When it comes to designing a commercial washroom, whether it’s for a high-end office building, a hotel, or a public space, the details matter. From selecting the right materials to ensuring proper compliance with regulations, washroom design involves a complex set of considerations. Added to that are numerous abbreviations and acronyms that can add even more confusion to the process and can impact the functionality, aesthetic, and accessibility of your washroom design.
Here, we break down the essential terms and acronyms you need to know when planning your next washroom project. Whether you’re a designer, architect, or facilities manager, this glossary will help you navigate the world of washroom specifications with confidence.
1. SGL – Solid Grade Laminate
One of the most common materials used in modern washroom cubicles is Solid Grade Laminate (SGL). But what exactly does it mean?
SGL is a 13mm thick, self-supporting laminate made entirely of resin-impregnated layers. While the laminate face is the same as HPL, the core is completely solid and waterproof, making it ideal for high-traffic, high-moisture environments such as:
- Public washrooms
- Leisure centres
- Educational facilities
- Changing rooms and showers
Because SGL is a solid core material, it offers superior resistance to moisture, impact, and heavy use, making it the best choice for demanding environments. While SGL provides exceptional durability, its thinner 13mm profile may not offer the same aesthetic appeal as thicker HPL panels
2. HPL – High-Pressure Laminate
High-Pressure Laminate (HPL) is another material commonly used in washroom design. It consists of multiple layers bonded together under high pressure to create a tough, resilient surface. HPL is often used in dry spaces and light to medium use washrooms, making it ideal for use in the commercial sector.
At Dunhams Washrooms, our HPL specification consists of a 0.8mm decorative laminate bonded to a moisture-resistant substrate, typically 18mm thick. The edges are finished with 2mm ABS lipping, ensuring durability and a clean appearance.
While HPL is robust and impact-resistant, it is not completely waterproof. This makes it best suited for low to medium-use areas, where moisture exposure is minimal but a high-quality, durable finish is still required.
One key advantage of HPL is its thicker core, which provides a more premium aesthetic compared to 13mm SGL, which can sometimes appear more ‘utility’ or industrial. However, HPL is not recommended for showers or high-traffic, high-abuse environments, as moisture can eventually affect the core material over time.
3. LRV – Light Reflectance Value
If you’ve ever stood in a washroom and wondered why the cubicle doors are a different colour to the pilasters (link to below), it’s not just down to style, you’ve experienced the importance of Light Reflectance Value (LRV). LRV is a measurement used to describe the amount of light a surface reflects, ranging from 0 (black) to 100 (white).
One of the primary reasons to consider LRV in washroom design is accessibility, particularly for individuals with visual impairments. Contrast between surfaces, determined by their respective LRVs, helps users distinguish between objects, such as the sink and the wall, the toilet and the floor and even the door of the cubicle and the cubicle pilasters (link to below). Many building regulations and accessibility standards in the UK, recommend a minimum contrast level to ensure spaces are inclusive. (for more info link to LRV article)
4. IPS (Integrated Plumbing Systems) Duct Panel Systems
IPS (Integrated Plumbing Systems) Duct Panel Systems are an essential component in the design of modern commercial washrooms, offering a neat, organised, and efficient way to house plumbing within a washroom. These systems are used to conceal and protect plumbing pipes, wiring, and other mechanical components, ensuring that the washroom remains visually appealing while maintaining full functionality. IPS Duct Panel Systems are commonly used in both new constructions and refurbishments, providing a solution that meets both aesthetic and practical needs.
5. Nuance Wall Panelling
Nuance Wall Panelling is a versatile and practical option for washrooms, offering a stylish and low-maintenance alternative that can be installed on top of existing tiling or in place of. These panels are made from SGL making them waterproof and hygienic. Nuance provides a seamless finish that eliminates grout lines and reduces the potential for mould or bacteria.
6. Wash Trough
A Wash Trough is a long, continuous basin used for handwashing, typically found in high-traffic areas or commercial washrooms. Unlike individual sinks, a wash trough is designed for multiple users to wash their hands at once, making it perfect for settings like schools, airports, or stadiums where a large number of people need access to wash facilities.
7. Pilaster
A Pilaster refers to the vertical support column or panel used in washroom cubicle systems. Pilasters are essential for supporting and stabilising the structure of the cubicle, especially in designs that don’t rely on floor-mounted supports.
8. Flash Gap Panels
In modern washroom design, flash gap panels ensure both the aesthetic appeal and practicality of a washroom cubicle system. They are a type of panelling system that feature small gaps or seams between the individual panels. These panels are installed at the top of the cubicle partitions, filling the small gap between the ceiling and the cubicle itself. Flash gap panels are designed to fill the gap and prevent dust, debris, and water from entering the gap, maintaining cleanliness and a sleek, uniform appearance.
9. Shadow Panels
In washroom design, shadow panels are a stylish and functional addition that enhances both the aesthetic and structural integrity of the space. Shadow panels are typically narrow, decorative strips that are installed along the edges or at the joints of cubicles and partitions. They create a subtle “shadow” effect by adding a recessed space between the cubicle panels and the surrounding structure, giving the washroom a sleek and modern appearance.
10. Keku Lift-Off Clips
Keku Lift-Off Clips are designed to provide a secure, yet easily removable, connection between cubicle panels, making them an essential component for creating robust, flexible, and efficient washroom systems.
The Keku system uses a clip mechanism that allows cubicle panels to be securely fixed in place while also offering the ability to remove or adjust the panels without the need for extensive tools or dismantling.
Please visit our Product Page for more information about the range of products we have on offer. You can also complete a contact form and one of our trusted team will be happy to discuss any ideas or queries you have.
