Hampshire · England
Sand mastic for sash & case windows in Hook, Hampshire
Our applicators work in Hook on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly.
- Failed mastic on an exposed elevation
- Silicone on a period window that looks wrong
- Mastic round period door frames that has failed
How it works
The work is kept neat and contained to the area we’re working on. Expect the work to take anything from a few hours to a full day, depending on how many windows, and we tell you how long to leave it before we go. Somewhere like Hook needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Let us know about parking restrictions
- Clear items away from the joints we’re working on
Ask for a quote
If you are in Hook and need sand mastic, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Read more
Sand mastic in Hook, done properly
Silicone on a period window often looks wrong and isn’t always the right material. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. Typical jobs include draughty sash windows at the surround and mastic dropping out of the joint, on sash and case windows, timber door frames and period & listed homes.
Mastic can only go onto a dry, clean joint, so window work in Hook is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
All of our work is guaranteed for twelve months, in Hook and everywhere else we cover.
- Location
- Hook (SO31, PO14)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What sealant work cannot fix
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Sashes that rattle, stick or won’t open
- Decisions on consent for listed homes
If you are not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Where we work in Hook
- Timber door frames
- Brick reveals
- Stone surrounds
- Tenement windows
- Sash and case windows
- Period & listed homes
Common questions in Hook
Does living near the coast affect sand mastic in Hook?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Will you come out to Hook?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
How long does sand mastic take to go off?
It skins over fairly quickly but takes longer to harden fully. We will tell you what to expect for your job.
What do you need from me for a quote?
Just the basics: the address or postcode, what’s wrong and any access issues. Then phone 0345 464 0079 or send us an email.
What is sand mastic?
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 messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
What do you put in the joint?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
More services for Hook
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Looking after it afterwards
So the new joints stay in good condition:
- Don’t run silicone over sand mastic
- Look over the window mastic once a year
- Plan mastic work ahead of painting
- Leave the new mastic unpainted
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
Why act early in Hook
Filling over old, loose mastic doesn’t last. Raking out and preparing the joint gives it a sound base so the new mastic stays put. Where a wall is exposed, as many are in small places like Hook, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
What you pay reflects the work, not guesswork. That’s why we ask about the job first and give you a clear quote before we start.
Why book with us
- Anti-fungal sanitary silicone in wet areas
- Old sealant always removed completely
- We leave the area clean and tidy
- 180+ five-star Google reviews
Hook homes and the weather
Hook 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. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you let a flat or house near Swanwick station, any sash windows need sound mastic to keep draughts and rain out. Homes close to Church of St Mary include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Hook is about 1 mile south-east of Warsash, in Hampshire. We provide sand mastic to homes and businesses in Hook and nearby, as part of our work across Hampshire. Across Hampshire, we cover 683 places, Hook among them. Southampton is on our list too, about 7 miles from Hook.
Postcode districts we cover here for sand mastic: SO31 and PO14. Other places close to Hook include Abshot (1 mile east), Hook Park Estate (1 mile south-west), Titchfield Common (1 mile north-east), Warsash (1 mile north-west) and Locks Heath (1 mile north). We also work in nearby towns such as Winchester (15 miles north), Gosport (6 miles south-east), Havant (13 miles east), Eastleigh (9 miles north), Fareham (4 miles east) and Horndean (12 miles east).
What’s near Hook
Around Hook, our work takes us to homes and buildings near Hamble Common, Jolly Farmer Public House and Brookfield Community School and Language College and the streets around them. For rail, the closest station is Swanwick station, about 2.2 miles north. Nearby you’ll also find St Andrew's Castle (1.8 miles west) and Carron Row Farm Museum (2.2 miles north-east). For a walk, there’s Holly Hill Woodland Park.
Signs you need sand mastic in Hook
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint.
If you can see any of these, it’s time to have the joints looked at:
- Modern sealant on a period surround
- Old sand mastic that has cracked, crumbled or fallen out
- Patchy fillers round a sash window
- Wind and rain getting in round a sash window
Schools such as Locks Heath Infant School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- Whether the sealant suits the joint
- Whether they seal over old material or remove it
- How the surfaces are prepared before sealing
- How long to leave it before use
How we quote for sand mastic
The price is agreed before any work begins. It’s based on:
- When we can work, for business premises
- Whether there’s mould to deal with
- The product the joint needs
- How easy the joints are to reach
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The problem you’ve noticed
- How we’d reach the joints
- Where the property is
- Photos by email, if that’s easy
Want a quote for sand mastic? Please phone 0345 464 0079 or send us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before any work starts.