Frequently Asked Questions
General
Get the basic information
A SIP (Structural Insulated Panel) is a high-performance building panel used in floors, walls, and roofs. It consists of a solid insulation core sandwiched between two structural boards (usually OSB). SIPs are known for their exceptional thermal performance, structural strength, and fast installation times — making them ideal for garden rooms.
A SIP Garden Room is a highly insulated, prefabricated structure made entirely from Structural Insulated Panels. Unlike traditional timber garden buildings or summer houses, SIPs provide a year-round solution that’s warm in winter and cool in summer.
Thanks to the prefabricated nature of SIPs, most garden rooms can be assembled in just a few days. Smaller studios may even be erected in a single day, depending on size, location, and site access.
We currently deliver and install garden room kits across the West Midlands region of the UK. If you’re unsure whether your area is covered, just drop us a message with your postcode and we’ll confirm for you.
Absolutely. SIP Garden Rooms are ideal for home offices, gyms, studios, and hobby rooms. They provide excellent insulation and structural strength, making them suitable for year-round use and heavy equipment like desks, treadmills, or workbenches.
With proper installation and maintenance, a SIP Garden Room can last 50 years or more. The structural panels are durable and resistant to warping, pests, and moisture when protected by proper cladding and roofing.
Yes! We offer flexible kits that can be tailored to your desired size and layout. Whether you need extra windows, specific door placements, or a custom footprint, we can design a solution that fits your garden and requirements.
Yes, a high-quality, insulated garden room can add value to your home—especially when used as a functional extension of living space, such as a home office or studio. It’s an appealing feature for buyers looking for extra usable space without the hassle of a house extension.
Technical & Product FAQs
Enhance Your Outdoor Living Space
For 97mm thick SIPs, the maximum span is 3.66m. For 122mm thick SIPs, it increases to 4.88m. Roof and floor SIPs (610mm wide) can be joined end-to-end for spans between 2.44m and 4.88m.
2.44m x 1.22m panels: approx. 46kg
3.0m x 1.2m panels: approx. 70kg
Simply email us your delivery postcode and we’ll confirm the delivery cost for your location.
Our wall panels come pre-rebated to 50mm, and floor/roof panels to 100mm. If you cut panels on site, they can be re-rebated easily using a handsaw or a hot wire rebating tool.
No, we do not supply internal partition walls. We recommend using standard stud walls, which are more cost-effective and don’t require insulation.
No. We provide a treated timber sub-frame to sit on ground screws. For concrete bases, battens are attached underneath the SIP floor to raise the building and ensure airflow.
The panels are shower-resistant but not fully waterproof. If not being installed immediately, they must be covered with waterproof sheeting.
Yes, if you opt for our installation service, we’ll install both the breathable membrane and the battens, provided we are supplying them.
We recommend a level concrete slab, ground screws, or swift plinths.
97mm SIPs: Approx. 0.30 W/m²K
122mm SIPs: Approx. 0.22 W/m²K
For year-round use, the 122mm panels offer superior insulation.
We do not recommend rooflights, as they may compromise the structural integrity of the roof.
Our SIPs are designed for standalone garden buildings under permitted development. As they haven’t been structurally certified, they do not meet full building regulations. For compliance, we recommend consulting a structural engineer.
Yes. A breathable membrane is needed externally, and a vapour control layer is required internally to ensure moisture control.
You can run cables by drilling a hole through the SIP. Wires in contact with insulation should be sleeved in plastic pipe. Once the vapour membrane and battens are fitted, wiring can be run behind the plasterboard.
No, we do not install EPDM roofing. This should be done after the cladding is installed so the EPDM can be correctly tucked and sealed.
No, our kits do not include windows, doors, cladding, or internal finishes. You are free to choose and install your own finishes to suit your style.
Planning Permission: Required if the building is over 2.5m tall within 2m of a boundary, or over 30m² in footprint.
Building Regulations: Required for buildings over 30m² or those intended for habitable use.
We always recommend confirming requirements with your local authority, especially if you’re in a conservation area or your property is listed.
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