East Sussex · England
Sand Mastic in Westdean
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Westdean, backed by a one-year guarantee. Call for a quick quote.
- Silicone on a period window that looks wrong
- Old cement repairs round a window that have failed
- Gaps where the frame meets the masonry
About our sand mastic in Westdean
Silicone on a period window often looks wrong and is not always the right material. Sand mastic is the traditional choice, and we can replace one with the other. We work on sash and case windows, period & listed homes and timber door frames, and the jobs we see most are gaps round a timber door in stone or brick and draughts and rain around sash boxes.
Mastic can only go onto a dry, clean joint, so window work in Westdean is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
We stand behind the work with a 12-month guarantee.
- Place
- Westdean (BN25)
- Wider area
- East Sussex
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Why act early in Westdean
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall, so dealing with it now protects both. Older cottages and farmhouses around Westdean can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why us?
- Sanitary silicone with an anti-fungal additive in wet areas
- An ARBOMaster approved applicator
- More than 20 years in sealant work
- 180+ five-star Google reviews
Read our cost guide or what customers say.
Nearby places to Westdean
More services for Westdean
How we quote for sand mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- How much there is to do
- The product the joint needs
- Working hours on commercial sites
- The old material and how stubborn it is
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- The address or postcode of the job
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
- Photos by email, if that’s easy
If you’re in Westdean and need sand mastic, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
How the job changes by surface
Period and listed homes
A traditional finish suits a period property.
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Sand mastic in Westdean: local notes
Westdean is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around older windows and doors, especially on the side facing the sea. Historic houses like Alfriston Clergy House (about 2 miles north) are a reminder that the area around Westdean 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.
For site and facilities teams at buildings such as Ladycross School, the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Seaford station? Then any sash windows need sound mastic to keep draughts and rain out. In the older streets around The Parish Church of All Saints, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Westdean is about 2 miles east of Seaford, in East Sussex. Across the BN25 area, we cover sand mastic for homes and businesses. Westdean is one of 289 places in East Sussex where we work for sand mastic. You can also see our page for Brighton, about 13 miles away.
Every address in BN25 is covered for sand mastic, from the main roads to the quietest streets. We also cover the places around Westdean: Litlington (1 mile north), Dukes Green (2 miles north), Lullington (2 miles north), Alfriston (2 miles north) and Seaford (2 miles west). Within a short drive, we also cover Eastbourne (6 miles east), Bexhill-on-Sea (14 miles east), Lewes (10 miles north-west), Hailsham (7 miles north-east), Uckfield (13 miles north) and Newhaven (5 miles west).
Near you in Westdean
Locally, jobs take us to homes and businesses close to Cuckmere Inn, Seaford Head Nature Reserve and Seaford Head School and the streets around them. For rail, the closest station is Seaford station, roughly 2.6 miles west. Other landmarks nearby include Chailey Heritage Marine Hospital (3.9 miles west) and Old Forge Museum (Alfriston) (2.2 miles north). Not far away are Combe Hill.
Landlord and commercial work in Westdean
For anyone letting property in or around Westdean, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
DIY sealant or a professional job?
If you’re 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.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Common questions in Westdean
Can you help a landlord with a rental near Seaford station?
Yes. We work for letting agents and landlords as well as householders, and several properties can be quoted together. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Will you come out to Westdean?
Yes, Westdean is covered. 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.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Is it possible to paint over sand mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
How long does sand mastic take?
Most jobs take anything from a few hours to a full day, depending on how many windows, including preparation and clearing up. We’ll confirm how long when we quote.
Do you take out the old sealant first?
Yes, always, and completely. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
The process
We keep the work tidy and contained to the area we are working on, so you can get on with your day. The job normally takes anything from a few hours to a full day, depending on how many windows, and we tell you how long to leave it before we go. For a village or hamlet like Westdean, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We start by checking each surround and agreeing the joints to renew.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Keep pets and children clear of the area while we work
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
Getting a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we will take it from there.
Related advice
Honest limits
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Decisions on consent for listed homes
- Putty and glazing repairs
- Damaged stone surrounds
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Surfaces we seal
- Tenement windows
- Brick reveals
- Stone surrounds
- Period & listed homes
- Sash and case windows
- Timber door frames