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Our Process

The Base Foundations  

At Crown Rooms, we offer a sustainable and reliable foundation option for our garden rooms using ground screws.
While ground screws are our preferred choice for their eco-friendliness and stability, 
we also offer garden room construction on concrete foundations for those who prefer it.
Our team is experienced in both options and committed to providing a high-quality and customized solution for every customer.

ground screws

The Base Frame


Crown Rooms exclusively uses high-quality 6 x 2 treated timber for our garden room framing,
chosen for its strength, durability, and C24 grade load-bearing capabilities. 
The timber is pressure treated to resist fungal and insect attack, providing a long-lasting and sturdy frame for your garden room. 
This ensures a stable and solid foundation for your garden room floor, with no bounce.

Garden room floor frame

Floor Insulation


Crown Rooms uses 100mm celotex, which is the most efficient thermal insulation available, to keep the cold outside and the heat inside your garden room. Our high-quality insulation is designed to regulate the temperature of your garden room, providing optimal comfort year-round. With Crown Rooms, you can be sure that your garden room will be energy-efficient and built to the highest standards. We also use 18mm OSB on top to create a super solid platform and a smooth and level surface for finishing touches such as flooring.

Garden room floor frame
Garden room floor insulation


At Crown Rooms, we construct the walls of our garden rooms using 4x2 CLS and 11mm OSB . To ensure that your garden room is as solid as possible, we follow a three-step process for the exterior walls.

First, we wrap the outside walls with 11mm OSB, which provides a layer of strength and stability to the structure. Next, we cover the OSB with a breather membrane that prevents any water from getting past and keeps the insulation dry. Finally, we install the last layer of cedar cladding to provide an attractive finish to the exterior of your garden room.

This three-step process ensures that your garden room walls are robust, weather-resistant, and aesthetically pleasing. Our use of high-quality materials and attention to detail in the construction process means that you can enjoy your garden room for years to come, even in harsh weather conditions.

Garden room walls
Garden room construction

Inside Walls

At Crown Rooms, we utilize 50mm celotex insulation for its excellent thermal efficiency. Once the insulation installation is completed, our electrician proceeds with the first fix wiring. After the wiring is in place, the walls are covered with plasterboard and finished with a skim coat before being painted. This process results in a well-insulated and aesthetically pleasing interior space.

garden room walls plaster
garden room walls insulation

Ceiling and Roof

At Crown Rooms, we prioritize efficient insulation and protection against the elements. Therefore, we utilize 100mm celotex insulation in the ceiling for superior thermal performance. For the roof, we construct it using 6x2 c24 timber, which is then covered with 18mm OSB to provide a solid base. To ensure long-lasting protection against water damage, we apply a single piece of EPDM rubber membrane over the entire roof surface. This process guarantees that no water will penetrate the roof for the next 25 years. At Crown Rooms, we are committed to providing high-quality construction and materials for our customers' peace of mind.

garden room roof epdm membrane
garden room roof timber

 Soffits and Fascias

At Crown Rooms, we believe that attention to detail is essential in constructing high-quality garden rooms. Therefore, we only use the best quality soffit and fascia boards to ensure the durability and longevity of our structures. Our commitment to using premium materials means that our garden rooms stand out for their quality and aesthetic appeal. We take pride in our workmanship and use only the finest materials to create garden rooms that are both beautiful and built to last.

garden room soffit
garden room soffit

Doors and Windows

At Crown Rooms, we understand the importance of selecting the right doors and windows to complement the overall design and functionality of a garden room. That's why we only work with the best manufacturers in the industry to ensure that our garden rooms meet the highest standards of quality and performance. We offer a wide range of doors and windows, including aluminium or uPVC materials, as well as bi-fold, French, or sliding doors in any colour to meet our customers' needs. Our commitment to using high-quality materials and partnering with top manufacturers means that our garden rooms not only look stunning but also function flawlessly. With Crown Rooms, you can trust that your garden room will exceed your expectations in every way.

Grey glass door
black aluminium sliding door
grey pvc sliding door

Interior Finishes 

At Crown Rooms, we are dedicated to providing exceptional interior finishes for our garden rooms. We ensure that our walls and ceilings are painted to the highest standards, with a smooth and flawless finish. We take great care in selecting the best quality flooring, sockets, and lighting fixtures to match the other high-quality materials used in our garden rooms. By using top-of-the-line materials and expert craftsmanship, we create a seamless and cohesive look that is both beautiful and functional. Our attention to detail ensures that our garden rooms not only meet but exceed our customers' expectations. At Crown Rooms, we are committed to delivering garden rooms that are not only aesthetically pleasing but also practical and comfortable

interior garden room
garden room inside
garden room, Bespoke garden gym


All of our garden rooms are equipped with efficient heating systems to ensure your comfort during colder months. We utilize state-of-the-art electric smart glass radiators that can be easily controlled through your smartphone. These radiators are not only energy-efficient but also aesthetically pleasing, seamlessly blending into the design of your garden room. With the ability to adjust the temperature from anywhere, you can be sure that your garden room will always be at the perfect temperature to suit your needs.

garden room smart glass radiator

Exterior Lights

At Crown Rooms, we take pride in providing comprehensive features for our garden rooms to enhance your outdoor experience. That's why we offer outdoor lighting as a standard feature in all our garden rooms. The lighting is strategically placed on the soffit board and walls to provide ample illumination while also adding a touch of elegance to the structure. Our outdoor lighting is designed with convenience in mind, as it can be controlled wirelessly by a switch that you can keep in your home. This means you can easily turn the lights on or off without having to leave the comfort of your home. So whether you want to create a warm and inviting atmosphere or simply need to navigate around your garden room at night, our outdoor lighting has got you covered.

gardan room outside light

Get in touch with us to start your Beautiful Garden Room

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