West Sussex · England
Sand mastic for sash & case windows in Tower Hill, West Sussex
We cover Tower Hill for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Old sand mastic that has cracked, crumbled or fallen out
- Weathered mastic on the most exposed windows
- Draughts and rain around sash boxes
Sand mastic for homes and businesses in Tower Hill
A silicone bead around a sash window can look out of place and is not always the right material. Sand mastic is the traditional choice, and we can replace one with the other. Common call-outs are for window mastic to renew ahead of painting and gaps between timber frames and stone or brick, on brick reveals, period & listed homes and timber door frames.
Around Tower Hill, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or email us.
- Location
- Tower Hill (RH13)
- Wider area
- West Sussex
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Signs you need sand mastic in Tower Hill
Rain on the window surround works into any crack and loosens it further. Exposed elevations normally fail first.
The most common problems we see are:
- Mastic round period door frames that has failed
- Crumbling sand mastic round a window
- Cement or filler used on old window joints that has cracked
- Tired mastic found when preparing windows for paint
For landlords with property near Christs Hospital station, older sash windows in a rental need their mastic kept sound to keep the weather out.
What to look for in a quote
- Who does the work, and how experienced they are
- Whether they seal over old material or remove it
- When the joint can take water or movement
- What preparation is included
Can I do it myself?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Tower Hill: your questions answered
Can you help a landlord with a rental near Christs Hospital station?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Do you cover smaller places like Tower Hill?
Yes. Tower Hill is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Where are you based?
We work from Crawley. We cover Tower Hill and the rest of West Sussex.
Do you offer different sealant colours?
In most cases you can choose. We will explain which colours are available and agree one before work begins.
Is it possible to take out silicone and use sand mastic instead?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
Can I paint the new mastic?
It’s traditionally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
Do you guarantee sand mastic work?
You get our 12-month guarantee on every job.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Broken panes
- Timber that has rotted
- Damaged stone surrounds
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
Joints and surfaces we work on
- Sash and case windows
- Period & listed homes
- Brick reveals
- Timber door frames
- Stone surrounds
- Tenement windows
How it works
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to a full day, depending on how many windows and we leave things clean and tidy. In a small place like Tower Hill, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- Try not to wet indoor joints just before the visit
- Keep pets and children clear of the area while we work
- Mention if the joints have been sealed before
Getting a quote
Need a quote? Please ring 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear quote before we start.
Read more
Windows and doors in Tower Hill
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.
In the older streets around Parish Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Managing a site like St John's Catholic Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Tower Hill is about 1 mile south-west of Horsham, in West Sussex. Jobs in Tower Hill get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. Tower Hill is one of 371 towns and villages in West Sussex we cover. For nearby work, see our Crawley page.
Jobs for sand mastic in RH13 is quoted and booked the same way as anywhere else. Whether your property is on Tower Hill, Tower Close and Salisbury Road or a nearby road, we can help. We also cover the places around Tower Hill: Broadbridge Heath (1 mile north-west), Horsham (1 mile north-east), Southwater (2 miles south), Itchingfield (2 miles west) and Warnham (2 miles north). Further out, we also cover Crawley (8 miles north-east), Haywards Heath (11 miles east), Burgess Hill (11 miles south-east), East Grinstead (15 miles east), Shoreham-by-Sea (15 miles south) and Broadfield (7 miles north-east).
Local landmarks in Tower Hill
Around Tower Hill, our work takes us to homes and buildings near Tanbridge House School, Warnham Park and The Doyle School of Design and Technology, among other places. The closest station to Tower Hill is Christs Hospital station, roughly 0.9 miles west. Well-known places in the area include Horsham Hospital (1.3 miles north-east) and Christs Hospital School Museum (1.1 miles south-west). For a walk, there’s Warnham LNR.
Why act early in Tower Hill
Replacing sash windows is a big decision for a period home and on a listed home, consent may be needed. Where the frames are in good order, new mastic seals the surround. Where a wall is exposed, as many are in small places like Tower Hill, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or send us an email.
Why book with us
- Trusted Arbo and Everbuild sealants
- More than 20 years in sealant work
- 12-month guarantee on every job
- Sanitary silicone with an anti-fungal additive in wet areas
What affects the quote in Tower Hill
Every job gets its own quote. This is what makes a difference:
- How easy the joints are to reach
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
- Any working-time requirements on site
What you pay reflects the work, not guesswork. That’s why we ask about the job first and agree the price before starting.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Photos by email, if that’s easy
- If someone has resealed it before
- Any access issues, like height or stairs
- Where the job is, and your postcode
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that’s easy.