West Sussex · England
Sand mastic for sash & case windows in Elsted Marsh, West Sussex
Sand mastic across Elsted Marsh and nearby, with old sealant always removed completely and a 12-month guarantee.
- Cracked mastic round a front door frame
- Draughts and rain around sash boxes
- Open joints round the window box
DIY versus a professional finish
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
About our sand mastic in Elsted Marsh
Across Elsted Marsh, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand for a neat, traditional finish. If you have failed mastic on an exposed elevation and gaps where the frame meets the masonry, we can put it right, on sash and case windows, period & listed homes and timber door frames alike.
Homes in small places like Elsted Marsh often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Elsted Marsh (GU29)
- Region
- West Sussex
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
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. It normally takes a few hours for a single window, longer for several. For a village or hamlet like Elsted Marsh, 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.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Move anything stored near the joints
- Keep pets and children clear of the area while we work
Get a quote
We quote each job on its own. Just ring 0345 464 0079 or send us an email with the details and send photos if you have them.
Related advice
Looking after it afterwards
After the cure time, these simple habits help:
- Take care around the mastic when scraping paint
- Ask a joiner to look at soft timber first
- Find out about consent before window work on a listed home
- Avoid patching sand mastic with silicone
Don’t touch or press the mastic while it hardens. It forms a skin fairly soon but needs longer to fully harden.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
Quotes for sand mastic in Elsted Marsh
Call for a quick quote. What matters most is:
- Access and height
- Any working-time requirements on site
- The amount of work
- Whether there’s mould to deal with
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
Helping us quote
To help us quote quickly, please include:
- How we’d reach the joints
- Pictures of the joints, sent by email
- The problem you’ve noticed
- Where the job is, and your postcode
Want a quote for sand mastic? Please ring 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and give you a clear price before we start.
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We also work for property managers and facilities teams in Elsted Marsh and across West Sussex. We can quote a run of properties together, and we’re fully insured.
Signs you need sand mastic in Elsted Marsh
Shallow joints are a common cause. Mastic that is too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
Keep an eye out for any of the following:
- Mastic dropping out of the joint
- Mastic worn away on windows facing the weather
- Wind and rain getting in round a sash window
- Patchy fillers round a sash window
Around Elsted Marsh, as everywhere, sand mastic is only as good as the preparation behind it.
What your quote should include
- What happens if they find a problem under the old sealant
- How long to leave it before use
- How the joint is cleaned and prepared
- What product goes in the joint
Elsted Marsh questions
Do you cover Elsted Marsh for sand mastic?
Yes, Elsted Marsh is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job.
Is there a guarantee on sand mastic in Elsted Marsh?
All our work, in Elsted Marsh and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
I’m a tenant. Can you help?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
What’s sand mastic made of?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Do you take out the old sealant first?
Yes, every time. New silicone does not stick to old silicone, so the joint is cleaned back first.
Do I have to be there?
If the work is inside, we need someone to let us in. Once we have agreed the job, you do not need to watch us work.
Do you hold any approvals?
Yes. We are an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Places near Elsted Marsh
Also in Elsted Marsh
Leave it or put it right?
New mastic over crumbling mastic will not hold. Raking out and preparing the joint gives it a sound base so the new mastic stays put. Where a wall is exposed, as many are in small places like Elsted Marsh, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Combining jobs into one visit usually makes better use of the time than several visits. You’ll get one clear quote for the whole job.
Why us?
- Anti-fungal silicone where joints get wet
- Approved under the ARBOMaster scheme
- Trusted Arbo and Everbuild sealants
- Over 20 years’ experience
Read what affects the cost or what customers say.
What sand mastic looks like in Elsted Marsh
Historic houses like Cowdray House (about 3.5 miles east) are a reminder that the area around Elsted Marsh has older buildings as well as new. Where a home is older, 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as St George's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Elsted Marsh is about 6 miles east of Petersfield, in West Sussex. From the centre of Elsted Marsh to the outskirts, sand mastic is available for homes and businesses alike. Our West Sussex coverage runs to 371 places, Elsted Marsh among them. For nearby work, see our Portsmouth page, about 17 miles away.
We cover every part of GU29 for sand mastic. We also cover the places around Elsted Marsh: Ingrams Green (1 mile east), Dumpford (1 mile north), Trotton (1 mile north), Elsted (1 mile south-west) and Didling (1 mile south). Further out, we also cover Bognor Regis (14 miles south-east), Chichester (10 miles south), Emsworth (10 miles south-west), Portfield (10 miles south), Yapton (14 miles south-east) and East Wittering (15 miles south).
Around Elsted Marsh
We work in homes and buildings around The Keeper's Arms Public House, among other places. A little further out are Midhurst Museum (3.2 miles east) and Midhurst Community Hospital (3.5 miles east). For a walk, there’s Iping and Stedham Commons.