The Suncast Glidetop BMS4950 is a low, 98 cubic foot resin shed with a roof that slides back. You open the front doors, slide the lid, and walk in without ducking. At 4 ft 4 in tall, it fits under many windows, behind fences and in yards where a full-height shed would be too much.
Owners like it. The real questions are whether your mower fits through a 46.5 inch door, and whether you will build the foundation and anchoring that Suncast’s warranty requires.
How we reviewed it: this review is based on Suncast’s product page, dimension drawing, assembly manual and warranty terms, the Amazon listing, and owner feedback on Amazon, checked in October 2026. More on our process.
Quick Verdict
Buy the Glidetop if you need low-profile storage for a push mower, bikes, tools or trash cans, and you want to reach the back without crawling in. Amazon owners agree: quality gets 57 positive mentions and 4 negative, storage capacity 47 and 5.
Measure before you buy if you have a riding mower. And plan the base: Suncast’s warranty only applies if the shed is anchored to a proper foundation and padlocked when you’re not using it.
Suncast Glidetop BMS4950 Specifications
| Model | BMS4950 (Dove Gray); BMS4950P (Peppercorn) |
| Exterior (W x D x H) | 4 ft 9.5 in x 6 ft 7.75 in x 4 ft 4 in |
| Interior (W x D x H) | 4 ft 2.25 in x 5 ft 11.75 in x 3 ft 11 in |
| Door opening | 46.5 in wide x 46.25 in high |
| Capacity | 98 cubic feet; 25 sq ft of floor |
| Material | Multi-wall resin panels; reinforced resin floor |
| Roof | Slides open for walk-in access |
| Locking | Pad-lockable 3-door system (padlock not included) |
| Shed weight | 112 lb |
| Warranty | 10-year limited, with conditions (see below) |
How the Sliding Lid Works
Most horizontal sheds open only at the front, so getting something from the back means reaching over everything else. On the Glidetop you open the doors and slide the roof back, which lets you stand inside at the front and reach in from above. Suncast describes a pad-lockable “3-door” locking system, and the manual recommends a 5/16 in padlock (not included).
Owners mostly like it. The sliding roof gets 14 positive mentions on Amazon and 6 negative. Suncast’s manual tells you to keep the roof clear of snow and leaves, and not to stand, sit or store anything on it.
Will Your Mower Fit?
Push mowers, yes, easily. Riding mowers depend on the model. Check two numbers:
- Width: the door is 46.5 inches wide and the interior is 50.25 inches. Measure your mower at its widest point, with the discharge chute folded up if it folds.
- Length: the interior is 71.75 inches deep. Measure bumper to bumper.
One Amazon owner reports fitting a John Deere E130 lawn tractor, and another fits two push mowers plus pressure washers. Suncast itself names tractors, bikes and mowers as things the reinforced floor is built for.
The Warranty Has Conditions
Suncast gives its blow-molded sheds, the “BMS” models, a 10-year limited warranty. Read the conditions on Suncast’s warranty page before you buy:
- The shed must be built on a foundation as described in the manual and anchored to it.
- When you are not using it, the doors must be closed, latched and padlocked.
- Register within 90 days of purchase to activate the warranty, per the manual.
Meet those terms and Suncast rates its outdoor storage sheds for winds up to 65 mph. Skip them and the warranty is void. The manual also says damage from overtightening with a power drill is not covered.
Foundation and Assembly
Suncast’s manual gives two foundation options:
- Concrete slab: at least 4 inches thick, rebar recommended. Anchor the shed with eight 3/8 in masonry anchors and 1 in washers.
- Wood platform: exterior-grade wood on pier blocks or footings. Anchor with eight 1/4 to 3/8 in x 3 in lag screws and 1 in washers.
Anchors and washers are not in the box. Either way, the surface has to be square, flat and level, and the ground should slope away for drainage. Suncast warns that without it the shed will settle and distort over time.
Think about heat when you pick the spot. The manual says not to place the shed near anything that is or can get hot, or near highly reflective surfaces, and it names Low-E windows, which reflect more sunlight than standard glass. Some owners report doors warping after time in the sun, so a spot away from reflected glare is worth the extra planning.
Assembly itself is the easy part. Panels lock together with “Easy Bolts” tightened with the Easy Driver tool that comes in the kit. If you use a drill for the screws, Suncast recommends a variable-speed cordless drill with the clutch on its lowest setting and a #2 Phillips bit. Some steps need a second adult. Owners agree it is easy: 73 positive assembly mentions on Amazon against 14 negative, and one owner reports two people finished in about two hours.
Does It Keep Things Dry?
Suncast calls the Glidetop water resistant, not waterproof, and tells you to place it away from gutters and downspouts. A vapor barrier over the foundation can cut condensation, per the manual. Treat it as covered storage for mowers, tools and bins, and keep anything that must stay bone dry in sealed containers.
BMS4950 vs the Older BMS4900
The brown BMS4900 is the earlier version of this shed, with the same 98 cubic feet and the same sliding lid. Its Amazon listing carries 4.6 stars from 580 ratings, but it was showing as currently unavailable in October 2026. The gray BMS4950 is the version Amazon sells now, rated 4.5 out of 5 from 270 ratings and ranked #99 in Storage Sheds.
Pros and Cons
Pros
- Sliding lid gives walk-in access in a 52-inch-tall shed
- Low enough to sit under windows and behind fences
- Reinforced floor that Suncast says suits mowers and tractors
- Owners rate assembly as easy, and the tool is in the box
- Pad-lockable 3-door locking system
- 10-year limited warranty and a 65 mph wind rating when installed to spec
Cons
- Warranty requires a proper foundation, anchoring and a padlock
- Anchors, washers and padlock are not included
- 46.5-inch door can rule out wider riding mowers
- Water resistant, not waterproof
- Nothing can be stored on the roof
Who Should Buy It, and Who Should Skip It
Buy it if you need a low shed for a side yard or under a window, and you want to reach everything inside without emptying the front first.
Skip it if you need to stand up inside, store tall items like ladders upright, or fit a wide riding mower. For a walk-in shed, see our Suncast Modernist review or Rubbermaid 7×7 review. For smaller horizontal storage, see the Suncast horizontal shed and Rubbermaid horizontal shed reviews. Our best storage sheds roundup compares more options.
Final Verdict
The Glidetop does one job well: real storage in a shed short enough to keep out of sight. Owners rate it highly for quality, space and easy assembly. Measure your mower against the door, budget for a slab or platform plus anchors and a padlock, and it should give you years of low-maintenance storage.
Frequently Asked Questions
How big is the Suncast Glidetop door opening?
46.5 inches wide and 46.25 inches high, according to Suncast. The interior is 4 ft 2.25 in wide, 5 ft 11.75 in deep and 3 ft 11 in high.
Will a riding mower fit in the Glidetop?
Some will. One Amazon owner fits a John Deere E130. Measure your mower’s widest point against the 46.5 inch door and its length against the 71.75 inch interior depth.
Does the Glidetop need a foundation?
Yes. Suncast requires a square, flat, level foundation, either a concrete slab at least 4 inches thick or an exterior-grade wood platform on piers, with the shed anchored to it. The warranty depends on it.
What warranty does the Suncast Glidetop have?
A 10-year limited warranty. It requires the shed to be anchored to a proper foundation and padlocked when not in use, and you register within 90 days. Installed that way, Suncast rates its sheds for winds up to 65 mph.
Is the Glidetop waterproof?
No. Suncast calls it water resistant and recommends placing it away from gutters and downspouts.
What is the difference between the BMS4950 and BMS4900?
The BMS4900 is the older brown version with the same 98 cubic feet and sliding lid. The BMS4950 is the current Dove Gray version, and BMS4950P is Peppercorn.
