Fully tanked wet room installation — the entire floor is waterproofed and drained, creating a seamless, open shower space. Serving Thornbury and surrounding areas.
Without the containment of a shower enclosure, moisture spreads further in a wet room. Thornbury bathrooms need adequate extraction — typically a 100mm fan on a humidity sensor, vented externally.
Wet rooms need a sloped floor to the drain. In Thornbury timber-floor properties, this means installing a gradient former on top of the joists — it's specialist work, not a general tiling job.
Don't let these problems get worse. Get your free quote today.
✓
Free Quotes
✓
Fully Insured
✓
Clean & Tidy
✓
Workmanship Guarantee
The technical demands of a wet room in Thornbury are significantly higher than a standard shower installation. Every junction between floor and wall needs a reinforced membrane joint. The drain must sit at the room's lowest point with consistent fall from all directions. And the tiling must use anti-slip rated tiles that still look and feel good underfoot.
We've installed wet rooms in Victorian terraces, modern apartments, loft conversions, and ground-floor extensions across South Gloucestershire. Each Thornbury property brings different challenges — timber vs concrete floors, room shape, ceiling height — but the waterproofing principles are always the same: two-coat membrane, taped joints, and a properly formed gradient.
Thornbury's attractive market town setting and mix of property styles create consistent demand for professional bathroom design and installation services.
Thornbury features a medieval castle and high street, Georgian and Victorian town properties, and substantial modern housing estates.
Newer Thornbury estate properties often have builder-grade plastic baths and thin stud walls that need upgrading during bathroom renovation.
Thornbury features predominantly 1960s-80s housing estates, newer build developments from the 2000s onwards, and some traditional stone-built town centre properties. being close to the Bristol Channel, South Gloucestershire gets milder winters but windy conditions. Good external ventilation for bathrooms is important.
Heating a wet room in Thornbury is more important than in a standard bathroom because the entire floor gets wet. Underfloor heating dries the floor faster, prevents the cold, damp feeling that wet rooms can have, and reduces the risk of mould. We include UFH as a standard recommendation in all our wet room installations.
Wet room construction in South Gloucestershire timber-framed properties requires specific floor treatment. In Thornbury homes with joisted floors, we install marine-grade plywood over the joists, then pre-formed gradient boards to create the drainage fall. This structural approach prevents the flexing that cracks membrane joints and causes leaks.
If your Thornbury wet room is above another room, insist on a secondary membrane beneath the structural floor as well as the primary tanking on top. Belt-and-braces waterproofing is the only sensible approach when there's a living space below.
Regular squeegee use after showering extends the life of your South Gloucestershire wet room and prevents soap scum buildup on tiles. We provide a stainless steel squeegee with every Thornbury wet room installation — it takes 30 seconds and makes a real difference.
Wet room doors should open outward or be sliding — an inward-opening door can be blocked by water pooling behind it, and the constant water contact deteriorates the door bottom faster.
Wet Room jobs in Thornbury are scheduled around the realities below — postcode coverage, nearest roads, councils involved, and the named places we travel to from there.
South Gloucestershire Council — covering BS, GL postcode districts.
We reach Thornbury via M4, M5, M48 — and serve sites within roughly 25 miles of here.
Aztec West · Severnside
South Gloucestershire is reached via the M5 J14, typically 35 minutes from our base.
A small sample of South Gloucestershire work. Every job here was managed by the same team that would handle your Thornbury project.



When you book wet room with us in Thornbury, the first step is always a home visit. We need to see the space, check the existing plumbing and drainage, assess the wall and floor construction, and understand how you use the room. This visit typically takes 30-45 minutes and is completely free. We'll discuss your ideas, point out any potential issues, and answer your questions honestly.
We take waste management seriously on every South Gloucestershire project. During wet room in Thornbury, old fixtures, tiles, and packaging are removed from your property regularly — not piled up in your garden for weeks. We use licensed waste carriers and recycle materials wherever possible.
Skipping the waterproofing step entirely. We've seen Thornbury showers where tiles were stuck directly to plasterboard with no membrane — the board was rotten within two years.
Choosing a rainfall shower head without checking water pressure. In many Thornbury homes, the flow rate simply can't support a large-diameter head — the result is a disappointing trickle instead of a downpour.
Fitting an electric shower on an inadequate circuit. Electric showers in Thornbury need a dedicated circuit from the consumer unit with the correct cable size — piggy-backing off an existing circuit is dangerous and illegal.
Having worked on hundreds of South Gloucestershire properties, our approach to wet room in Thornbury is informed by real-world experience with local building styles. We schedule wet room projects in Thornbury to minimise disruption — agreeing working hours, access arrangements, and key milestone dates before we start. We photograph key stages of every South Gloucestershire installation — waterproofing, pipe routes, electrical connections — so Thornbury homeowners have a permanent record of what's behind their walls should future work be needed. As a South Gloucestershire-based team, we're personally invested in the quality of our wet room work in Thornbury — our reputation in the local community depends on every project we complete.
Thornbury residents trust us for wet room because we deliver consistently high standards on every project, regardless of size. Communication is central to how we work in South Gloucestershire. Thornbury clients receive regular progress updates, and any unexpected findings are discussed with you before any additional costs are incurred. We test every connection, seal, and fitting before completing any wet room in Thornbury — water pressure testing, leak checks, and drainage flow tests are non-negotiable parts of our process. Thornbury homeowners looking for reliable wet room can call us for a no-pressure conversation about their project — we're happy to advise even if you're not ready to commit.
We recommend Thornbury homeowners invest in the shower valve rather than the shower head. A quality thermostatic valve from a manufacturer like Aqualisa, Mira, or Bristan will perform reliably for 15+ years, while heads and hoses are inexpensive to replace.
Check floor structure, joist direction, and capacity for wet room conversion.
Install a precisely sloped former and linear or point drain in the floor.
Apply liquid or sheet membrane waterproofing to the entire floor and wet area walls.
Anti-slip floor tiles, wall tiles, glass screen, and shower fixtures installed.
To discuss your wet room project in Thornbury, call us on 07927 593585 or request a free quote.
Yes, but the floor needs reinforcing and a proper gradient former. We do this regularly in Thornbury period properties. The key is getting the substrate right before any tiling.
No — the floor slopes gently towards the drain so water drains away within minutes. We also position a glass panel to contain most splash. The rest of the floor stays dry in normal use.
Typically £1,500-£2,500 more than a standard shower installation in Thornbury, mainly due to the tanking and gradient work. But you save on the cost of a shower tray and enclosure.
Tell us about your project and we'll get back to you within 24 hours.
We also offer these services in Thornbury and surrounding areas.
We also provide wet room in these nearby areas:
Hand-written background reading and pricing for this exact combination — not auto-generated filler.
Contact Cotswold Maintenance Group today for a free, no-obligation quote. We'll get back to you within 24 hours.
Our diary fills 3–4 weeks ahead in peak season. Get on the list now and we'll confirm a site-visit window inside one working day.
If you've read this far, you probably want a quote rather than more marketing. Send your address and rough scope — we drive over from South Gloucestershire via M4, look at the room, and price it line by line.