MegaGrow Greenhouse Manual - International Greenhouse Company

The MegaGrow 8ft Model
Manual
International Greenhouse Company
1644 Georgetown Road, Danville, IL 61832
TEL: (888)-281-9337 EMAIL: help@igcusa.com

WARRANTY
10 YEAR GUARANTEE
Greenhouse Megastore commitment to quality is priority No. 1
Frame assembly
We guarantee the frame of your greenhouse for ten years. If within that time a fault develops
due to faulty workmanship or materials, just return the parts to Greenhousemegastore and we
will replace the relevant parts free of charge.
Polycarbonate twin wall glazing
The polycarbonate (6mm) twin wall glazing includes a 10 year pro-rated warranty against
yellowing and hazing. Polycarbonate provides a long service in the most severe climates and
maintains its impact strength from –40F to 250F.
IMPORTANT
BEFORE BEGINNING ASSEMBLY
Review your packing checklist before you start assembling your greenhouse kit. In the event that you find any
missing items, please notify us immediately at 1-888-281-9337.
TOOLS REQUIRED
Electric drill with Phillips screwdriver bit.
7/16 Hex Nut driver.
7/16 open-end wrench.
3/8 open-end wrench. (For door roller adjustment)
Flat Head screwdriver. (To fit spring clips on door rollers)
Phillips screwdriver. (To fix eve plates)
Assembly time for two people is usually one day or about eight hours.
HELPFUL ADVICE
The greenhouse manual has been constructed using pictures and written instructions to make the assembly of
the kit as painless as possible. For a trouble free assembly makes sure the foundation is flat and level.
Stainless steel ¼-20 “T” bolts are used for the assembly. IMPORTANT: Make sure the correct number of
“T” bolts are slotted into the aluminum frame parts as given in the instructions. The installation of missed bolts
may require some disassembly.
HINT: Use masking tape to hold bolts in approximate position while assembling the greenhouse kit.
The glazing panels are UV coated on one side only, this side must face outward. The UV side is marked
“THIS SIDE UP” Do not remove the protective covering until ready to install the panel into the frame. Failure
to install the panels the correct side facing outward will void the warranty.
All parts of the aluminum frame fit together easily, if a part appears not to fit verify you are using the
correct part. Forcing a part into place will affect the integrity of the finished structure.
If you have a problem with the assembly of this greenhouse kit help is just a phone call away,
(1-888-281-9337) one of our staff will be pleased to help you get up and growing.

SELECTING A GREEN HOUSE SITE
Locating a Greenhouse:
The location of a greenhouse should be chosen very
carefully. During the harsh winter months, the position of
the greenhouse should receive at least six hours of direct
sunlight. Shelter from high winds and from excessive
water buildup should also be a consideration. Finding a
location that is close to water and electricity and is also
easily accessible from both home and garden, combined
with the above considerations, should make for a very
happy gardener.
For best heat gain during the winter, an east-west position
is the best choice, providing the maximum solar heat gain.
Since the sun is much lower during the winter months,
southern exposure might be restricted: In this case, simply
turn the greenhouse to a position that will allow the
maximum amount of winter sun to penetrate it.
(See diagram upper right)
FOUNDATIONS:
IT IS CRITICALLY IMPORTANT THAT FOUNDATIONS ARE SQUARE AND LEVEL.
for the greenhouse To be assembled correctly and all parts to fit. There are a number of common types of
greenhouse foundations used:-
A poured concrete slab.
A concrete foundation to frost line.
Pressure treated lumber 4x 6
Before you start check your local building code requirements.
Recommendation
Most MegaGrow greenhouses can be installed using 4” X 6” pressure treated lumber. This should be
set on the 4” edge and buried to about 4” to 5” below ground level. The corners are fixed using 6” angle
brackets. The additional weight of 4” X 6” over 4” X 4” should be adequate to hold the greenhouse
down.
If the greenhouse is to be positioned in a highly exposed area, it is recommended that the footings be
pinned down using rebar (approx 1Ft from the corners). The holes need to be drilled at an angle of about
45 degrees toward the center of the timber with the rebar driven down flush with the top of the timber.
The inside floor of the greenhouse should be covered with pea gravel or crushed limestone. This stone
will act as a storage heater, soaking up the heat of the sun during the day. This will reduce heating costs
during the winter months.
Concrete
If the greenhouse is to be located on a concrete footing or slab, mount a 2’ X 4” wood plate to the
surface of the concrete base. When using a concrete as a foundation it is important to consider drainage.

Side Assembly
SECTION-1
Tools Required: -7/16” Box Wrench.
Side parts Pack
(1) Side Cill (Item # 1).
(1) Gutter (Item # 2).
(2) Side Brace (Item # 4). NOTE:- The Side Brace is distinguishable from the
end brace by its length . The side brace is the longer of the two.
Glazing bars (For required number see chart ).
ASSEMBLY
STEP-1 Lay out parts see (PIC-1) Gutter to the top cill at the bottom.
STEP-2 Install “T” bolts in to gutter as (PIC-3) leve lose as shown.
STEP-2 Assemble Glazing bars to the gutter section using bolts from (STEP-2).
STEP-3 place “T” bolts into open end of glazing bar aprox ½” in from end
(see PIC-4) and mount to cill using second hole in from the end, because
this is the outside glazing bar place one end of the side brace onto the
“T” bolt before installing the nut. Install all remaining G/bars repeat the
procedure for the last G/bar using the remaining side brace, remember the
inside face must face out.
NOTE:- The inside face of the brace should face towards the end of the
side wall.
STEP-4 Secure the remaining (2) lose ends of the brace to the end slots in the gutter
section using a ”T” bolt, this is to temporarily support the brace to stop
damage until installing in (SECTION-4 Main assembly)
NOTE:- DO NOT TIGHTEN BOLTS AT THIS TIME “ SNUG UP ONLY”.
REPEAT ABOVE FOR THE SECOND SIDE.

Side Assembly
PIC-1
PIC-3
PIC-2
PIC-4

Back End Assembly
SECTION-3
Tools Required: -7/16” Box Wrench.
Back End parts Pack
(1) End Cill (Item # 6). (1) Rear R/H Corner Brace (Item # 15).
(1) L/H Corner Leg (Item # 8). (1) Rear L/H Corner Brace (Item # 17).
(1) R/H Corner Leg (Item # 7). (1) Rear Cross Brace (Item # 29SD).
(1) L/H Corner Roof (Item # 10). (1) L/H Outer Glazing Bar (Item # 12).
(1) R/H Corner Roof (Item # 9). (2) R/H Outer Glazing Bar (Item #11).
(1) R/H Inner Glazing Bar (Item #13). (1) Ridge Gusset Plate (Item #24).
(1) L/H Inner Glazing Bar (Item #14). (1) Leg Gusset Plate (Item #25).
(
ASSEMBLY
STEP-1 Lay out parts as in (PIC-1) Before starting assembly.
STEP-2 Assemble glazing bars to the cill, with “T” bolts as shown in (PIC-1).
Mount the (2) angle end braces to the cill, using the (3 rd ) hole in from each end as
shown in (PIC-6).
STEP-3 Insert (3) “T” bolts into each glazing bar from the top, (leave one bolt apox (½”)
in from the end for connection To Corner Roof (Items #9&10).
NOTE:- (1)“T” bolt placed in the (2) center bars are for the fan mounting bracket
If unit has no fan, only place (2) “T” bolts in the center G/bars.
STEP-4 Connect the (2) R/H glazing bars to the R/H Corner Roof bar (item #9).
STEP-5 Assemble leg gusset plate as (PIC-4) Insert (1) “T” bolt into the horizontal and
vertical slots as (PIC-2).Before connecting corner brace as (PIC-4) note the bolt slot
in the center of the brace this should intersect with the slot in the outer G/bar.
NOTE:- If the slot is not positioned over the G/bar you may have the wrong handed part.
Use the lower “T” bolt in the outer G/bar for connecting the (2) parts.
NOTE:- (PIC-4) also shows cross brace positioning.
Repeat assembly to R/H side and ridge gusset plate assemble as leg gusset
Remember to insert “T” bolts into the horizontal and vertical slots see (PIC-3).
STEP-6 Install the cross brace to the leg gusset as shown in (PIC-4). Use the
remaining “T” bolt in the (2) outside G/bars (if unit comes with fan use the (2)
lower “T” bolts in the (2) center G/bars to secure in place. (See fan mounting
for fan bracket positioning.

Back End Layout Assembly
P-2
P-3
P-1
P-4
P-6
P-5

Front end Assembly
Front End parts Pack
SECTION-3
Tools Required: -7/16” Box Wrench
(1) End Cill (Item # 6). (1) Door End Corner Brace (Item # 18).
(1) L/H Corner Leg (Item # 8). (2) Door Side Brace (Item # 23).
(1) R/H Corner Leg (Item # 7). (1) Door Header Bar (Item # 29).
(1) L/H Corner Ridge (Item # 10). (1) Door End Center Glazing Bar (Item # 30).
(1) R/H Corner Ridge (Item # 9). (2) Leg Gusset Plates (Item #22).
(1) R/H Door Post (Item #21). (1) Ridge Gusset Plate (Item #24).
(1) L/H Door Post (Item #22). (1) Mounting Bkt (Item #31).
(1) Door Slide Assemble (Item #32-33). (1) R/H Door Slide End Mount Bkt (Item #34).
(2) Slide End Cover (Item #36) (1) L/H Door Slide End Mount Bkt (Item #35)
ASSEMBLY
STEP-1 Lay out parts as in (PIC-1) Before starting assembly.
STEP-2 Assemble door side post (Item#21&22) to the cill, with “T” bolts including the (2)
corner braces using the (3 rd ) hole in on both sides. Connect the to corner legs to
the outside holes in the cill as shown in (PIC-1).
STEP-3 Insert (2) “T” bolts into each door side post(Item#21&22) from the top, (leave one
bolt aprox (½”) in from the end for connection To Corner Roof (Items #9&10).
NOTE:- (1)“T” bolt placed in the door post is for connection of the door side brace,
move “T” bolt to aprox mid point in the door post.
STEP-4 Connect the R/H door post (Item#21) to the R/H Corner Roof bar (item #9).
STEP-5 Assemble leg gusset plate, Insert (1) “T” bolt into the horizontal and
vertical slots as (PIC-2 Back assembly) add (1) additional “T” bolt in the horizontal
slot of the corner leg , this is for the connection of the door side brace.
Repeat (steps 4&5) for assembly to R/H side. Assemble ridge gusset plate as leg gusset
Remember to insert “T” bolts into the horizontal and vertical slots see (PIC-3)
Back assembly . Install the (2) door side brace(Item#23).
STEP-6 Insert (4) “T” bolts into the door slide center G/bar move (2) “T” bolts to aprox
center of the G/bar, (leave one bolt aprox (½”) in from each end for connection To Corner
Roof (Items #9&10). Connect slide in place to the (2) corner roof sections.
Install center G/bar to center hole in the ridge plat and using the (3) hole bracket
connect to the center of the door slide as (PIC-2).
NOTE:- The (2) ¾” angle sections remaining are not used at this time put to one side
Until final assembly of the doors.

Front End Assembly
P-4
P-3
P-2A
P-
P-1 P-2

Main frame Assembly
SECTION-4
Tools Required: -7/16” Box Wrench.
7/16” Open Wrench.
Side parts Pack
(1) Ridge bar (Item # 3).
(2 per vent ) Mounting Bkt (Item #31).
Glazing bars (Item #5) (For required number see chart ).
ASSEMBLY
STEP-1 Position sides and end assembly’s around the foundation for final assembly.
STEP-2 Start by positioning the back assembly and one side assembly on the foundation.
Fit the back corner leg onto the “T” bolt on the end of the side cill. See (PIC’s-1&2).
Mount the gutter between the top of the leg and corner ridge bar as (PIC’s-3&4).
Slide remaining (2) bolts from the top of the leg and bottom of ridge corners into the
slots and secure.
NOTE:-As in (PIC-4) both corners bars MUST butt up to the gutter bar.
STEP-3 Repeat step-(2) on remaining (30 corners.
STEP-4 Fit the ridge bar into top of ridge corner bars as (PIC’s 6&7). Use remaining (2) bolts to
secure as (PIC-6) both ends.
STEP-5 Measure across the front end from the out side at the bottom of the legs, and then at the top
of the legs. The two readings should be within 1/8”. Repeat at the back. If the readings are
not within tolerance, first check the top leg joints, and ridge joints for gap. If the joints are
ok then the angle of the ridge will need to be adjusted. Adjusting the ridge up will reduce
the top leg dimension. Lowering the ridge will increase the dimension.
To adjust the ridge high slacken all bolts holding the (2) leg gussets, ridge gusset (if rear end
Is to be adjusted then ) all glazing bars. (if front end is to be adjusted then) door post and
door header. Have a second person or use a 2x4 to reposition the ridge and snug the bolts.

Main Frame Assembly
PIC-1
PIC-2
PIC-3
PIC-4
PIC-6
PIC-5
PIC-7

Roof &Vent Assembly
SECTION-5
Tools Required: -7/16” Box Wrench.
Screw drivers X & flat end.
Vent kit (Parts Per Kit)
(1) Vent Latch Plate (Item #38).
(2) Vent side bars (Item # 39).
(1) Vent Hinge Bar (Item # 40).
(1) Vent fixed Latch Plate (Item #41).
(2) Mounting Bkt’s (Item #31).
(1) Vent eve retaining plate (Item # 37).
(2) Vent stops (Item #16).
ASSEMBLY
STEP-1 Start the assembly of the frame install “T” bolt into the hinge bar
(insert “T” bolt from the side flanged side see (PIC-5). Fit “T” bolts into
latch plate the head of the bolt on the small flange side Assemble vent
frame as (PIC-2) with side bars.
NOTE:-In (PIC-2) the vent opener is shown with the channel facing up.
STEP-2 Install glazing seal down the (2) side bars and along the small flange on
The latch plate.
STEP-3 install the glazing panel using glazing clips as shown in (Section-6, PIC-3)
With the eve retaining plate fitted on the open end of the glazing panel.
NOTE:-Fit first clip aprox (2) inches in at the eve plate end.
NOTE:-The glazing panel is sealed on (1) end only, the sealed end fits into
the hinged frame section.
STEP-4 Turn the vent over and install latch using screws provided in bag. Orientation
Of the latch in (PIC-2) you see inside of the latch.
STEP-5 Install the vent into the hinge channel as shown in (PIC-6). Slide the vent
Along the ridge and centralize over the two glazing bars(Vent should seat,
without the (2) top frame nuts contacting the glazing bars) in required
position.
STEP-5 Install (2) “T” bolts into each glazing bar slide “T” bolts up to the vent
Fit (1) mounting bracket to each side, install the fixed latch plate (Item#41).

Roof Vent Assembly
PIC-1
PIC-2
PIC-3
PIC-4
PIC-5
PIC-6

Roof Vent Assembly

Glazing Assembly
SECTION-6
Tools Required: -Drill with s/driver bit.
Sharp knife.
Side parts Pack
** Glazing Seal (Item #P1). ** Eve Retaining plate (Item #26).
** Glazing Clips (Item # P2) . ** Cill retainer (Item #27).
** Screw s/drill #10-5/8” (Item #P5).
GLAZING PANELS
** Side & Roof (Item # 58). (1) R/H Top door end panel (Item # 52).
** Vent Lower panel (Item #48). (1) L/H Top door end panel (Item #53).
** Vent panel (Item #49). (1) R/H Outer back panel (Item #54).
(1) R/H front door side panel (Item # 50). (1) L/H Outer back panel (Item #55).
(1) L/H Front door side panel (Item #51). (1) R/H Inner back panel (Item #56).
(1) Center back panel (Item #59). (1) L/H Inner back panel (Item #57).
** For Required Number See List.
ASSEMBLY
STEP-1 Start on the outside of the back end attach glazing seal on the corner ridge bar from the
top of the ridge down to the corner leg see (PIC-1), complete this on both sides.
Place seal down the (2) legs and on both sides of the glazing bars.
NOTE:- When glazing is installed seal will be across the top and down both sides. There is no
seal along the cill.
Once seal is complete on the back repeat for the front end.
For the wall and roof panels place tape down the (2) sides only.
For the lower vent panel tape across the fixed latch plate and down the (2) sides.
STEP-2 Install the glazing start at the back end install the center panel first ( If installing the fan
See SECTION-8) work from center out using glazing clips space apox 12-15 inches apart
See (PIC-3). Repeat on the front end.
NOTE:-Glazing will help square the frame as it is installed, adjust the framing as required.
STEP-3 Install eve retaining plate to the end without aluminum tape of roof panels by sliding into
the slot on the back of the eve retaining plate, place the panel in position holding the panel
aprox 12” above the gutter slide the panel up into the ridge section lower panel into small
recess in the back of the gutter section and secure with glazing clips. As with the vent place
first set of clips down near to eve retaining plate to secure in place (PIC-4).
STEP-4
Install side wall panels place top of panel under gutter and slide into place and secure with
glazing clips.
STEP-5 install cill retaining plates around the bottom of panels. Place retainer up against glazing and
secure using 5/8” self drilling screws (PIC-5).
NOTE:- DO NOT REMOVE the protective cover from the glazing panels until You are ready to
Install. THE PANELS HAVE BEEN TREATED WITH A UV PROTECTIVE TO STOP
DISCOLORATION ON ONE SIDE. THIS SIDE MUST FACE OUT.

Glazing Assembly
PIC-1
PIC-2
PIC-3
PIC-4
PIC-5

SCREEN DOOR SUPLIMENTAL
INFORMATION