Installation Guide

BUILDING A GREENHOUSE
1. Choose a good building site, preferably: level ground with good drainage, sunny area away from
large trees, and close access to water and electric
2. Choose desired footings/flooring materials and install accordingly. Make gravel floors 3’ larger
than greenhouse footprint, make poured
concrete floors 8” larger. Wood floors should be 1” smaller than footprint, so corrugated panels
can extend below the framed walls.
3. Cut and lay out the front, back, and 2 side wall sections, as shown in Diagrams 1,2, & 3.
Assemble framing members, using 10d galvanized nails or 3” construction screws. Drill pilot holes
to avoid splitting dry lumber.
4. Erect assembled wall sections on footings/flooring surface. Fasten walls at corners, using 10d
galvanized nails or 3” construction screws. Square 4 corners, using a carpenter square or the 3,
4, 5 method.
5. Cut 2x6 ridge board to length and fasten between front and back gables.
6. Mark rafter spacing and install rafters using 10d galvanized nails or 3” construction screws.
7. Cut and install solid blocking between rafters using 10d galvanized
8. Nail vertical edge strips to tops of rafters and vertical wall members, using 1-1/2” galvanized nails.
Drill pilot holes to prevent splitting.
Note: Center lower end of each rafter over
vertical side wall members. Mark ridge board
for equal spacing of top rafter ends.
Important: Rafters must install parallel to
each other for panel corrugation to
align properly.
Cut front edge of lower blockMRKEX
Cut intermediate rafters
to match gable rafters.
7
6
4
Make concrete floors 8” larger than building footprint.
Optional: Framing can be fastened to concrete floor
using suitable anchoring hardware.
Note: Use sill sealer under bottom sill plates.
5
2
Stagger
blocking
for easier
assembly.
2x4
Side
Wall
6’
Dia. 1
8’
BACK
59”
Leave 1-1/2” gap for
2x6 ridge board.
2x2
2x2
Gable Rafter
Cut Rafter
ends at 45º.
2x4
Side
Wall
2x2
Dia. 2
8’
3’
FRONT
6’
Gable Rafter
Adjust size of gable vent
openings to accept
selected vents.
Adjust size of
door opening to
accept desired
door type.
2x4
Side
Wall
2x4
Side
Wall
2x2
Note: Use treated lumber for bottom sill plates.
Stagger
blocking
for easiest
assembly
10’
6.25’
24”
24”
O.C.
24”
O.C.
24”
O.C.
24”
Dia. 3
Left and Right Sidewalls
5