Hampshire · England
Sand mastic for sash & case windows in Crawley, Hampshire
Professional sand mastic in and around Crawley, with old sealant always removed completely and a one-year guarantee.
- Mastic round period door frames that has failed
- Weathered mastic on the most exposed windows
- Draughty sash windows at the surround
Work for landlords, hotels and businesses
For anyone letting property in or around Crawley, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
How we handle sand mastic in Crawley
Our applicators renew the sand mastic around sash and case windows and doors set in stone or brick. The old mastic is raked out, and new mastic is applied and shaped by hand. We are often asked to deal with draughty sash windows at the surround and weathered mastic on the most exposed windows, across brick reveals, stone surrounds and timber door frames.
In a village or hamlet like Crawley, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
All of our work is guaranteed for twelve months.
- Place
- Crawley (SO21)
- Region
- Hampshire
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Crawley
What else we do in Crawley
How the job changes by surface
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
What happens if it’s left?
Filling over old, loose mastic doesn’t last. We remove the loose material first so the new work lasts. Older cottages and farmhouses around Crawley can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part.
Why book with us
- Experience in homes, commercial sites and hotels
- We never seal over old sealant
- Full insurance on every job
- Approved under the ARBOMaster scheme
Take a look at what affects the cost or our reviews.
How the visit works
At the end, we look at the finished work together and tell you how long to leave it. The visit itself usually takes a few hours for a single window, longer for several, depending on the size of the job. Somewhere as small as Crawley, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- Clear items away from the joints we’re working on
- Try not to wet indoor joints just before the visit
- Mention any leaks or damp you’ve noticed
Getting a quote
For a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Related advice
Your questions about sand mastic in Crawley
Can you do sand mastic in Crawley?
Yes, Crawley is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job.
Do you cover smaller places like Crawley?
Yes, Crawley is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is there any odour?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
What sealant do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for listed or conservation-area properties.
Do you guarantee sand mastic work?
Our 12-month guarantee applies on every job.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
When to call us in Crawley
Some old mastic was never deep enough. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
Signs it’s time to call us include:
- Mastic worn away on windows facing the weather
- Mastic dropping out of the joint
- Gaps between timber frames and stone or brick
- Mastic round period door frames that has failed
For an older house near a landmark such as Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Questions to ask before you book
- Whether all the old sealant comes out first
- Whether they’re fully insured
- What the quote includes, VAT included or not
- When the joint can take water or movement
Windows and doors in Crawley
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.
If you let a flat or house near Winchester station, any sash windows need sound mastic to keep draughts and rain out.
Crawley is about 5 miles north-west of Winchester, in Hampshire. Every kind of property in Crawley can book us for sand mastic. Every job comes with our 12-month guarantee. Across Hampshire, we cover 683 places, and Crawley is one of them. We also work in Southampton, around 13 miles away.
We work across the SO21 postcode area for sand mastic and the streets around it. If you’re just outside Crawley, we cover Worthy Down (3 miles east), South Wonston (3 miles east), Sutton Scotney (4 miles north-east), Barton Stacey (4 miles north) and Springvale (4 miles east). Larger places within reach include Winchester (5 miles south-east), Eastleigh (10 miles south), Andover (8 miles north-west), Totton (14 miles south), Chandler's Ford (9 miles south) and Hedge End (14 miles south).
Near you in Crawley
Around Crawley, our work takes us to homes and buildings near Fox And Hounds Public House, among other places. Crawley’s nearest station is Winchester station, about 4.5 miles south-east. A little further out are Winchester Castle (4.8 miles south-east) and Royal Hampshire County Hospital (4.5 miles south-east). For a walk, there’s Winnall Moors.
What sealant work can’t fix
We will not take on work that won’t last, so here’s what sealant can’t put right:
- Sash cords, weights and draught-proofing of the sashes
- Putty and glazing repairs
- Crumbling stone or brickwork round the window
If you are not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
Where we work in Crawley
- Stone surrounds
- Timber door frames
- Sash and case windows
- Period & listed homes
- Brick reveals
- Tenement windows
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.