West Sussex · England
Sand Mastic in Coates
Professional sand mastic in and around Coates, with old sealant always removed completely and a one-year guarantee.
- Mastic worn away on windows facing the weather
- Mastic round period door frames that has failed
- A silicone bead on a sash window that spoils the look
What sand mastic looks like in Coates
Historic houses like Bignor Roman Villa (about 2.1 miles south) are a reminder that the area around Coates has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as Fittleworth CofE Village School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Pulborough station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Coates is about 10 miles north of Littlehampton, in West Sussex. Coates gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 371 towns and villages across West Sussex, from the larger towns to small villages. We also work in Crawley, about 20 miles from Coates.
Every address in RH20 is within our area for sand mastic. Neighbouring places we cover for sand mastic include Lower Horncroft (1 mile east), Fittleworth (1 mile north-east), Bedham (1 mile north-east), Watersfield (2 miles south-east) and Coldwaltham (2 miles south-east). Larger places within reach include Horsham (14 miles north-east), Worthing (12 miles south-east), Bognor Regis (12 miles south-west), Chichester (12 miles south-west), Littlehampton (10 miles south) and Lancing (14 miles south-east).
Around Coates
We work in homes and buildings around The Swan Hotel. The nearest railway station is Pulborough station, roughly 2.7 miles east of the centre. Other landmarks nearby include Coates Castle (0.5 miles south-west) and Coultershaw Heritage Site (2 miles north-west). Green spaces nearby include Bignor Hill and Amberley Wild Brooks.
How we handle sand mastic in Coates
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant, and we’ll talk through which suits your home. We work on brick reveals, tenement windows and period & listed homes, and the jobs we see most are mastic worn away on windows facing the weather and tired mastic found when preparing windows for paint.
In a village or hamlet like Coates, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
There’s a 12-month guarantee on every job, large or small.
- Where
- Coates (RH20)
- Region
- West Sussex
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
More services for Coates
What the job involves on each surface
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. The gap round it is pointed with sand mastic.
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.
Honest limits
New sealant cannot fix everything, and we’ll tell you before work begins. It won’t solve:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Crumbling stone or brickwork round the window
- Sash cords, weights and draught-proofing of the sashes
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Joints and surfaces we work on
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Brick reveals
- Timber door frames
- Tenement windows
FAQs for Coates
Will you come out to Coates?
Yes, we do. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you work for landlords with property near Pulborough station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Coates.
How long will you be here?
Typically it takes a few hours for a single window, longer for several. Bigger jobs take longer, and we’ll say how long yours will take.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do I have to be there?
If the work is inside, we need someone to let us in. Once we’ve agreed the job, you don’t need to watch us work.
Can sand mastic be painted?
Traditional guidance is not to paint over sand mastic. Ask us before you decorate around it and we’ll talk you through it.
Is it possible to take out silicone and use sand mastic instead?
Yes, we do this often. All the old silicone is removed first so the mastic can sit properly.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
Signs you need sand mastic in Coates
Timber frames move with the seasons. The movement cracks the mastic little by little.
Keep an eye out for these signs:
- Mastic dropping out of the joint
- Draughts and rain around sash boxes
- Cracked mastic round a front door frame
- Cement or filler used on old window joints that has cracked
In the older streets around Church of St Agatha, the joint between an old wall and a newer frame is generally the first place rain gets in.
Before you book anyone
- Are they insured?
- Whether you can choose the colour
- What preparation is included
- What the quote includes, VAT included or not
Leave it or put it right?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic doesn’t seal it, and the new mastic is traditionally left unpainted. In a small place like Coates, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why book with us
- Full insurance on every job
- Domestic, commercial and hotel work
- A 12-month guarantee on all work
- An ARBOMaster approved applicator
Take a look at how sealant jobs are priced and our reviews.
What affects the quote in Coates
We don’t publish a price list. The quote depends on:
- How many areas need sealing
- Which sealant suits the joint
- Whether there’s mould to deal with
- The number and length of the joints
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and agree the price before starting.
Helping us quote
When you call or email, it’s useful to know:
- If someone has resealed it before
- A few pictures by email, if you can
- Whether it’s a home or a business
- The address or postcode of the job
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
What we do, step by step
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes anything from a few hours to a full day, depending on how many windows. Somewhere like Coates needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Tell us about any previous sealing or DIY attempts
- Clear the area around the work
Getting a quote
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and send you a clear quote before any work starts.