East Sussex · England
Seaford Sand Mastic
Window and door surrounds in Seaford need attention? We remove the old material, prepare the joints and seal them properly.
- Gaps between timber frames and stone or brick
- Tired mastic found when preparing windows for paint
- Patchy fillers round a sash window
Landlords, agents and businesses in Seaford
Letting agents and landlords in Seaford can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote, and we are fully insured for the work.
About our sand mastic in Seaford
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. If you have mastic dropping out of the joint and old cement repairs round a window that have failed, we can put it right, on tenement windows, sash and case windows and timber door frames alike.
Around Seaford, many houses have gained conservatories, French doors or replacement windows over time. Every addition brings more joints, each wearing at its own pace. Sills, frame heads and glazing joints are where leaks generally start.
There’s a 12-month guarantee on every job, large or small.
- Where
- Seaford (BN25)
- Region
- East Sussex
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Seaford
More services for Seaford
How the job changes by surface
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
Sash and case windows
The mastic round a sash window is on show, so a neat, even finish matters.
Common questions in Seaford
Is Seaford in your area for sand mastic?
Yes, Seaford is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or email us and let us know what needs doing.
Does the coastal weather in Seaford affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Is the work guaranteed?
Our 12-month guarantee applies on every job.
Will the old sealant be removed?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
What should I tell you?
Let us know what needs doing and where. We’ll ask anything else we need to know.
Can you seal over the old sealant?
No, it will not last. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
I rent my home. Can I book you?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
How we quote for sand mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The number of rooms or windows
- Access and height
- The old material and how stubborn it is
- Mould in or behind the old joints
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.
Asking for a quote
When you contact us, these details help:
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
For a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
How it works
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a single window, longer for several. Parking in a town like Seaford is usually straightforward, but tell us if there’s a driveway or any restrictions, and mention if the work is upstairs, in a flat or high on the outside.
- Each surround is checked first.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Clear items away from the joints we’re working on
- For indoor joints, keep the area dry beforehand if you can
- Let us know about parking restrictions
How to get a quote
We quote each job on its own. Simply call 0345 464 0079 or drop us an email and describe the job.
Read more
Seaford homes and the weather
Seaford is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as Seaford Primary School, the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Seaford station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Seaford is about 8 miles west of Eastbourne, in East Sussex. Seaford gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Our East Sussex coverage runs to 289 places, and Seaford is one of them. Our Brighton page covers work nearby (11 miles or so).
Our applicators cover all of BN25 for sand mastic. You’ll find streets such as High Street, Station Road and East Albany Road. Seaford sits on or near the A259, which makes travel easy. Close by, we work in Bishopstone (1 mile north-west), Norton (2 miles north-west), Tide Mills (2 miles west), Westdean (2 miles east) and Dukes Green (3 miles north-east). Larger places within reach include Eastbourne (8 miles east), Lewes (8 miles north-west), Hailsham (9 miles north-east), Uckfield (13 miles north), Newhaven (3 miles north-west) and Peacehaven (5 miles west). Seaford is one of the larger places we cover in East Sussex.
Near you in Seaford
Locally, jobs take us to homes and businesses close to St Peter's School, Seaford Head School and Seven Sisters pub, among other places. For rail, the closest station is Seaford station, roughly 0.5 miles south-west. A little further out are Newhaven Museum (2.9 miles north-west) and Arlington Castle (3.7 miles north-east). For a walk, there’s Firle Beacon.
Why deal with it now?
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 Seaford, as anywhere, most leaks start as a small gap in a joint, and they’re far easier to fix early.
What it costs depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Why us?
- An ARBOMaster approved applicator
- Sanitary silicone with an anti-fungal additive in wet areas
- 180+ five-star Google reviews
- 20+ years of sealant experience
Take a look at what affects the cost and what customers say.
Aftercare tips
After the cure time, these simple habits help:
- Don’t paint over the new mastic
- Clear gutters so water does not pour onto the windows
- Plan mastic work ahead of painting
- Ask the planning authority about consent for listed or conservation-area homes
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
Signs you need sand mastic in Seaford
Shallow joints are a common cause. Mastic that’s too thin cracks and drops out so we make sure the new mastic is the right thickness.
If you can see any of these, it’s time to have the joints looked at:
- Open joints round the window box
- Mastic that needs renewing before redecorating
- Modern sealant on a period surround
- Draughty sash windows at the surround
In the older streets around Church of St Thomas More, the joint between an old wall and a newer frame is normally the first place rain gets in.
Questions to ask before you book
- What preparation is included
- When the joint can take water or movement
- Who does the work, and how experienced they are
- What happens if they find a problem under the old sealant