West Sussex · England
Sand mastic for sash & case windows in Colgate, West Sussex
Problem with your window and door surrounds in Colgate? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Open joints round the window box
- Modern sealant on a period surround
- Wind and rain getting in round a sash window
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Go gently near the mastic when preparing windows
- Plan mastic work ahead of painting
- Have rotten timber repaired before new mastic goes in
- Leave the new mastic unpainted
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look before trying a quick fix.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
How we handle sand mastic in Colgate
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. We are often asked to deal with weathered mastic on the most exposed windows and window mastic to renew ahead of painting, on brick reveals, tenement windows and timber door frames.
Outdoor sealant needs dry, clean surfaces, so work on frames around Colgate is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
All of our work is guaranteed for twelve months, in Colgate and everywhere else we cover.
- Where
- Colgate (RH13, RH12)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Questions from Colgate
Is Colgate in your area for sand mastic?
Yes. Our work covers London and the South East, and Colgate is part of that. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll send you a clear quote.
Can you help a landlord with a rental near Faygate station?
Yes. We work for letting agents and landlords as well as householders, and several properties can be quoted together. You can call 0345 464 0079 or email us with the details for a clear quote.
Is sand mastic better than silicone for my windows?
We will talk it through with you. Sand mastic suits many period homes, and modern sealants suit newer frames.
Does someone need to be in?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Can old silicone round a sash window be swapped for sand mastic?
Yes. We remove the silicone and clean the joint, then point it with sand mastic.
How the job changes by surface
Sash and case windows
Sash windows are where we do most sand mastic work. We renew the mastic round each box.
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. We renew it the same way as on windows.
What happens on the day
There’s no need to move everything out before we come, only the area right around the joints. Everything nearby is protected, and the job takes anything from a few hours to a full day, depending on how many windows in most cases. Somewhere as small as Colgate, 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.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Keep pets and children clear of the area while we work
- Tell us about any water getting in
Ask for a quote
Want a quote for sand mastic? Please ring 0345 464 0079 or drop us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Advice
Towns and villages near Colgate
Other services in Colgate
Frames and glazing around Colgate
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Tyes Place (about 4.5 miles south-east) are a reminder that the area around Colgate has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as St. Saviour's Church, the joint between an old wall and a newer frame is normally the first place rain gets in. Schools such as Colgate Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Faygate station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Colgate is about 3 miles south-west of Crawley, in West Sussex. From the centre of Colgate to the outskirts, sand mastic is available for homes and businesses alike. Colgate is one of 371 towns and villages in West Sussex we cover.
Our applicators cover all of RH13 and RH12 for sand mastic. You will find streets such as Forest Road, Vicarage Close and Blackhouse Road, and we cover them all. Other places close to Colgate include Kilnwood Vale (1 mile north), Faygate (1 mile north-west), Broadfield (2 miles north-east), Roffey (2 miles west) and Handcross (3 miles south-east). We also work in nearby towns such as Crawley (3 miles north-east), Horsham (4 miles west), Haywards Heath (9 miles south-east), Burgess Hill (10 miles south-east), East Grinstead (11 miles east) and Storrington (14 miles south-west).
What’s near Colgate
Typical jobs here are in homes near The Dragon pub, Target Hill Park and Cottesmore School and the streets around them. The nearest railway station is Faygate station, roughly 1.3 miles north-west. A little further out are Crawley Museum (3.4 miles north-east) and County Mall (3.4 miles north-east). Not far away are Tilgate Lake and Warnham LNR.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
When something else is needed
In fairness, some problems need a different trade:
- Masonry that needs repairing
- Rotten sashes, sills or window boxes (a joiner’s job)
- Broken panes
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
What we seal
- Stone surrounds
- Tenement windows
- Sash and case windows
- Timber door frames
- Brick reveals
- Period & listed homes
Landlords, agents and businesses in Colgate
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Quotes for sand mastic in Colgate
You’ll get a clear quote before work begins. It takes into account:
- When we can work, for business premises
- The number of rooms or windows
- The size of the job
- The product the joint needs
Doing several joints on one visit normally makes better use of the time than several visits. We’ll give you a clear price for the lot.
What we need to know
Before you ask for a quote, have a think about:
- Pictures of the joints, sent by email
- If someone has resealed it before
- How many joints, rooms or windows are involved
- What the problem is, such as mould, gaps, leaks or cracking
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.