Lifetime Sentinel 6404 Assembly instructions

8'x10' Outdoor Shed
OWNER’S MANUAL with Assembly Instructions

2
SAFETY INSTRUCTIONS
Most injuries are caused by misuse and/or not following instructions. Use
caution when using this shed.
To ensure safety, do not attempt to assemble this shed without following the instructions carefully. Check entire box and
inside all packing material for parts and/or additional instruction material. Before beginning assembly, read the instructions
and identify parts using the hardware identifier and parts list in this document. Proper and complete assembly, use and
supervision are essential for proper orientation and to reduce the risk of accident or injury.
FAILURE TO FOLLOW THESE WARNINGS MAY RESULT IN SERIOUS INJURY OR PROPERTY DAMAGE AND WILL VOID
WARRANTY.
• Do not use or store hot objects such as grills, blowtorches, welding equipment, etc. in the shed.
• If using a ladder during assembly, use extreme caution.
• Two capable adults are required for shed assembly. (It is also recommended that a third adult function as an
instruction reader.)
Surface must be leveled before installation. We recommend building a level work space with a cement or patio style
surface. If the surface is not properly leveled, the Outdoor Shed will not assemble correctly. Proper surface leveling will
save you time in the long run, so please do not ignore this step.
Level Surface Notice:
Consult all local building codes, as well as city and county ordinances, to ensure that the construction of the Outdoor
Shed does not require a building permit. Proper building permit documentation may be required in your neighborhood,
and it would be unfortunate to learn this after constructing the Shed.
Building Code Notice:
There is a 1/2” phillips head screwdriver bit included with the shed hardware. This bit can be used with any power
screwdriver or drill. The plastic pieces of your shed can be damaged by overtightening of screws. To avoid damage we
strongly recommend the use of a low-powered power screwdriver or a drill that has an adjustable clutch that is set on a
low torque setting. If neither is available, use a hand screwdriver. In any case, use caution to avoid overtightening the
screws.
Screwdriver Notice:
Sharp objects may damage your floor. If resting sharp, heavy objects on your shed floor, place a block of wood between
the sharp object and floor.
Floor Puncture Notice:
Congratulations on your Lifetime®Outdoor Shed purchase. By following the instructions below, your new Lifetime shed
should provide you with years of service and enjoyment.
Cleaning and Care
The polyethylene walls and shelves are stain- and solvent resistant. To clean, use a mild soap and a soft-bristled brush.Abrasive
cleaning materials may scratch the plastic and are not recommended. Repair scratches or rust spots on the metal by sanding
the affected area lightly; using a rust preventative spray primer; and finally, spraying with a high-gloss spray enamel paint. Avoid
placing a direct heat source on or near surfaces unless using a heat barrier.
MODEL #6404
Sentinel
8’ x 10’ Outdoor Shed
INSTRUCTION #1018238 8/28/2006
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3
Two Adults Required forAssembly
( + one Adult suggested as an instruction reader)
Suggested Tools & Materials
(Not Included):
Step Ladder
(2)
7/16” 3/8”
(2) (1)
Phillips Head
(1)
(1)
Power Drill * Work Light
Adjustable
(1)
Rubber Mallet
(1)
Box Knife
(1)
Pliers
(1)
(1)
Before Beginning Assembly:
A. Read the “Congratulations” letter on pages 4-5.
B. Remove Parts List from the center of these instructions and
make sure all parts are present and in good condition.
C. Find the color “Construction Tips” flyer and refer to it
during assembly.
Read This First!
For Assistance, including missing or broken parts,
Call Customer Service at:
** Customers outside of the U.S. or Canada, please contact the store for assistance. **
1 [phone]
Flashlight
(1)
* see “Screwdriver Notice” on page 2
KEY
Indicates a helpful hint or
important note.
Refers you to a specific step
in the full-color Construction
Tips flyer.
Indicates that a hand
screwdriver is required
for a step.
**Do Not Contact the Store!**

4
Dear Valued Customer,
We would like to congratulate you on your purchase of a Lifetime®Outdoor Storage Shed! We
are confident that you have made the perfect choice and you will be very pleased with your new
storage solution.
This Outdoor Storage Shed is part of the family of brands created and manufactured by
Lifetime®Products, Inc. Like all of our products, you can be assured that the quality of your
Lifetime Outdoor Storage Shed is the best in the world! All of our sheds are made in the USA,
something that is very important to us. And, we back that quality up by offering the best
warranty in the business – A 10-year warranty that covers everything on the shed… top to
boom!
All of our sheds are built with the highest-quality steel and polyethylene parts. The design and
construction of our steel-reinforced double-wall panels is second to none. All of our exposed
steel parts and trusses are powder coated and we only use high-impact polyethylene plastic.
What makes polyethylene so special? It has superior strength and durability, and, it won’t crack
or degrade outdoors.
So now that you know the quality you are geing in a Lifetime®Outdoor Storage Shed, please
take the time to READ THIS INSTRUCTION MANUAL!
We have taken great care in providing the best possible form of instructions to help you put
your new Outdoor Storage Shed together. Before you get started, PLEASE read the following
preparation tips to help you get started!
We can assure you, your construction experience will be a lot more enjoyable if you do!
PREPARATION TIPS:
• The first step is simple… RELAX! You have made a great purchase, but Rome was not built
in a day. Plan to spend a good part of your aernoon puing together your fine Outdoor Storage
Shed. Our philosophy is, if it comes together quickly and easily, it surely will come apart quickly
and easily! Your Lifetime®Outdoor Storage Shed will surely last for years if you are patient, and
take all the time necessary to put it together as we have instructed.
• Grab a friend to join in on the fun! This is not a one-person endeavor. We have found that not
only will things go smoother if you have two or more people participating in the construction of
the shed, but it will go quicker as well. So, the more the merrier!
• Make sure you have all the tools necessary for constructing your new shed. We have included
a 1/2 “ Phillips head screwdriver bit that may be used with any power screwdriver or drill.
This bit is your friend… please use it. The plastic pieces of your shed may become damaged
by overtightening the screws. To avoid this damage, we strongly recommend the use of a low-
powered power screwdriver or a drill that has an adjustable clutch that is set on a low-torque
- 1 -
IMPORTANT! Please Read

5
seing. If neither is available, use a hand screwdriver. If a hand screwdriver is all you have, take
several breaks… your wrist will need it!
• You will also need two small step ladders (when it comes time to do the roof!), a 7/16” wrench
and a 3/8” wrench.
• The small wood block in your shed box is there for a reason. DO NOT THROW THE WOOD
BLOCK AWAY, it is necessary for aaching the wall panels to the floor.
• Read through the entire instruction manual and “Construction Tips” insert before you start.
It’s always a great practice to get a feel for the flow of the process and to familiarize yourself with
the parts involved. But, try not to get ahead of yourself and start the process out of order.
• FOLLOW THE INSTRUCTIONS IN ORDER! Everything goes together in a certain order,
and we have learned what that correct order should be. In our state-of-the-art research and
testing facility, we have painstakingly created these instructions. The order of construction is
there for a reason, and some parts simply will not fit if built out of order. Just follow along with
the order in the instructions and everything will fit together and things will go very smooth.
• Refer to the color “Construction Tips” insert for the trickier construction spots. We have
identified a few places during construction where it can get a bit tricky, that is why we included
the color insert. This full-color instruction extra was created to beer guide you through the
process. Use it and you will be a much happier Outdoor Storage Shed builder.
• YOUR SHED MUST BE BUILT ON A LEVEL SURFACE! If the spot you have chosen to place
your wonderful new Outdoor Storage Shed is not level, the shed will not assemble correctly!
We recommend a level cement or patio style surface. Your shed is meant to last a long time, so
provide the proper foundation for it before you start to build.
• Before you build it, make sure you are allowed to build it! Consult all building codes, as well
as city and county ordinances, to ensure that you do not require a building permit to construct
your Outdoor Storage Shed. Proper building permit documentation may be required in your
neighborhood, and it would be quite unfortunate to learn this a
er your Outdoor Storage Shed is
already built!
Now that you’re ready to begin the construction of your wonderful new Outdoor Storage
Shed, step back, take a deep breath, get yourself a large cold beverage and enjoy yourself. We
guarantee that aer spending the right amount of time in building your shed, you will be able to
enjoy it for years to come.
Thanks for choosing Lifetime®Outdoor Storage, and have fun!
- 2 -

6
118 1/4”
93 1/2”
1Site Selection
8’
8’
10’ 10’
Wherever possible you should use the surfaces described above. When this is not possible, we
recommend you use one of the following options:
Alternate Site Preparation
OPTION 1: Wood Platform
Be sure you use lumber that is treated and approved for
outdoor use. Build outside frame to 93 1/2” x 118 1/4” outside
dimensions:
1a
Item Qty.
2” x 4” x 90 1/2” treated board* 8
2” x 4” x 118 1/4” treated board* 2
48” x 93 1/2”’ Plywood (ACX)** 2
22 1/4” x 93 1/2” Plywood (ACX)** 1
16d 3” common nails 32
8d 1 1/2” common nails 36
* All lumber must be rated for outdoor use.
** Trim 4’ x 8’ sheets to this size.
Surface must be leveled before installation. If
the surface is not properly leveled, the outdoor
shed will not assemble or function correctly.
Proper surface leveling will save you time in the long
run, so please do not ignore this step.
Place the 2” x 4” x 90 1/2” boards
on the inside of the frame. Nail each
board in place with the 16d nails.
15.25”
16”
16”
16”
16”
16”
To be sure to have studs
in the correct location to
nail plywood in the next
step, start measuring here
& measure from center to
center.
Note: Any platform or similar structure should be built above ground in order to avoid water pooling inside shed.
NOTICE: Shed Extension Kits are available for this shed.
Please consider possible shed expansion when planning the
site for your shed. See inside the back cover of this manual for
information on ordering Extension Kits.
The actual dimensions of your shed (at its widest and longest points) are 8’ x 10’. Be sure
to select a site that will accommodate these measurements. The base of the shed is
slightly smaller than this, so you will need to create a level surface that is at least 93.5” x
118.25”. We recommend using a level cement or patio style surface. This will provide the
best long-term performance for your shed.
118.25”
93.5”

7
OPTION 2: Filled Wood Frame
Once all boards are level and do not wobble,
pack “Pea” gravel or dirt around the outside of
the frame, and slope away from frame.
Now fill the inside of the frame with “Pea” gravel. Use
a leveling board to scrape off extra fill material and to
level the surface.
10’
8’
Square up the frame by measuring
from corner to corner. Measurement
A should equal Measurement B.
Item Qty.
2” x 4” x 7’ 5” treated board* 2
2” x 4” x 10’ treated board* 2
8d 1 1/2” common nails 16
1” ‘L’ bracket 4
“Pea” gravel 9.8 cu. ft. (aprox.)
Leveling board (2” x 4” x 10’) 1
* Must be rated for outdoor use
Nail an L-bracket on each corner of
the frame with 8d nails.
Be sure you use lumber that is treated and approved for outdoor use.
Cut outside frame to 8’ x 10’ outside dimensions:
A
B
Square up the frame by measuring from
corner to corner. Measurement A should
equal Measurement B.
A
B
Use aprox. 9.8
cu. ft. of “pea”
gravel.
Be sure that
frame is level.
Line up a large sheet of outdoor
rated plywood (48” x 93.5”) with
the end of the frame (same end
you measured from). Nail plywood
in place.
Place next large sheet.
Cut last sheet of plywood
to fit remaining space
(22”x93.5”) on frame. Nail
plywood in place.
Drill 3 evenly spaced 1/2” drain
holes in plywood between each 2” x
4” joist.
Place platform in the desired location. If platform does not
rest level on the ground, build up low points with loose dirt
until platform is stable.
Place platform in the desired location. If platform does not rest level on the ground, build up low points with
loose dirt or “Pea” gravel, until platform is stable.

8
2Assemble Floor
Lay Outer Floor Panel (109) flat on the ground.
Hold a Center Floor Panel (110) at an angle
(as shown) and fit tabs into slots and lay Center Floor
Panel flat. Add next Center Panel (110) and last Outer
Panel (109).
Remove plastic sheeting from Window (AA) and slide
Window into slot on the Window Wall Panel (125).
Attach a Window Latch (HQ) above each corner of the Window
as shown. When tightening Screws (SS), ensure the Window
Latches slide freely.
3Assemble Window
3.
2.
1.
3a
2a
Hardware Bags:
1001632 Screwdriver
SS (8)
Insert window
with bent edge at
top and pointing
away from the wall.
HQ (4)
Place screw (TC) in this hole to
keep window from sliding up
too far. Insert until flush with the
window
TC (2)
1015974
1004015
CAUTION
Sharp objects may damage your
floor. If resting sharp, heavy
objectsonyourshedfloor,placea
block of wood between the sharp
object and floor.
110
109
110 109
Do not overtighten. Insert Screw (TC) into the hole in the
window. Set panel aside. Repeat steps 3a and 3b for the
second Window.
3b
HQ
HQ
Before Beginning!
Remove the Parts List from the center of this manual, and locate
color “Construction Tips” insert in box.

9
Fold Left Corner Panel (105). Fit tabs of panel into the front left corner (while
facing shed) of your floor. Place a Wood Block (BC) under Floor Panel, directly
under first tab, then pull down on Corner Panel until tab snaps into place. Move block
under the next tab and repeat.
4Assemble Front Corner
Fold up edges of Corner Shelf (121). Line-up holes in Corner
Shelf with top set of pre-made holes in Left Corner Panel and
secure with Screws (SS).
4b
4a
Place Wood Block (BC) directly
under the tab you are inserting. Snap
tabs into place one at a time.
Hardware
Bags:1001632 Screwdriver
SS (4)
105
Top holes
121
Corner Shelf should only be placed
in top set of holes. See inside the
back cover for information on
purchasing additional shelves.

10
Snap Wall Panels (108) into place along the side of shed. Ensure
holes line up and then secure panels together with Screws (SS).
5Assemble Left Wall and Back Corners
1.
3.
2.
Do Not Over-Tighten Screws
Fold Right Corner Panel (104). Snap into place and secure with
Screws (SS).
Second person
should apply
pressure on opposite
side of the wall for easy
insertion of screws.
5b
5a
Hardware Bags:
1001632 Screwdriver
SS (20)
Place Wood Block (BC) directly under
the tab you are inserting. Snap tabs
into place one at a time.
Place Wood
Block (BC)
directly under
the tab you are
inserting. Snap tabs
into place one at a
time.
104
NOTE: The Window Wall Panel (125) may be inserted into any side Wall
Panel position; however, you should place one Window Wall Panel off-
center. You will then have enough wall space for your shelving. See page
11.

11
NOTE: Shelving Locations
Window in
Right Position
Window in
Middle Position
Window in
Left Position
Here Only Here Here
Shelf Support Channels can also
be installed in the Window Wall
Panel, as shown.
Keep in mind where you would like your shelving. You install shelving on Shelf Support Channels. The
Channels may be installed on the Window Wall Panel when Window Wall Panel is in any position. However,
you can only install the shelving on regular Wall Panels when those two Wall Panels are adjacent.
Here Here

12
Skip the back wall and fold the second Left Corner
Panel (105). Snap into place and fasten with Screws
(SS).Place Wood Block (BC) directly under
the tab you are inserting. Snap tabs
into place one at a time.
105
5d
5c Fold up edges of Corner Shelf (121). Line-up holes in Corner
Shelf with top set of pre-made holes in Corner Panel and secure
with Screws (SS).
Hardware
Bags:1001632 Screwdriver
SS (4)
Top holes
121
Corner Shelf should only be placed
in top set of holes. See inside
the back cover for information on
purchasing additional shelves.
5e Repeat step 5c for this Corner Panel.

13
6Assemble Right Wall and Last Corner
Assemble the right wall as you did the left wall by snapping Wall
Panels (108) into place along the side of shed. Window Wall
Panel (125) may be inserted into any side Wall Panel position. Ensure
holes line up and then secure panels together with Screws (SS).
Do Not Over-
Tighten Screws
Second person
should apply
pressure on opposite
side of the wall for easy
insertion of Screws.
6a
Hardware Bags:
1001632 Screwdriver
SS (20)
Place Wood Block (BC)
directly under the tab you
are inserting. Snap tabs into
place one at a time.
NOTE: The Window Wall Panel (125) may be inserted into any side Wall
Panel position; however, you should place one Window Wall Panel off-
center. You will then have enough wall space for your shelving. See page
14.

14
NOTE: Shelving Locations
Window in
Right Position
Window in
Middle Position
Window in
Left Position
Here Only Here Here
Shelf Support Channels can also
be installed in the Window Wall
Panel, as shown.
Keep in mind where you would like your shelving. You install shelving on Shelf Support Channels. The Channels
may be installed on the Window Wall Panel when Window Wall Panel is in any position. However, you can only install
the shelving on regular Wall Panels when those two Wall Panels are adjacent.
Here Here

15
Fold up edges of the last Corner Shelf (121). Line-up holes in
Corner Shelf with top set of pre-made holes in Right Corner Panel
and secure with Screws (SS).
6b
Hardware
Bags:1001632 Screwdriver
SS (4)
Top holes
121
Corner Shelf should only be placed
in top set of holes. See inside
the back cover for information on
purchasing additional shelves.

16
7Left Door Assembly
Rest Left Door (118) with front side down. Position Deadbolt
Latches (HM) in slots at top and bottom of door, and slide Door
End Channel (AG) onto the door.
Door End Channel fits
onto door with the flat
side up (facing the Dead
bolt Latches).
7a
TOP
BOTTOM
Hardware Bags:
1015974 Rubber Mallet (1)
(Not Actual Size)
HM (4)
Back of
Door
HM
HM
Install Left Door Handle (BB). Set door aside.
1. 2.
HL (4) PB (6)
VC (6)
Hardware Bags:
1015974 7/16” Wrenches (2)
Screwdriver
7b
You may need to nudge the
Door End Channel to make
the holes line up with the
gap in the door.
HC
PB
HP
Back of
Door
CAUTION
Donotovertighten. Overtightening
may damage parts and void
warranty.
HL
BB
VC
Repeat steps 7a and 7b for the second Left Door.
7c
HC (4)

17
8Right Door Assembly
8a Rest Right Shed Door (119) with front side down, and slide Door End Channel (AG) onto the door.
8b
PB (6)
VC (6)
Hardware Bags:
1015974 Screwdriver
Back of
Door
1.
HG
BA
Fit Thumb Lever Knobs
into Handle Grooves. 2. Rotate the Thumb Lever into
the handle. Slide forward
until the Knobs fit into the
holes in the handle.
3.
HG
BA
Attach the Handle and Thumb lever to the
Door.
PB
VC
PB VC
HG
BA
Knob
Groove
Knobs snap
into Holes
CAUTION
Donotovertighten. Overtightening
may damage parts and void
warranty.

18
HR (4)
Hardware Bags:
1015974
7/16” Wrenches (2)
Screwdriver
HH (4)
8c
HI HA
HN
You may need to nudge the
Door End Channel to make
the holes line up with the gap in
the door.
Install Handle Latch assembly onto the Right Shed Door.
HR
HH
HB
Attach Door Spring (HD) to Handle assembly. Set the door aside.
HD (2)
Hardware Bags: 1015974
(Not Actual Size)
Use pliers to pull
spring down and hook
into bottom hole.
8d
HA
HI
HD
Repeat steps 8a, 8b, 8c and 8d for the second Right Door.
8e
HB (4)

19
Parts List
Two Adults Required forAssembly
( + one Adult suggested as an instruction reader)
Before Beginning Assembly
Remove this Parts List and Hardware Identifier
from the Instructions and take an inventory of all
parts in both boxes.
Box 1 (Larger Box)
ID Reorder # Part # Description Qty
Main Hardware
109 CB10999 109 Outer Floor Panel 2
110 CB11099 110 Center Floor Panel 2
111 CB11182D 111 Front Gable 2
114 1009262 1009258 Roof Panel 8
115 CB11580C 115 Front Roof Cap 1
116 CB11680C 116 Rear Roof Cap 1
118 ZS11881C 118 Left Shed Door 2
119 1009334 1002607 Right Shed Door 2
121 CB12180 121 Corner Shelf 4
126 ZS12680 126 32” Short Shelf 2
AC 1001866 Roof Truss Brace 3
AD AR02406 Roof Truss Channels 6
AF AR02706 Shelf Support Channel 2
AG AR02820 Door End Channel 4
AH ZP07606 Gable Support Sq. Tube 2
AI ZS01006 Roof Support 8
AJ 1009232 Skylight 4
Box 2 (Smaller Box)
ID Reorder # Part # Description Qty
117 CB11780C Center Roof Cap 3
104 ZS10482 104 Right Corner Panel 2
105 ZS10582 105 Left Corner Panel 2
108 ZS10882 1013592 Wall Panel 4
125 ZS12582 125 Window Wall Panel 2
126 ZS12680 32” Short Shelf 1
AA ZS01200 Window 2
Shed Parts Box [1016058]
ID Reorder # Part # Description Qty
Main Hardware
AB 1009266 16” Pegboard Strip 2
AE 1009333 Shelf Support Bracket 6
BA 1015792 Right Door Handle 2
BB 1009123 Left Door Handle 2
BC IA01400 Wood Block 1
BD IA01500 Wood Shim 4
Truss Support Hardware Bag [1001884]
SA BB04500 Threaded Rod 3
HL BN00300 1/4” Cap Nut 6
Skylight Hardware Bag [HH11600]
LA BS05900 #10 x .5” Pan-head Screw 26
LB BW01200 #10 Fender Washer 26
ID Reorder # Part # Description Qty
Vent Hardware Bag [HH11900] x2
VA CH08381 Louvered Vent 1
VB DA03700 Vent Screen 1
PB BS05800 #10 x .75” Pan-head Screw 6
VC BW01300 #10 Washer 6
Door Handle Hardware Bag [1015974] x2
HA AC00100 Latch 1
HB 1000118 1/4” x 2” Carriage Bolt 2
HC 1000109 1/4” x 1.5” Carriage Bolt 2
HD BG01600 Door Spring 1
PB BS05800 #10 x .75” Pan-head Screw 7
VC BW01300 #10 Washer 6
HG 1015832 Thumb Lever 1
HH BA05700 .375” x .56” Steel Spacer 2
HI ZP07820 Latch Cover Plate 1
HL BN00300 1/4” Cap Nut 2
HO CK00600 Spacer, Door Hinge 2
HM CH11999 Deadbolt Latch 2
HN AG04120 Rt Door Latch (rnd hole) 1
HP AG04020 Lt Door Latch (oval hole) 1
HQ 1007360 Window Latch 2
HR 300022 1/4” Center Lock Nut 2
Front Gable Hardware Bag [HH12100] x2
GA BS05700 .25” x 1.125” Pan-head Scr. 7
GB CF03399 End Plug 2
Truss Hardware Bag [1015232]
TA 1001865 Truss Connector 3
HK BN01600 #10 Cap Nut 20
TC BS06100 #10 x 3/8” Pan-Head Scr. 21
TD DA04000 L-Key w/Phillips Head 1
TE BA07000 #2 Phillips Bit 1
Shed Screw Hardware Bag [1001632]
SS BS07500 .25” x .625” Screw 238
Tool Clip Assortment [HH12500]
CA BA06500 Pegbrd J-Hook 3
CB BA06600 Pegbrd L-Hook 3
CC BA06700 Pegbrd Toolholder 2
CD BA06800 Pegbrd 2” Dbl Arm Hook 1
CE BA06900 Pegbrd 4’ Dbl Arm Hook 1
Pegboard Screw Hardware Bag [1011398]
PB BS05800 #10 x 3/4” Pan-head Screw 11
Door Gap Flap Hardware Bag [1004034]
FA CH14199 Lt Gap Flap 1
FB CH14499 Rt Gap Flap 1
LA BS05900 #10 x .5” Pan-head Screw 4
*Part Numbers are listed when different from the Reorder Number.
The Part Number will appear on most of the plastic parts.

20
AH AI
105
AA
111
114
115 116 117
121
AC AD AE
104 109 110108
118
119
AF
AG
Front view Back view
Back view Front view
PULL OUT THIS PAGE
Shed Parts
(Not Actual Size)
126
125
AK