Handcrafted. Local. Natural. — Handmade mattresses and futons in Montreal since 1981
Most bunk bed frustrations come from two sources: wobbly frames and thin foam mattresses. The fixes are solid-wood construction and a proper natural-fiber mattress within the safe thickness limit, or skipping the bunk entirely with floor-level setups that growing kids often prefer. This guide covers all three paths.
Top bunks have a hard safety limit: the mattress surface must sit low enough that the guardrail rises at least 5 inches (127 mm) above it. Most frames therefore cap the mattress at 6-8 inches, and manufacturers fill that constraint with the cheapest possible foam slab. The result: kids sleep on 5 inches of polyurethane that bottoms out within two years. The better answer isn’t a thicker mattress, it’s a denser one: firm natural-fiber mattresses (cotton, wool, latex) deliver real support within 6-7 inches.
A bunk frame is furniture that gets climbed on daily: joinery matters more than looks. Check: solid wood (not hollow posts or MDF), bolted connections you can re-tighten (not staples or cams alone), guardrails on both sides of the top bunk, and a ladder angle a half-asleep child can manage. The Timberframe bunk we carry, made in Canada by Crate Designs, features massive solid-wood corner posts joined with mortise-and-tenon construction (the traditional joinery that outlasts any bolt), thick ladder rungs built into the frame, a full-length rear guardrail plus a removable front guardrail, and it separates into two independent beds when the kids outgrow stacking.
Floor-level sleeping eliminates the guardrail question entirely and grows with the child: a twin shikibuton serves from age 2 to adulthood.
When floor space is truly fixed and both children sleep in the room nightly, a well-built bunk remains the best use of space. Small shared urban bedrooms, cottages sleeping grandchildren, and rental units are its natural habitat. In those cases: solid wood frame, firm natural mattress within the height limit, and the bottom bunk for kids under 6 (a standard safety recommendation).
The mattress must leave at least 5 inches (127 mm) of guardrail above its surface; on most frames that means a maximum of 6-8 inches of mattress. Check your frame’s sticker or manual for its stated maximum.
Yes, if the frame’s weight rating allows it. Solid-wood bunks with mortise-and-tenon joinery like the Timberframe are built for decades of daily use; its top bunk takes a mattress up to 38″ wide × 73.5″ long and 8″ thick. Always check the manufacturer’s stated per-bunk rating, not the total.
Two shikibutons on tatami mats: they fold away daily, cost less than a quality bunk, and remove all fall risk.
They’re honest entry-level furniture; the common complaints are wobble over time and the thin mattresses sold alongside. Our guide Alternative to IKEA Bunk Beds covers the upgrade paths.
Browse our bunk beds and kids’ mattresses, or read The ultimate guide to buying a bunk bed.
