Installing a new bathroom is one of the most exciting home improvement projects — but what exactly does a full bathroom installation include? The answer: much more than simply swapping a bath or toilet.
A complete bathroom installation covers planning, plumbing, electrics, waterproofing, tiling, and finishing touches, all carefully coordinated to transform your space into a stylish, functional retreat.
At Bathroom Fitters Renfrewshire, we specialise in delivering high-quality bathroom installations throughout Renfrewshire, Glasgow, and surrounding areas. In this in-depth guide, we’ll walk you through every stage of the process so you’ll know what to expect, how long it takes, and what’s involved in creating your dream bathroom.
Planning and Design Consultation
Every successful bathroom installation starts with thoughtful planning and professional design. This initial stage is where ideas become practical, tailored plans.
During the design consultation, we cover:
- Layout and Features:
Deciding on the best layout to suit your space and lifestyle. Whether it’s a walk-in shower, a freestanding bath, or a double vanity, we’ll help you design a layout that maximises functionality and comfort. - Style and Fixtures:
Choosing your preferred look — from modern minimalism to timeless classic — and selecting fittings, fixtures, and finishes that complement your home. Our design team helps you pick everything from tiles, wall panels, flooring, and lighting to taps, mirrors, and accessories. - Budget and Timeline:
Establishing a clear budget ensures there are no surprises later. We’ll advise where to invest (for example, in quality fixtures and waterproofing) to ensure durability and long-term value. A standard full bathroom installation usually takes 1–2 weeks, though larger projects can take up to 3–4 weeks depending on complexity.
At Bathroom Fitters Renfrewshire, we also offer 3D design previews, so you can visualise exactly how your finished bathroom will look before work begins.
Removal of the Old Bathroom (Demolition and Preparation)
Once your design and materials are finalised, we move on to the removal and preparation stage — often referred to as the “strip out.”
This step sets the foundation for a flawless finish and includes:
- Safely Disconnecting Utilities:
Water supply and electrics are isolated by certified professionals to ensure a safe working environment. - Removing Old Fixtures:
All old components — such as toilets, sinks, showers, baths, and radiators — are removed. We also strip out old tiles, flooring, and any damaged plasterwork. - Waste Disposal:
Our team disposes of debris responsibly and keeps the workspace tidy. You won’t have to worry about skip hire or waste removal. - Inspecting the Structure:
With the old bathroom stripped back, we inspect walls, floors, and joists for hidden damage, leaks, or mould — common in older Scottish homes. Any repairs are completed now to ensure a stable base for your new bathroom.
Tip: If this is your only bathroom, plan ahead for temporary arrangements. Our team can often help maintain limited access or schedule the project to minimise disruption.
Plumbing and Electrical First Fix
This stage is often unseen once complete but is crucial for long-term reliability. It’s where your bathroom’s new infrastructure is set up.
Plumbing:
- Rerouting or upgrading water supply and waste pipes.
- Installing new feeds for baths, showers, sinks, and toilets.
- Replacing old pipework (especially lead or iron pipes in older homes) with modern, efficient materials.
Electrics:
- Wiring for lighting, extractor fans, heated towel rails, and underfloor heating.
- Installing power for mirrors, shaver sockets, or digital controls.
- Ensuring full compliance with UK bathroom electrical safety regulations (BS 7671).
Carpentry and Support Frames:
- Fitting wall frames or supports for wall-hung toilets, basins, or cabinetry.
- Boxing in pipes or creating niches and storage shelves.
At this stage, the skeleton of your new bathroom is complete — all services are in place, ready for the next steps.
Waterproofing and Surface Preparation
Bathrooms are high-moisture areas, making waterproofing one of the most critical parts of any installation.
Our process includes:
- Tanking and Membranes: Applying waterproof membranes to shower areas, floors, and walls exposed to water. This prevents leaks and protects structural timbers from dampness.
- Wall Preparation: Installing new moisture-resistant plasterboard or cement backer boards ready for tiling or wall panels.
- Floor Preparation: Reinforcing subfloors, adding cement board, or levelling compound to create a smooth, solid base.
- Underfloor Heating (Optional): Installing electric or water-based underfloor heating systems for added comfort.
Bathroom Fitters Renfrewshire follows Scottish Building Standards for all waterproofing work — a vital step for long-term durability.
Installing New Fixtures and Fittings
This is the exciting stage where your new bathroom starts to take shape.
What’s included:
- Bath or Shower Installation: Fitting your chosen bath, shower tray, or walk-in enclosure. Wet rooms are sealed and prepared with precision drainage systems.
- Toilet Installation: Installing and connecting your toilet to the waste outlet and water supply. Wall-hung systems are fitted securely to concealed frames.
- Sink and Vanity Units: Installing basins, vanities, and any custom furniture. All taps, wastes, and overflows are connected and tested.
- Accessories: Heated towel rails, mirrors, and lighting fixtures are positioned and wired.
Our experienced team ensures every fixture is perfectly aligned, sealed, and tested for performance.
Tiling, Wall Panels, and Flooring
The finishes are where the bathroom’s personality really shines.
- Wall Finishes: Depending on your choice, we install ceramic tiles, porcelain tiles, or waterproof wall panels. Tiles are set with precise cuts and clean grout lines, while panels offer a seamless, modern finish with minimal maintenance.
- Flooring: Options include porcelain tiles, LVT (Luxury Vinyl Tile), or waterproof laminate flooring. Each is chosen for durability, safety, and easy cleaning.
- Grouting and Sealing: All joints and edges are sealed with silicone to ensure watertight protection.
This stage transforms your bathroom from a construction site into a stunning finished space.
Finishing Touches and Decoration
The final stage is all about refinement and attention to detail — ensuring everything looks perfect and performs flawlessly.
This includes:
- Painting: Using moisture-resistant paint for untiled wall or ceiling areas.
- Installing Accessories: Mirrors, shelving, toilet roll holders, towel hooks, and other finishing details.
- Final Connections: Plumbers and electricians complete their “second fix,” connecting taps, testing electrics, and ensuring everything runs smoothly.
- Deep Clean and Handover: The space is cleaned and polished, ready for use. We provide any care instructions and warranty details.
At Bathroom Fitters Renfrewshire, we take great pride in leaving every home spotless — so the only thing left for you to do is enjoy your brand-new bathroom.
Typical Installation Timeline
A standard full bathroom installation generally follows this timeline:
| Stage | Duration | Key Tasks |
| Days 1–2 | Demolition & Preparation | Remove old bathroom, inspect and repair structure |
| Days 3–5 | First Fix | Install plumbing, electrics, and framework |
| Days 6–8 | Waterproofing & Fixtures | Fit bath/shower, prep walls and floors |
| Days 9–12 | Tiling & Flooring | Lay tiles or wall panels, grout, and seal |
| Days 13–15 | Finishing & Testing | Paint, connect fixtures, final clean and handover |
This can vary depending on the bathroom’s size, condition, and design complexity.
Tips for a Smooth Bathroom Installation
- Finalise design and product choices early to prevent delays.
- Communicate regularly with your installers.
- Protect nearby rooms from dust during demolition.
- Make arrangements if you only have one bathroom.
- Always hire qualified professionals for plumbing and electrics.
Why Choose Bathroom Fitters Renfrewshire
We’re a local, family-run business dedicated to providing high-quality bathroom installations across Renfrewshire and Glasgow.
Here’s what sets us apart:
✅ End-to-End Service: From design consultation to final polish, everything handled by one reliable team.
✅ Certified Tradespeople: Fully qualified plumbers, electricians, tilers, and joiners.
✅ 3D Bathroom Design: Visualise your space before work starts.
✅ Exceptional Workmanship: Precision installation and immaculate finishes.
✅ Reliable and Punctual: We deliver on time, every time.
✅ Tidy and Respectful: We treat your home as if it were our own.
✅ Flexible Finance Options: Spread the cost of your new bathroom easily.
Whether you want a modern spa-inspired retreat or a compact, practical space, we’ll bring your vision to life — smoothly, professionally, and with guaranteed quality.
Conclusion – Transform Your Bathroom with Confidence
A complete bathroom installation includes every stage of the process — from planning and demolition to plumbing, electrics, tiling, and final decoration. It’s a detailed project requiring precision and coordination between multiple trades.
With Bathroom Fitters Renfrewshire, you don’t have to worry about managing separate contractors. Our experienced team handles everything under one roof, ensuring seamless communication, outstanding quality, and a flawless finish.
Ready to transform your home? Contact Bathroom Fitters Renfrewshire today to book your free design consultation and start planning your dream bathroom with a trusted local team.