand plus a binder based on linseed oil. It’s applied by hand and finished to sit neatly against the masonry.
Should I use sand mastic or silicone?
Sand mastic normally suits period timber windows best. On modern frames, we’d normally use a flexible sealant, and we’ll explain why.
Where do you work from?
We work from Crawley. Our applicators cover Langstone.
What sealant work cannot fix
New sealant can’t fix everything, and we will tell you before we start. It will not solve:
- Decisions on consent for listed homes
- Cracked or broken glass
- Damaged stone surrounds
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before booking.
Joints and surfaces we work on
- Brick reveals
- Stone surrounds
- Tenement windows
- Sash and case windows
- Timber door frames
- Period & listed homes
What we do, step by step
The work is kept neat and contained to the joints we’re treating, so you can carry on as normal. Expect the work to take a few hours per window, depending on the condition of the joints, and we explain the cure time before we leave. Somewhere as small as Langstone, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
How to prepare
- Clear items away from the joints we are working on
- Let us know about stairs, lifts or work at height
- Plan for the work area to be out of bounds to pets and children
How to get a quote
We quote each job on its own. Simply ring 0345 464 0079 or email us and describe the job, and photos are welcome.