West Sussex · England
Sand Mastic in Walderton
Sand mastic across Walderton and nearby, with every bit of old sealant taken out first and a one-year guarantee.
- Cement or filler used on old window joints that has cracked
- Modern sealant on a period surround
- Old sand mastic that has cracked, crumbled or fallen out
About our sand mastic in Walderton
Silicone on a period window often looks wrong and is not always the right material. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. We’re often asked to deal with patchy fillers round a sash window and cracked mastic round a front door frame, on timber door frames, stone surrounds and sash and case windows.
Somewhere as small as Walderton, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Walderton (PO18)
- Wider area
- West Sussex
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Cracked or broken glass
- Whether work needs listed building consent
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Stone surrounds
- Tenement windows
- Brick reveals
- Timber door frames
- Period & listed homes
- Sash and case windows
Nearby places to Walderton
Also in Walderton
How to look after the new joints
Good habits help new joints last longer. A few tips:
- Do not paint over the new mastic
- Go gently near the mastic when preparing windows
- Look over the window mastic once a year
- Don’t run silicone over sand mastic
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
How the job changes by surface
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours, so check who is responsible first.
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Landlords, agents and businesses in Walderton
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We also work for property managers and facilities teams in Walderton and across West Sussex. We can quote a run of properties together, and we are fully insured for the work.
What happens if it’s left?
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic suits the building and blends with the stone or brick. In a small place like Walderton, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or send us an email and we will talk you through it.
What you get with us
- Experience in homes, commercial sites and hotels
- Trusted Arbo and Everbuild sealants
- Old sealant always removed completely
- 20+ years of sealant experience
See what affects the cost and customer reviews.
Frames and glazing around Walderton
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 Uppark (about 4.3 miles north) are a reminder that the area around Walderton 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.
Homes close to The Parish Church of St Mary include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in. For landlords with property near Nutbourne station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Walderton is about 5 miles east of Havant, in West Sussex. Jobs in Walderton get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Across West Sussex, we cover 371 places, and Walderton is one of them. Portsmouth is on our list too, around 10 miles away.
All of PO18 is covered for sand mastic. We also cover Lordington (1 mile south-west), Racton (1 mile south-west), Funtington (2 miles south-east), Hambrook (2 miles south) and West Ashling (3 miles south-east). We also work in nearby towns such as Bognor Regis (11 miles south-east), Chichester (6 miles south-east), Selsey (12 miles south), Emsworth (4 miles south-west), Portfield (6 miles south-east) and Yapton (13 miles south-east).
Landmarks near Walderton
We work in homes and buildings around Stansted Park, among other places. For rail, the closest station is Nutbourne station, about 3.1 miles south of the centre. Other landmarks nearby include Havant War Memorial Hospital (5.3 miles south-west) and Warblington Castle (4.9 miles south-west). Not far away are Walderton Down and Kingley Vale National Nature Reserve.
What we do, step by step
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a single window, longer for several. Somewhere like Walderton 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.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- For business premises, tell us about site rules or sign-in
- Move anything stored near the joints
How to get a quote
We do not publish a price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or email us.
Related advice
Walderton: your questions answered
Do you cover Walderton for sand mastic?
Yes, Walderton is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we’ll send you a clear quote.
Do you cover smaller places like Walderton?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do I need to be at home?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We’ll tell you what we’re using and why.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Can I paint the new mastic?
Traditional guidance is not to paint over sand mastic. If you’re redecorating the window, ask us first and we’ll talk you through it.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Should I use sand mastic or silicone?
We’ll help you decide. Period homes often look best with sand mastic, and modern sealants suit newer frames.