East Sussex · England
Mastic man in Crowborough
Resealing and weatherproof mastic for Crowborough’s hilltop period houses, family homes and flats, high on the edge of Ashdown Forest.
- Old sealant cut out, never covered
- ARBOMaster approved
- One-year guarantee on every job
Your local mastic man for Crowborough
Crowborough sits higher than almost anywhere else in the High Weald, and its homes take the weather that comes with that. Mr Mastic, based in Crawley, covers the whole town, from Crowborough Warren and the streets around the Cross to Jarvis Brook, resealing bathrooms and kitchens and renewing the mastic around windows, doors and external joints.
We work the same way on every job. The old sealant comes out completely, because new silicone laid over old will not bond and soon fails. Then the joint is cleaned, dried and, where needed, primed before a fresh bead of Arbo or Everbuild sealant goes on. It takes a little longer than a quick patch, but it lasts. If you’d like to talk a job through first, just get in touch.
A Victorian health resort that kept on growing
The railway arrived in 1868, and Crowborough was soon promoted for its high ground, clean air and surrounding forest, with estate agents calling it “Scotland in Sussex”. The population nearly tripled between 1881 and 1911, and a writer in 1903 noted that houses in their own grounds were more common than cottages. Many of those large villas still stand, often with tall timber or replacement windows, bays and plenty of external joints for mastic to fail on.
Later building added family houses, flats and newer estates. Homes near Farningham Road and Osborne Road were built on the site of the old Crowborough Brickworks, which closed in 1980, and The Nightingales to the south is a newer development. In older homes we often find bathrooms refitted several times with layers of sealant; in newer ones, builder sealant that has cracked as the house settled.
Large detached houses also tend to have long runs of guttering, fascias and roof-line joints, which take a battering at this height. Our gutter and fascia sealing page explains what we can reseal from the outside.
Weather on the Forest Ridge
Crowborough sits high on the Forest Ridge, and homes on the higher, open roads catch more wind and driven rain than towns in the valleys below. Window and door mastic on exposed elevations works hard, and once it shrinks or lifts, rain can be pushed straight into the gap. We use flexible, weatherproof sealants outside and backing rod in deeper joints so the seal can move with the frame. Our window mastic guide covers the signs that it’s time for new mastic.
Shops, schools, care settings and rental homes
Crowborough is the second largest inland town in East Sussex, with a busy high street, the Farningham Road industrial estate and Beacon Academy among its larger sites. Shops, cafés, offices and school buildings all need sealant around washrooms, kitchens and glazing, and we can plan work around opening times or school holidays.
Crowborough War Memorial Hospital on Southview Road is a small NHS hospital, and care homes and clinics in the area need hygienic seals that are easy to keep clean. We also work with landlords and letting agents on resealing between tenancies; see our landlord sealant page for how that works.
From first call to finished joint
- Call or email. Tell us what needs doing, where it is and anything about access. Photos by email help.
- Get a clear quote. We give you a clear price before any work starts, and agree a date with you.
- Strip back the old joint. Every bit of old sealant is removed and the joint is cleaned, treated for mould and dried.
- Neat new sealant. Each joint gets the sealant that suits it, laid and smoothed to a tidy finish.
- Leave it to cure. We tell you how long to leave it before use, and the work carries our one-year guarantee.
Our services in Crowborough
- Bathroom & kitchen resealing: Bathroom and kitchen joints taken back to a clean, dry surface and finished with fresh anti-fungal silicone that won’t lift.
- Window & door mastic: Cracked or shrunken mastic around window and door frames, sills and patio doors replaced with a weatherproof sealant.
- Commercial & hotel sealant: Hotels, offices, washrooms and welfare areas resealed room by room, with out-of-hours working possible to arrange.
- Remedial sealant & repairs: Leaks and lifting beads from earlier sealant jobs put right, starting with finding out why they failed.
- Fire-rated sealant: Fire-rated sealant for service penetrations and frame gaps where it has been specified, applied to the tested details.
- External & façade joints: Outside movement joints given new backing rod and a flexible, weatherproof sealant in a colour to match the wall.
- New-build mastic & snagging: Failed builder sealant in new homes put right, and plot mastic for developers.
- Floor & skirting joints: Skirting-to-floor gaps, tiled floor movement joints and concrete floor joints sealed with the right product.
- Regrouting: Crumbling grout in showers and wet areas raked out and refilled, so water stays out of the wall behind.
- Glazing & conservatory sealant: Conservatory, rooflight, glass panel and shower screen joints resealed with glazing silicone.
- Gutter, fascia & soffit sealing: Gutter unions, outlets and fascia joints that leak in heavy rain cleaned and resealed.
- Sand mastic for sash & case windows: Traditional burnt sand mastic renewed around sash and case windows and doors in stone and brick.
Why choose Mr Mastic in Crowborough
A good seal comes down to preparation and the right product, and that’s where we put our effort. Mr Mastic is fully insured, has over 20 years in the trade and is an ARBOMaster approved applicator working with Arbo and Everbuild sealants. We’ve completed more than 2,847 projects and hold a 4.9-star Google rating from over 180 five-star reviews. Before we start in your Crowborough home you’ll have a clear quote, and once we finish the work is backed by a one-year guarantee.
Around Crowborough
The nearest station to the town centre is Crowborough station. Closer in, we work on homes, rented flats and businesses near St Marys Catholic Primary School, Beacon Academy, The Parish Church of All Saints and The Crowborough Cross pub. Green spaces within reach include Crowborough Country Park.
What customers say
Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.
“1950s terrace on Crossways — bath had black mould coming back constantly. Mr Mastic stripped it all back and did it properly. Bathroom looks brand new.”
“New build in Forge Wood — shower seal had failed after 16 months. Mr Mastic came out quickly, removed everything and did it properly. Perfect finish and no more leaks.”
“Harper Drive in Maidenbower — kitchen worktop had been leaking behind for a while. Came out the next day, sorted it properly. Really tidy job.”
Where we work in Crowborough
Pick your area for local details, or call 07833 053749 or email us with your postcode.
Also near Crowborough
Your questions about mastic work in Crowborough
Is Crowborough too far out for you?
No. We’re based in Crawley and Crowborough is a regular part of our East Sussex area, including Jarvis Brook and the villages nearby.
The mastic on our west-facing windows keeps failing. Why?
Exposed elevations on high ground take more wind and rain, so stiff or shrunken mastic lets water in. We replace it with a flexible, weatherproof sealant.
Can you work on a large Victorian house with original features?
Yes. We use sealants that suit timber, brick and render, including paintable options where frames need to match.
Do you seal around gutters and fascias?
Yes. We reseal accessible gutter joints and fascia junctions that have started to leak or let water behind the boards.
Can you reseal bathrooms in a rented flat between tenants?
Yes. We work with landlords and letting agents and can fit around move-out and move-in dates.
How long will new bathroom sealant last?
With good preparation and care, sanitary silicone usually lasts for years. We’ll give you simple care tips before we leave.