West Berkshire · England
Mastic man in Newbury
Bath, shower and window mastic work for Newbury’s market-town streets, canal-side homes, Wash Common semis and the new flats by the racecourse.
- Anti-fungal silicone as standard
- 20+ years in the trade
- Guaranteed for a year
Sealant jobs we do in Newbury
Newbury is an old market town that has kept its shape. The centre still gathers around a large market square, with listed buildings from the 17th and 18th centuries, and the Kennet and Avon Canal runs straight through the middle. Around that core are suburbs such as Wash Common, Speenhamland, West Fields and East Fields, with Speen, Shaw, Donnington and Greenham on the edges. Mr Mastic covers all of it from our base in Crawley.
We take on bathroom, kitchen, window and door sealing, and external joints on homes and commercial buildings. We never patch: the old bead is removed, the joint is cleaned and dried, and fresh sealant is laid to suit the surfaces and the movement. If you’re weighing up whether to call someone in, our guide to choosing a mastic man covers the questions to ask.
A market town with canal-side streets and growing edges
The oldest buildings are in the centre, where the medieval Cloth Hall, a half-timbered granary and St Nicolas Church stand among listed houses and shops. Older brick and timber move more than modern walls, so around their frames we choose a flexible sealant that suits the material, and a paintable one where the joint will be painted. Many of these buildings have flats over shops, with bathrooms fitted into rooms that were never designed for them.
Further out, the suburbs are mainly family houses, along with socially rented homes; in the 2011 Census, more than a third of the town’s households rented, socially or privately. Bathrooms and kitchens in these homes have often been replaced at least once, and we regularly find layers of old sealant, shrunken worktop joints and hardened uPVC window mastic.
The town is also growing. Beside the racecourse, the first new apartment blocks were completed in 2015, and more housing has been built towards Greenham. In homes this new, the sealant often cracks as the building settles in. Our shower resealing page explains how we put that right.

Canal, river and flats over shops
With the Kennet and Avon Canal running through the middle of town, quite a few Newbury homes sit close to the water. Damp air encourages mould in bathrooms and on the sealant around windows, so we use anti-fungal sanitary silicone inside and flexible, weatherproof sealant outside, with the joint fully dried before the new bead goes in.
In the town centre, many flats are above shops, reached by narrow stairs from the street, and parking is limited. We plan these jobs carefully, arrange access with landlords or managing agents and carry everything in on one trip. In flats like these, a failed shower seal can soak into the shop ceiling below, so it’s worth acting at the first sign of a gap.
Business parks, shops and the racecourse area
Vodafone has its headquarters on the edge of town and is the largest employer, and there is a mix of offices and industrial units, including the Greenham Industrial Estate to the south-east. Washrooms, kitchens and welfare facilities in all of these need resealing over time, and we can work out of hours.
The Market Place and the town centre have cafés, pubs and restaurants, and the Corn Exchange draws visitors. With a large rented sector, we also reseal for landlords and letting agents across West Berkshire.
From first call to finished joint
- Tell us about the job. A quick call or email with what needs sealing and where. Photos help us quote accurately.
- Agree the price. You get a clear quote up front, and we book a date that suits you.
- Strip back the old joint. Every bit of old sealant is removed and the joint is cleaned, treated for mould and dried.
- Lay the new bead. We apply the right product for each joint and tool it to a clean, even line.
- Guaranteed work. You’ll know the cure time before we leave, and every job comes with a one-year guarantee.
Sealant services across Newbury
- Bathroom & kitchen resealing: Baths, showers, basins, wet rooms, worktops and sinks: old sealant cut out, mould treated and a new bead of anti-fungal silicone laid.
- Window & door mastic: Cracked or shrunken mastic around window and door frames, sills and patio doors replaced with a weatherproof sealant.
- Commercial & hotel sealant: Sealant programmes for offices, hotels, care settings and schools, with early or late working where it helps.
- Remedial sealant & repairs: Messy, layered or wrong-product sealant cut out and replaced with the right sealant, laid the right way.
- 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: Expansion joints in brick, render and cladding cut out and renewed at the right depth so they can move without splitting.
- New-build mastic & snagging: New-build bathrooms, kitchens and frames resealed where the original sealant has cracked as the house settles.
- Floor & skirting joints: Gaps under skirting boards, tile movement joints and concrete floor joints sealed with a product that suits the traffic.
- Regrouting: Tired or mouldy grout raked out and renewed, and the internal corners finished in flexible silicone.
- Glazing & conservatory sealant: Glazing joints on conservatories, roof lanterns and screens renewed with a sealant suited to glass and frames.
- Gutter, fascia & soffit sealing: Leaking gutter joints, end caps, fascia and soffit joints resealed with exterior sealant.
- Sand mastic for sash & case windows: Traditional sand mastic for period windows and doors where a modern sealant would look out of place.
Choosing a mastic man in Newbury
Newbury is one of the further points of our patch from Crawley, so we plan each visit to finish the job in one go wherever we can. You’ll be dealing with a firm that has 20+ years in sealant work, full insurance and ARBOMaster approved status, using Arbo and Everbuild products. There are 2,847+ completed projects behind us, along with a 4.9-star Google rating from over 180 five-star reviews. A clear quote comes before any work, and a one-year guarantee comes after.
Getting around Newbury
The nearest station to the town centre is Newbury station. Places most people will know nearby are British Balloon Museum & Library Ltd (less than half a mile north) and Donnington Castle (1.6 miles north-west). Typical jobs near the centre are in homes and businesses around St Nicolas C.E. Junior School, St Bartholomew's School, St Bartholomew's School and St Nicolas Church. Green spaces within reach include Audrey's Meadow.
What customers say
Rated 4.9 on Google from 180+ five-star reviews. Read the reviews on Google.
“Harper Drive in Maidenbower — kitchen worktop had been leaking behind for a while. Came out the next day, sorted it properly. Really tidy job.”
“Called for a bathroom reseal and the mastic man showed up on time with all the right equipment. Brilliant attention to detail. The sealant looks perfect and they kept everything tidy.”
“We had old mastic that needed replacing throughout our kitchen and bathrooms. The mastic man professional was knowledgeable, quoted fairly, and delivered excellent quality work. Highly recommend!”
Parts of Newbury we work in
Pick your area for local details, or call 07833 053749 or email us with your postcode.
Also near Newbury
Newbury: common questions
Do you cover all of Newbury?
Yes. We cover the whole town, including Wash Common, Speenhamland, West Fields, East Fields and the town centre, plus Speen, Shaw, Donnington, Greenham and Thatcham.
Can you reseal a flat above a shop in the town centre?
Yes. We’ll arrange access with the landlord or agent and plan around parking so the job is done in one visit.
My home is near the canal and the bathroom seals go mouldy quickly. Can you help?
Yes. We remove the old sealant, treat the mould, dry the joint thoroughly and reseal with anti-fungal sanitary silicone.
I’ve bought a new apartment near the racecourse and the shower seal has cracked. Why?
New buildings settle in their first year or two, and developer sealant often can’t take the movement. We cut it out and reseal properly.
Can you seal around windows in an older listed building?
We can reseal around frames using a sealant suited to the materials. For listed buildings, it’s worth checking with the council first if you’re changing anything beyond like-for-like repair.
Do you work on industrial units in Greenham?
Yes. We reseal welfare facilities and external joints, and out-of-hours working can be arranged.
Is the work guaranteed?
Yes. Every job comes with our one-year guarantee.
