West Sussex · England
Sand Mastic in Cootham
Professional sand mastic in and around Cootham, with old sealant always removed completely and a 12-month guarantee.
- Mastic dropping out of the joint
- Cracked mastic round a front door frame
- Gaps where the frame meets the masonry
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Clear gutters so water does not pour onto the windows
- Avoid heavy scraping on the mastic joint
- Check with your local planning authority if your home is listed
- Check the mastic when you check the paintwork
Don’t touch or press the mastic while it hardens. It forms a skin fairly soon, but takes longer to harden fully.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall, so renewing it early is worth it.
About our sand mastic in Cootham
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. Typical jobs include modern sealant on a period surround and window mastic to renew ahead of painting, across period & listed homes, sash and case windows and tenement windows.
Somewhere as small as Cootham, older homes often have timber frames set in stone or brickwork. 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, and the guarantee is the same wherever you are.
- Location
- Cootham (RH20)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Common questions in Cootham
Do you cover smaller places like Cootham?
Yes, Cootham is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is Cootham in your area for sand mastic?
Yes. We work across London and the South East, and Cootham is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing.
How long does sand mastic take to go off?
Not right away. It skins first and hardens fully later, and we will tell you what to expect.
Can I paint the new mastic?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Where are you based?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Do I need to be at home?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
DIY versus a professional finish
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
A careful DIYer can reseal a simple joint, 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.
What the job involves on each surface
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
Sand mastic in Cootham: local notes
With historic houses such as Parham House (about 1.1 miles west) nearby, there’s older building stock in the area around Cootham as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For landlords with property near Pulborough station, older sash windows in a rental need their mastic kept sound to keep the weather out. If you look after a building such as Storrington Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Parham House, about 1.1 miles west, is one of the historic houses in the wider area around Cootham, and older homes nearby need a sealant that suits their walls.
Cootham is about 7 miles north-west of Worthing, in West Sussex. We provide sand mastic to homes and businesses in Cootham. Across West Sussex, we cover 371 places, and Cootham is one of them. You can also see our page for Brighton, about 16 miles away.
All of RH20 is within our area for sand mastic, from the main roads to the quietest streets. If you need sand mastic at a property on Warren Croft, Pulborough Road and The Crescent or a nearby road, our applicators can take on the job. Nearby, we also carry out sand mastic in Storrington (1 mile east), Wiggonholt (2 miles north-west), Sullington (2 miles south-east), West Chiltington Common (2 miles north) and Abingworth (2 miles north-east). Within a short drive, we also cover Horsham (12 miles north-east), Worthing (7 miles south-east), Bognor Regis (13 miles south-west), Chichester (15 miles west), Burgess Hill (15 miles east) and Littlehampton (8 miles south).
Landmarks near Cootham
Typical jobs here are in homes near Rydon Community College, Parham Park and The Crown Inn and the streets around them. The nearest railway station is Pulborough station, roughly 3.3 miles north-west of the centre. A little further out are The Storrington And District Museum (1 mile east) and Amberley Castle (3.2 miles west). Open spaces near Cootham include Chanctonbury Hill and Amberley Wildbrooks RSPB Reserve.
Honest limits
We’d rather tell you now than do work that will not last, so these are the limits:
- Decayed frames that need repair
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
If in doubt, phone 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Sash and case windows
- Tenement windows
- Brick reveals
- Stone surrounds
- Timber door frames
- Period & listed homes
Towns and villages near Cootham
More services for Cootham
Landlord and commercial work in Cootham
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
How the visit works
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes a few hours per window, depending on the condition of the joints and we leave things clean and tidy. Somewhere as small as Cootham, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Mention any tricky access
- Mention any parking rules near the property
How to get a quote
Getting a quote is simple: tell us what needs doing and where. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.
Read more
Why deal with it now?
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and finishes neatly against the masonry. Older cottages and farmhouses around Cootham can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
What you pay reflects the work, not guesswork. That’s why we ask a few questions first.
Why book with us
- We leave the area clean and tidy
- 20+ years of sealant experience
- Old sealant always removed completely
- Every job guaranteed for a year
Read our cost guide or what customers say.