West Sussex · England
Sand mastic for sash & case windows in Yapton, West Sussex
Window and door surrounds in Yapton need attention? We cut out the old, prepare the joints and apply the right sealant.
- Gaps where the frame meets the masonry
- Tired mastic found when preparing windows for paint
- Failed mastic on an exposed elevation
How we handle sand mastic in Yapton
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 older homes, it suits the building far better than silicone. We work on sash and case windows, period & listed homes and brick reveals, and common reasons people get in touch are gaps between timber frames and stone or brick and mastic that needs renewing before redecorating.
In a smaller place like Yapton, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. The mastic around frames on those walls tends to age faster.
All our work is covered by a one-year guarantee, wherever you are in West Sussex.
- Location
- Yapton (BN18)
- Region
- West Sussex
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
If you manage several properties in or around Yapton, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
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. Sand mastic seals the joint round it.
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
How we quote for sand mastic
The price is agreed before any work begins. It’s based on:
- The type of sealant required
- Working hours on commercial sites
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
Combining jobs into one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We’ll give you a clear quote for the lot.
What to tell us for a quote
To make quoting easier, please include:
- The address or postcode of the job
- If it’s domestic, commercial or a hotel
- A few pictures by email, if you can
- Access, such as stairs, a lift or height
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand.
Also near Yapton
More services for Yapton
Do you need sand mastic in Yapton?
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint.
People generally contact us after spotting one of these:
- Cracked mastic round a front door frame
- Patchy fillers round a sash window
- Weathered mastic on the most exposed windows
- Mastic that needs renewing before redecorating
Managing a site like Yapton CE Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- What happens if they find a problem under the old sealant
- Whether they seal over old material or remove it
- Whether VAT is included
- What insurance they hold
Yapton questions
Does living near the coast affect sand mastic in Yapton?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Will you come out to Yapton?
Yes. Yapton is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is it possible to take out silicone and use sand mastic instead?
In most cases. The silicone is cut out and the joint cleaned before the sand mastic goes in.
How long does sand mastic take?
Typically it takes anything from a few hours to a full day, depending on how many windows. Larger jobs naturally take longer, and we will tell you how long to expect.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
How much does sand mastic cost in Yapton?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. Then call 0345 464 0079 or send us an email.
What’s sand mastic made of?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
What we do, step by step
We bring everything the job needs with us, so there’s nothing for you to buy. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours per window, depending on the condition of the joints. Parking around Yapton is normally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- Let us know about parking restrictions
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any leaks or damp you’ve noticed
Ask for a quote
We quote each job on its own. Just ring 0345 464 0079 or send us an email with the details, and photos are welcome.
Read more
Windows and doors in Yapton
Yapton is close to 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. 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.
For landlords with property near Barnham station, any sash windows need sound mastic to keep draughts and rain out.
Yapton is about 4 miles north-east of Bognor Regis, in West Sussex. Every kind of property in Yapton can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Our West Sussex coverage runs to 371 places, Yapton among them. We also work in Portsmouth, around 20 miles away.
All of BN18 is within our area for sand mastic, from the main roads to the quietest streets. You will find streets such as Church Road, Dunnock Square and Charles Square, all of which we cover. Main roads around Yapton include the B2132. We also cover the places around Yapton: Bilsham (1 mile south), Barnham (1 mile north-west), Flansham (2 miles south-west), West Barnham (2 miles north-west) and Walberton (2 miles north). We also work in nearby towns such as Worthing (9 miles east), Bognor Regis (4 miles south-west), Chichester (7 miles west), Selsey (10 miles south-west), Littlehampton (4 miles east) and Shoreham-by-Sea (15 miles east).
Near you in Yapton
Around Yapton, our work takes us to homes and buildings near St Philip Howard Catholic High School, among other places. The nearest railway station is Barnham station, about 1.5 miles north-west. Well-known places in the area include Bognor Regis Museum (3.9 miles south-west) and Arundel and District Hospital (3.2 miles north-east). The countryside around Yapton includes WWT Arundel.
Why it’s worth doing now in Yapton
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. In a smaller place like Yapton, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
Why choose Mr Mastic in Yapton
- Approved under the ARBOMaster scheme
- We are fully insured
- 180+ five-star Google reviews
- Every job guaranteed for a year
Read what affects the cost or our reviews.
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Ask a joiner to look at soft timber first
- Go gently near the mastic when preparing windows
- Sort the mastic before the decorators arrive
- Leave the new mastic unpainted
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.