The pursuit of a better night’s sleep often leads us to scrutinize every element of our bedroom, yet the foundation of comfort is sometimes hiding in plain sight. With the IKEA Hemnes daybed, a popular piece for small spaces and guest rooms, the standard-issue mattress is frequently the weak link in an otherwise stylish and functional design. This is where the IKEA Hemnes daybed mattress hack comes into play, a simple yet transformative modification that turns a generic cot into a truly comfortable sleeping solution.
Why the Stock Hemnes Mattress Falls Short
The primary issue with the stock mattress provided with the Hemnes daybed is its fundamental construction. Designed primarily for occasional use, it is typically thin, lacking in supportive structure, and made with low-density foam that compresses quickly under body weight. For a child taking an afternoon nap, this might be acceptable, but for an adult attempting to get a full night’s sleep, the result is often a lack of support, poor spinal alignment, and restless tossing and turning.
The Core Problem: Lack of Support
Without a solid foundation, the human body sinks unevenly into the thin foam. The hips and shoulders, being the heaviest points, sink too deeply, causing the spine to curve unnaturally throughout the night. This misalignment is the direct cause of morning stiffness and back pain, effectively negating any comfort the daybed frame was supposed to provide.

Solution 1: The High-Density Foam Topper
One of the most effective and straightforward IKEA Hemnes daybed mattress hacks involves replacing the thin comfort layer with a high-density foam topper. By placing a 2-inch or 3-inch layer of dense memory foam or latex directly on the slats, you create a stable and supportive base that prevents the body from sinking too far. This topper acts as a proper mattress foundation, providing the necessary support to keep the spine neutral while still allowing the softer top layer to contour comfortably.
- Measure the daybed frame precisely to avoid overhang.
- Opt for a density rating of 1.8 lbs per cubic foot or higher for durability.
- Ensure the topper is firm enough to provide lift, not just cushioning.
Solution 2: The Innerspring Conversion
For those who prefer the feel of traditional spring support, converting the daybed into a hybrid system is the ultimate hack. This involves removing the thin foam mattress entirely and installing a compact innerspring mattress cut to fit the frame. A standard twin-size innerspring mattress is significantly thicker and offers superior edge support and bounce compared to the foam alternative. The result is a sleeping surface that feels closer to a conventional bed, suitable for long-term use by adults.
Structural Reinforcement
It is critical to note that the slats of the Hemnes daybed may not be sturdy enough to handle the weight and tension of an innerspring mattress without sagging. To combat this, users should install a solid piece of plywood or a thick MDF board cut to the exact dimensions of the daybed frame. Placing this board between the slats and the spring mattress distributes the weight evenly and prevents the frame from bowing over time.

Enhancing Comfort with Accessories
Once the support issue is resolved, the next layer of the hack focuses on comfort and aesthetics. A standard twin mattress protector might not fit the unique dimensions of a daybed perfectly, so a custom-sized pad is essential. Adding a layer of breathable cotton or quilted padding not only extends the life of the support system but also softens the top feel. Pairing this with a few firm throw pillows arranged against the back panel transforms the daybed into a luxurious day lounging spot.
| Hack | Best For | Difficulty Level |
|---|---|---|
| High-Density Foam Topper | Budget-friendly, improving cushioning | Easy |
| Innerspring Conversion | Maximum support, adult use | Intermediate |
| Plywood Base Reinforcement | Structural integrity for heavy mattresses | Intermediate |
The Final Result: A Functional Sanctuary
Implementing the IKEA Hemnes daybed mattress hack is more than just a way to save money on a new mattress; it is a practical solution that maximizes the potential of your furniture. By addressing the core structural weakness of the design, you unlock the true functionality of the piece. The daybed transitions from a piece of furniture you simply tolerate into a comfortable and stylish sanctuary that serves both aesthetic and ergonomic purposes, proving that a little modification goes a long way.


















