Lifetime vs Keter Sheds: Key Differences (November 2026)
Choose Lifetime for its included floor and wider stated door opening; choose Keter Factor for more stated storage capacity and a skylight. Both are walk-in resin sheds in the 8 ft class, so compare their layouts and the space you have.
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Choose Lifetime for its included floor and wider stated door opening; choose Keter Factor for more stated storage capacity and a skylight. Both are walk-in resin sheds in the 8 ft class, so the right pick depends on your available footprint and what you need to move inside.
The Lifetime 6418 measures 58 x 94 x 96 in and includes an HDPE floor. The Keter Factor is an 8 x 6 ft shed with a stated capacity of 285 cu ft and a 54.5 in wide door opening.
Lifetime vs Keter sheds: which fits your yard?
The Lifetime 6418 takes a narrower footprint, while the Keter Factor is the wider 8 x 6 ft option. Measure the usable area, then leave the clearance required by each shed's assembly instructions.
The Lifetime's exterior dimensions are 58 in deep, 94 in wide and 96 in high. Keter Factor measures 71.5 in deep, 101 in wide and 95.5 in high.
Those dimensions put both sheds in a similar height range, but the Factor needs more depth. A 6 ft class shed can be harder to place beside a fence or path than an 8 x 5 ft class shed.
Mark each footprint with tape or stakes before ordering. Check that the doors can open fully and that you can reach the walls for assembly and upkeep.
What does 8 ft class mean for these sheds?
The Lifetime is titled as an 8 by 5 ft shed, and the Factor as an 8 x 6 ft shed. The listed exterior dimensions are more useful for planning because nominal size labels can round the actual measurements.
The Keter Manor offers another footprint, at 73.1 in deep by 89.4 in wide. If the Factor is too wide for the spot, compare the Manor's layout and its double doors before ruling out Keter.
Our guide to resin sheds versus metal sheds explains how material choice can affect the broader decision. For layout, start with the storage items and the open space around the doors.
Which shed makes larger items easier to move?
The Keter Factor has the wider stated door opening, while Lifetime gives a 4 ft wide by 6 ft high opening. Check the measurements of your largest item, including handles and any parts that stick out.
Lifetime's opening is 48 in wide and 72 in high. Keter Factor's door measures 54.5 in wide and 75.2 in high, giving it 6.5 in more width and 3.2 in more height.
That difference may help with a mower or patio furniture, but it doesn't guarantee a particular item will fit. Measure the item at its widest point and account for the angle you'll need to turn it through the doorway.
The Manor has double doors, but the door opening width isn't specified here. Don't assume that double doors provide more clearance than the Factor's; check the assembly instructions and exact dimensions before making it your large-item shed.
If you store a riding mower, use our guide to storage sheds for lawn mowers to think through door access and turning room. A clear path from the yard matters as much as the opening itself.
Does the included floor matter?
Lifetime 6418 includes an HDPE floor, while the Factor's floor inclusion isn't specified here. Confirm the base and floor requirements in the exact shed manual before preparing the site.
The Lifetime floor has a slip resistant surface and beveled edge. Its stated material resists oil and stains, which may be useful if you store tools or lawn equipment.
The Keter Manor includes a floor panel. That makes it a relevant alternative if you want a Keter shed with a floor, though its footprint differs from the Factor.
Don't treat a floor panel as a substitute for a properly prepared base. Our guide on what to put under a resin shed covers the site planning steps to review before assembly.
Which shed offers more useful storage?
The Keter Factor has the clearest stated capacity at 285 cu ft; Lifetime emphasizes its interior dimensions instead. Match the storage shape to the items you plan to keep inside.
Lifetime's interior measures 90 in wide by 54 in deep, with height ranging from 70 to 94 in. The high pitched roof and A-frame trusses create that changing interior height.
Factor's exterior is 8 x 6 ft, and its capacity is stated as 285 cu ft. Capacity helps with a rough comparison, but it doesn't tell you whether a tall mower or wide shelving will fit comfortably.
Make a short list of the largest items first: mower, bins, long tools and furniture. Check both the shed's interior and door dimensions against those items, then reserve space for walking and reaching.
Is the Keter Manor another 8 ft class option?
The Manor's exterior is 73.1 in deep, 89.4 in wide and 93.2 in high. Its double wall resin construction, floor panel, fixed window and skylight make it a separate layout to consider.
Keter describes it as suitable for garden tools, outdoor equipment and patio furniture. Its door opening width is not given here, so check the exact fit if you need to bring in a wide item.
The Manor's footprint is close to a 6 x 8 ft shape, rather than the Factor's 8 x 6 ft. Rotating the proportions can change whether a shed fits beside a wall, path or garden bed.
How do light and airflow compare?
Both Keter sheds have a skylight and ventilation; Lifetime has a peak screen vent cap for airflow. Consider where daylight and ventilation openings sit in relation to your stored items.
Keter Factor has a skylight and roof vents. The Manor has a fixed window, skylight and vent, so it adds a side opening for natural light.
Lifetime's peak screen vent cap supports airflow and ventilation. Its higher roof also gives more headroom near the peak than at the sides.
These features don't remove the need to store chemicals safely or follow the manual's guidance. Keep vents clear and avoid blocking openings with stacked boxes.
What upkeep and warranty details stand out?
Lifetime lists a 10-year limited manufacturer warranty, while Keter lists a 5-year warranty against manufacturing defects. Read the warranty terms for exclusions and the steps required to make a claim.
Lifetime describes UV protection, weather resistant seams and a finish that doesn't need painting. Keter says the Factor is weather resistant, waterproof and UV protected, and won't peel, rot or rust.
The Manor is described as requiring no varnish or paint and resisting warping, denting, rust, rot and peeling. These are brand statements, so follow the care instructions for the exact model.
Resin construction doesn't make setup or care irrelevant. For storage conditions and moisture planning, see how to keep a shed dry.
Which should you choose, Lifetime or Keter?
Pick the Lifetime 6418 if the included floor, 8 x 5 ft class footprint and 10-year limited warranty suit your plans. Pick the Keter Factor if you want its wider door, stated 285 cu ft capacity, skylight and 8 x 6 ft layout.
The Keter Manor is worth comparing when its narrower width and deeper footprint suit the space better than the Factor. It also has a floor panel, window and skylight, but its door width isn't specified here.
Before buying, compare the exact footprint, door opening and base requirements with your yard and largest stored item. For a second brand comparison, read Keter versus Lifetime deck boxes, which looks at a smaller patio storage choice.
Frequently asked questions
Is Lifetime or Keter better for a walk-in shed?
Lifetime is a better fit if an included floor and the 6418's stated 4 ft wide door opening matter most. Keter Factor is a better fit if its 285 cu ft capacity, 8 x 6 ft exterior size and skylight match your needs.
Measure the yard and stored items before choosing.
Does the Lifetime 6418 include a floor?
Yes. The Lifetime 6418 includes a high density polyethylene floor with a slip resistant surface and beveled edge.
Its exterior dimensions are 58 x 94 x 96 in, so check that footprint and the site preparation needs in the manual before assembly.
How much storage does the Keter Factor hold?
The Keter Factor has a stated capacity of 285 cubic feet and exterior dimensions of 8 x 6 ft. Capacity describes volume, not the shape of the floor area, so compare the door opening and the dimensions of your mower, furniture or tools too.
Are the Keter Factor and Manor the same size?
No. The Factor measures 8 x 6 ft externally, while the Manor measures about 73.1 x 89.4 x 93.2 in.
The Manor is closer to a 6 x 8 ft layout, so compare width and depth in inches against the exact spot in your yard.
What base should you prepare for a resin shed?
Prepare a firm, level base that matches the shed maker's instructions. The right surface depends on the site and shed design, so review what to put under a resin shed and measure the full footprint before you build.
