West Sussex · England
Mastic man in Horsham
Bathroom, kitchen and window resealing across Horsham, from Causeway cottages and Victorian terraces to the new homes at Highwood and Kilnwood Vale.
- Fully insured
- Arbo and Everbuild sealants
- Clear quote before we start
Resealing and mastic work across Horsham
Horsham is one of our nearest towns: Mr Mastic is based just across the district in Crawley, so a visit to Horsham is a short drive rather than a day out. We cover the town centre, the surrounding villages and the big new neighbourhoods on its edge, resealing baths, showers and basins, renewing kitchen worktop joints and replacing mastic around windows and doors.
Kitchens are often overlooked. The joint between worktop and upstand takes splashes every day, and when it fails, water seeps under the edge of a laminate or timber top and swells it. We remove the old bead, clean and degrease the joint and reseal with a suitable silicone, using a food-safe product beside the sink. Our kitchen resealing page explains more.
Old market town at the centre, new estates at the edges
Horsham’s historic core is a conservation area. Around the Causeway and Carfax, the council’s appraisal describes timber-framed buildings, some hidden behind plaster or tile hanging, steep roofs of Horsham Stone slabs, Georgian refronting and traditional timber sash and casement windows. After the railway arrived in 1848, Victorian terraces and villas followed, including those on Denne Road. In old houses like these, walls are rarely straight, and the gap behind a bath or along a worktop can vary along its length, so we fill and tool each section to suit.
Then there’s the new Horsham. Highwood Village, built by Berkeley Homes off the A24, is planned to reach around 1,100 homes, and Crest Nicholson’s Kilnwood Vale, between Horsham and Crawley, is planned for 2,500. New houses settle, timber dries out and showers are used daily, so developer sealant often splits or pulls away within the first couple of years. Before your builder’s warranty window closes, our new-build sealant snagging guide shows what to look for.
We see the same pattern in Crawley: in a Forge Wood shower, the developer’s sealant failed after 16 months and needed to be cut out and redone properly. Sorting it early stops water getting behind tiles and into the floor.
Weald weather, away from the coast
Outside, Horsham sits inland in the Sussex Weald, sheltered from the salt spray of the coast but still exposed to summer sun and winter wet. South-facing patio doors and windows bake in July, and the perimeter mastic dries, shrinks and lets go of the frame. Older brick and timber also move with the seasons, so we use flexible exterior sealants and backing rod where needed. On the newer estates, the joints between render, cladding and frames are worth checking too, as they often shrink as the building dries out.
Offices, schools and rented homes
Horsham has long been an office town, with RSA Insurance Group registered here, and plenty of smaller firms on its industrial estates and in the town centre. Staff washrooms, shower rooms and tea points all have sealant that wears out, and we can work early or out of hours by arrangement. Our commercial sealant page shows how we plan larger jobs.
Schools, including Christ’s Hospital, the boarding school just outside the town, and landlords with lets in the centre and the new estates also call on us for resealing between terms and tenancies.
What happens when you book
- 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.
- Guaranteed work. You’ll know the cure time before we leave, and every job comes with a one-year guarantee.
Jobs we take on in Horsham
- 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: Window and door mastic that has dried out in the sun replaced with a weather-resistant joint that can move with the frame.
- Commercial & hotel sealant: Guest bathrooms, staff washrooms and kitchens in commercial buildings resealed in a planned order that keeps the site running.
- Remedial sealant & repairs: Failed, botched or over-sealed joints stripped out, the cause found and the joint resealed properly.
- Fire-rated sealant: Intumescent and fire-rated joints around pipes, cables and frames, installed to the manufacturer’s tested specification.
- External & façade joints: Brickwork movement joints, render and cladding joints resealed with backing rod and flexible exterior sealant.
- New-build mastic & snagging: Failed builder sealant in new homes put right, and plot mastic for developers.
- Floor & skirting joints: Movement joints in tiled and concrete floors, and skirting gaps, sealed so they stay tidy and keep dirt out.
- Regrouting: Crumbling grout in showers and wet areas raked out and refilled, so water stays out of the wall behind.
- Glazing & conservatory sealant: Glass-to-frame joints on conservatories, rooflights and shower screens cut out and resealed.
- Gutter, fascia & soffit sealing: Leaking gutter joints, end caps, fascia and soffit joints resealed with exterior sealant.
- Sand mastic for sash & case windows: Sash and case window surrounds in stone and brick re-pointed with traditional sand mastic.
What you get with Mr Mastic in Horsham
Because Horsham is so close to our Crawley base, we can usually fit visits in quickly and come back easily if you have a question afterwards. Our applicators bring more than two decades of experience, we’re fully insured, and we’re ARBOMaster approved, working with Arbo and Everbuild products. We’ve finished 2,847+ projects and hold a 4.9-star Google rating from over 180 five-star reviews. Every quote is clear and agreed up front, and every job comes with a one-year guarantee.
Around Horsham
For trains, Horsham station is closest to the centre. Places most people will know nearby are Christs Hospital School Museum (2.4 miles south-west). Closer in, we work on homes, rented flats and businesses near Kingslea Primary School, Millais School, Bohunt Horsham and Hope Chapel. Green spaces within reach include Warnham LNR.
What customers say
Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.
“Professional mastic man service from start to finish. They assessed the work properly, gave a clear quote, and executed the job perfectly. Very satisfied with the results.”
“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.”
Where we work in Horsham
Choose your part of town for local details, or call 07833 053749 or email us and tell us your postcode.
Also near Horsham
Your questions about mastic work in Horsham
How far are you from Horsham?
Not far. We’re based in Crawley, a short drive away, so Horsham and its villages are part of our everyday area.
The shower sealant in my Highwood Village home has split. Should I worry?
It’s common in new homes as they settle. We cut out the developer’s bead, prime where needed and reseal with sanitary silicone.
Do you cover Kilnwood Vale and Broadbridge Heath?
Yes. We cover all of Horsham, including Kilnwood Vale, Broadbridge Heath and the surrounding villages.
Can you reseal around a bath in an old house with uneven walls?
Yes. We work along the joint section by section, using backing rod in wider gaps, so the bead looks even and seals properly.
Do you colour-match sealant to my tiles?
We can. Arbo and Everbuild make sanitary silicones in a range of colours, and our colour-matched resealing service picks the closest match.
Can you work in a Horsham office before staff arrive?
Out-of-hours working can be arranged for commercial jobs, so washrooms and kitchens are ready when people come in.
What should I do about worktop sealant that keeps peeling?
Have it removed completely and resealed. Laying new silicone over old won’t bond, and water will keep getting under the edge.