West Sussex · England
Sand mastic for sash & case windows in West Marden, West Sussex
Professional sand mastic in and around West Marden, with old sealant always removed completely and a 12-month guarantee.
- Old cement repairs round a window that have failed
- Crumbling sand mastic round a window
- Tired mastic found when preparing windows for paint
What happens on the day
Before we leave, we go over the finished joints with you. The visit itself generally takes a few hours for a single window, longer for several, depending on the amount of work. For a village or hamlet like West Marden, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Mention any parking rules near the property
- Mention any sign-in or site rules at work premises
- Tell us about any previous sealing or DIY attempts
Getting a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we’ll take it from there.
Related advice
Sand mastic for homes and businesses in West Marden
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. We are often asked to deal with old sand mastic that has cracked, crumbled or fallen out and mastic that needs renewing before redecorating, on timber door frames, stone surrounds and sash and case windows.
Homes in small places like West Marden often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
You get a 12-month guarantee, the same in West Marden as everywhere else we work.
- Where
- West Marden (PO18)
- Wider area
- West Sussex
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Your questions about sand mastic in West Marden
Do you cover smaller places like West Marden?
Yes. West Marden is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is West Marden in your area for sand mastic?
Yes, West Marden is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
When will the new mastic be hard?
It forms a skin fairly soon, then hardens over a longer period. The weather and joint depth both affect it.
Do you guarantee sand mastic work?
There’s a 12-month guarantee on every job.
How long will you be here?
Most jobs take a few hours per window, depending on the condition of the joints. We’ll confirm how long when we quote.
What should I tell you?
Tell us what needs doing and where, with photos by email if possible. We will ask anything else we need to know.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
How do I get a quote for sand mastic in West Marden?
Size, access and the old material all affect the cost. Call for a quick quote.
Quotes for sand mastic in West Marden
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Whether the work is at height
- The number of rooms or windows
- Which sealant suits the joint
- How much old sealant there is and how hard it is to remove
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and give you a clear price before work begins.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- How many joints, rooms or windows are involved
- Whether it has been sealed before
- The problem you’ve noticed
- Any access issues, like height or stairs
There’s no standard price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, call 0345 464 0079 or send us an email.
Aftercare tips
To keep the joints looking good and working properly:
- Look over the window mastic once a year
- Plan mastic work ahead of painting
- Don’t run silicone over sand mastic
- Check with your local planning authority if your home is listed
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
For landlords and businesses
We work for landlords and agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
What sand mastic looks like in West Marden
Historic houses like Uppark (about 2.6 miles north) are a reminder that the area around West Marden 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. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Compton and Up Marden CofE Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. For an older house near a landmark such as The Parish Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
West Marden is about 5 miles east of Horndean, in West Sussex. Jobs in West Marden get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 371 places across West Sussex, from the larger towns to small villages. There’s also a page for Portsmouth, roughly 11 miles from West Marden.
We cover every part of PO18 for sand mastic and the streets around it. We also cover the places around West Marden: Forestside (1 mile south-west), Chalton (3 miles north-west), Blendworth (4 miles west), Buriton (5 miles north-west) and Nursted (5 miles north). We also work in nearby towns such as Bognor Regis (13 miles south-east), Chichester (8 miles south-east), Selsey (14 miles south), Emsworth (5 miles south), Portfield (8 miles south-east) and Yapton (14 miles south-east).
Landmarks near West Marden
Around West Marden, our work takes us to homes and buildings near The Coach And Horses Public House and the streets around them. The nearest railway station is Rowlands Castle station, about 2.8 miles south-west of the centre. Well-known places in the area include Havant War Memorial Hospital (5.6 miles south-west) and Clanfield Earthwork (4.1 miles north-west). For a walk, there’s Kingley Vale National Nature Reserve and Compton Down.
When to call us in West Marden
Over the years, sand mastic weathers. It hardens, cracks and starts to come away on the stone or timber.
Look out for these signs:
- Open joints round the window box
- Gaps round a timber door in stone or brick
- Draughty sash windows at the surround
- Cement or filler used on old window joints that has cracked
Letting a property close to Rowlands Castle station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Before you book anyone
- What the cure time is
- Is the old sealant removed completely?
- What guarantee comes with the work
- How the joint is cleaned and prepared
Nearby places to West Marden
What else we do in West Marden
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
What the job involves on each surface
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
Tenement and terrace windows
Windows above ground floor need the right access. Let us know the floor and we will confirm access.