SIP panel shell structure – fast, strong and highly insulated
What Is a SIP Garden Room Kit?
A SIP garden room kit is a fast and efficient way to build a fully insulated outdoor room using Structural Insulated Panels. These panels combine strength and insulation into one system, allowing you to construct a solid, airtight building much quicker than traditional methods.
At Sips & Splines, our kits are designed for simple DIY installation, meaning you can build a high-quality garden room without specialist construction experience.
What Is a SIP Panel?
SIP stands for Structural Insulated Panel. Each panel is made from two structural boards bonded to a rigid insulation core. This creates a panel that is both strong and highly energy efficient.
Instead of building a frame and then adding insulation separately, SIP panels combine everything into one product, reducing build time and improving performance.
How Does a SIP Garden Room Kit Work?
Your kit is delivered as a set of pre-cut panels that fit together to form the floor, walls and roof. Each panel is designed to connect using structural splines and fixings.
- Panels arrive pre-cut to size
- Walls slot together using splines
- Roof panels install on top
- Creates a rigid, airtight shell
How Easy Is It To Install?
SIP garden room kits are designed for straightforward installation. With two people and basic tools, most kits can be assembled in a short timeframe.
- No complex cutting required
- Panels are pre-sized and ready to install
- Clear panel layout system
- Minimal specialist tools needed
This makes SIP kits one of the fastest ways to build a garden room shell.
What’s Included
- Pre-cut SIP wall panels
- Pre-cut SIP roof panels
- Pre-cut SIP floor panels
- Structural splines and timber components
- Fixings pack
What’s Not Included
- External cladding
- Roof finish (EPDM optional)
- Doors and windows
- Base or foundations
- Internal finishes and electrics
Why Choose SIP Instead of Timber Frame?
- Better insulation performance
- Faster build time
- Stronger overall structure
- Less risk of gaps and thermal bridging
- Cleaner, more precise construction
What Can You Use a SIP Garden Room For?
- Home office
- Garden studio
- Gym or fitness space
- Hobby room
- Entertainment space
Ready to Choose Your SIP Garden Room Kit?
Browse our range of standard sizes or request a custom quote based on your exact requirements.