Why an Open Building System?
Every DIY building project starts from zero — new plans, new materials, new techniques. There is no shared standard for small structures. The Thiosphere changes that: standardized panel geometry, interchangeable modules, and one construction grammar that works for saunas, offices, greenhouses, and anything else you design.
What You Get
Everything you need to go from idea to finished structure
Construction Plans
Complete cut lists, assembly sequences, and connection details for every module in your chosen product.
Bill of Materials
Exact quantities and dimensions for every piece of lumber, fastener, and material you need to buy.
3D Configurator Access
Design your layout in our free 3D configurator. Experiment with module combinations before you cut a single board.
Builder Network
Connect with local lumber yards and builders. Share your design, get real quotes, find people who can help.
How It Works
Design
Configure your layout in the free 3D tool. Choose modules, materials, and placement.
Plan
Get your bill of materials, cut list, and assembly sequence. Order materials locally.
Build
Follow the step-by-step handbook. Standard tools, standard lumber, no special skills.
Why Thiosphere?
One Grammar, Every Structure
Standardized panel geometry means every module connects to every other module. Design once, reconfigure forever.
Hardware-Store Materials
Standard 2×4s, plywood sheets, and common fasteners. No exotic materials, no proprietary parts, no vendor lock-in.
3 Tools, Weekend Build
Circular saw, drill, measuring tape. If you can build a bookshelf, you can build any Thios structure.
Technical Specifications
| Diameter Options | 10 ft / 12 ft / 14 ft |
| Footprint | ~160 sq ft (fits a standard parking space) |
| Interior Height | 7 ft at working level, 10 ft at peak |
| Modules | 22 interchangeable (roof, wall, window, door, corner) |
| Foundation Options | Plinth, trailer, or casters (removable) |
| Build Time | 40 - 60 hours (3 - 4 weekends) |
| Materials Budget | $2,000 - $5,000 |
| License | CERN Open Hardware License v2 |
Engineering Views
Get the Complete Build System
Step-by-step handbook, cut lists, material specs, and assembly guides — plus lifetime updates and community access. From $29.
See Pricing & Editions30-day money-back guarantee · Open-source license included
Get Quotes from Local Builders
Design your configuration in our free online tool, then get material quotes from suppliers near you.
Design & Get QuotesBuilder Tools
Everything you need to build with precision — from templates to jigs.
MDF & Paper Templates
Precision CNC-cut MDF routing guides and full-scale paper patterns for accurate fabrication.
View Templates →3D-Printable Jigs
Download STL files for assembly jigs, alignment tools, and drilling guides. Print at home.
Drop-Ship Jig Kits
Professional-grade steel and aluminum jigs shipped directly to your door.
Frequently Asked Questions
Explore Other Products
OPEN SOURCE HARDWARE
The Thiosphere™ SDK, the foundation to all our products, is open source hardware. In fact, all Thios products are. Specifically the CERN Open Hardware Licence Version 2 - Strongly Reciprocal.
That's a fancy way of saying that if you want to use our design, even for commercial purposes, you have to share your changes with everyone else.