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PREMIUM models are available in sizes offered or custom sizes. They are manufactured using the thickest wall of 70mm (2-3/4").  Premium models are offered without floors, ready to mount on a concrete slab or wood sub floor. (soft wood tongue & groove floors are available on request) The windows are premium grade, double glazed, double weather-stripped with heavy duty multi locking tilt and turn openers. Doors have double glazed glass and include mortised locks, deadbolts with keys. Multi room models include interior walls with solid core wood interior doors, hardware and keys. Threaded steel rods are included for wall junctions to secure walls.

Premium models can be insulated on the interior or exterior depending on the model. Single 2-3/4" walls have a thermal mass rating of R-12 ideal for 3 season use. To meet residential building codes use upgrade insulating kits for 10% of the selling price.

Thermal mass of R-12 + R-15 insulation = R-27 minimum

Chehalis is 1 room model with a divisional partition that has a large opening. It has a vaulted ceiling and the tall front windows and double wide door with full glass provide plenty of light for the interior.  Insulate the roof and a wall mounted HVAC heating/cooling system and this becomes a comfortable extended living space ideal for an office, sewing or games room.

The model can be assembled in 2 days by 2 people.

Kit includes:
  • Without floor ready to mount on slab or wood sub floor
  • (70mm) 2-3/4" Pre-cut Numbered Exterior walls
  • (70mm) 2-3/4" Pre-cut Numbered Interior walls
  • Vaulted Ceilings
  • Roof Purlins
  • Tongue & Groove Ceiling/Roof Boards
  • Fascia Trim
  • PREMIUM Double Glazed Windows
  • Entry Doors c/w Locks, Deadbolts, Keys
  • Window & Door Trim
  • Threaded Steel Storm Rods at Junctions