Installation Guide

10
Foundation plan Riga XL
Construction of your greenhouse with a concrete perimeter or strip foundation
If you did not buy a foundation frame, the greenhouse has to be erected safely by means of
a perimeter/strip foundation. Please build this according to the dimensions in the chart
below. You may also attach the greenhouse to a full concrete slab if desired - consider
texture and drainage. The foundation must be even and level.
Fasten the constructed greenhouse with the supplied angle brackets and TapCon (or
similar) screws. We recommend 2.5 to 3" length with anchor diameter of 1/4". TapCon
screws are not included and may be found at your local hardware with correct drill bit
included.
Door Extension Kit: If you are placing your greenhouse on a stem wall,
you will need a door extension kit and your wall must be 20" high. The
XL greenhouses have a front and back door, which is centered on the
gable wall. The rough opening for the door needs to be: 40 7/8” - better
to make it 41” .
When building your stem wall, use the exterior dimensions of the
greenhouse for the exterior dimensions of your wall - this will ensure
your doors will open fully and connect with the door catch. Please be
sure that the thickness of your wall allows for secure anchoring and
meets local building standards.
outer edge of foundation
outer edge of greenhouse
top edge of earth
Consult your local code for frost line depth recommendations
foundation greenhouse
442 cm
174 in
425 cm
167
3/4
in
442 cm
174 in
442 cm
174 in
425 cm
167
3/4
in
425 cm
167
3/4
in
Riga XL/5
Riga XL/6
Riga XL/7
Riga XL/8
Riga XL/9
442 cm
174 in
442 cm
174 in
425 cm
167
3/4
in
425 cm
167
3/4
in
519 cm
204
5/16
in
618 cm
243
5/16
in
718 cm
282
11/16
in
818 cm
322
1/16
in
918 cm
361
7/16
in
501 cm
197
1/4
in
601 cm
236
5/8
in
701 cm
276 in
801 cm
315
3/8
in
901 cm
354
3/4
in
20 cm
7 7/8 in
20 cm or 7 7/8 in
15