When you are dealing with awkward room dimensions, slanted roofs, or low ceilings, a standard vertical wall bed simply will not fit. After years of testing and building space-saving furniture for difficult floor plans, I consistently recommend a horizontal twin Murphy bed for these exact scenarios.
Unlike traditional models that fold down lengthwise and require over 80 inches of vertical wall clearance, horizontal models fold out sideways. This lateral layout transforms cramped quarters into functional, multi-use rooms without dominating your visual space, allowing you to reclaim your floor plan instantly. In this deep-dive guide, I will walk you through everything you need to know about side-folding beds, from spatial requirements to integrated desks and mattress selection.
The Mechanics: Why Choose a Horizontal Orientation?
A horizontal twin size Murphy bed houses a standard 38″ x 75″ twin mattress parallel to the wall. Because it folds out from its long side, the cabinet sits much lower to the ground.
When you install a vertical bed, you need nearly seven feet of ceiling height. A horizontal twin, however, only requires about 45 to 50 inches of vertical wall space. Furthermore, when the bed is deployed, it extends far less into the center of the room. A deployed horizontal twin only protrudes about 45 inches from the wall (including the cabinet depth). This makes it the ultimate solution for narrow rooms where a traditional fold-down bed would completely block a walkway or hit the opposite wall.
Ideal Room Setups for Side-Folding Beds
Because a horizontal twin Murphy bed sits so low to the ground, it thrives in architectural spaces where standard tall furniture fails. I have successfully integrated these beds into several challenging layouts:
- Attics and Lofts: Attics are notorious for their slanted A-frame roofs. A horizontal cabinet easily tucks against the low knee-wall without scraping the sloped ceiling when opening.
- Beneath Home Office Windows: You can mount a low-profile cabinet directly under a large panoramic window sill. I love this setup because it preserves your natural light and outdoor views while keeping a guest bed hidden right in your workspace.
- Basement Apartments: Drop ceilings and exposed ductwork in subterranean units or basement renovations are easily bypassed by the low-profile horizontal cabinet.
- Narrow Hallways and Corridors: Because it only extends a few feet into the room, you can install a horizontal bed in a narrow alcove or hallway without blocking foot traffic when guests are visiting.
Multi-Functional Upgrades: Cabinets and Desks
To get the absolute most out of a small space, I always recommend looking into multi-functional horizontal frames.
The Horizontal Twin Murphy Bed Cabinet If you want a piece of furniture that completely blends into your existing decor, a twin Murphy bed cabinet is an exceptional choice. When closed, a horizontal cabinet looks exactly like a high-end credenza, low bookshelf, or media console. Because the top of the cabinet sits at roughly waist height, you can use the top surface to display photographs, houseplant arrangements, or a flat-screen television. (Just note that for wall-mounted units, the top panel often flips back, so you may need to clear the top before opening the bed).
The Twin Murphy Bed with Desk Combo For the ultimate work-from-home setup, a horizontal twin Murphy bed with desk integration is a game-changer. Because the bed is oriented horizontally, the desk attached to the front panel is incredibly wide—often spanning over 70 inches. This gives you a massive workspace for dual monitors, paperwork, and laptops. When you pull the bed down, a specialized balancing mechanism lowers the desk perfectly parallel to the floor. Everything on your desk stays exactly where it is, resting safely beneath the mattress.
Mattress Selection: Avoiding the “Sideways Slump”
One critical detail that most buyers overlook with horizontal beds is the mattress. Can you use a regular mattress in a horizontal twin Murphy bed? Yes, but you have to be careful about the internal construction.
Because a horizontal bed stores the mattress on its side (long-ways) for extended periods, standard innerspring mattresses can suffer from “slumping.” Gravity pulls the internal coils downward, leading to a lumpy sleeping surface over time.
In my experience, the best mattresses for horizontal setups are high-density memory foam or latex mattresses. These materials hold their shape perfectly when stored sideways. If you strongly prefer an innerspring mattress, you must ensure it features a reinforced, rigid edge-support system. Additionally, you need to check the depth. Most horizontal cabinets are built to be low-profile, meaning they can only accommodate a mattress with a maximum thickness of 10 to 12 inches.
Disadvantages Specific to Horizontal Setups
As much as I advocate for them, side-folding beds do come with specific spatial trade-offs that you need to plan for before purchasing:
- Wider Wall Space Required: While they solve ceiling height issues, they demand massive wall width. A horizontal twin cabinet spans about 80 to 82 inches across your drywall. This means you lose a large stretch of continuous wall space.
- Side-Sleeping Access: Because the long side of the mattress is pushed flush against the wall, the person sleeping can only get in and out of the bed from one side. For a twin bed, this usually isn’t a problem, but it can make making the bed slightly more cumbersome.
- Wider Hardware Alignment: The wider frame means the gas pistons or spring mechanisms are further apart, requiring absolute precision during installation to ensure the bed doesn’t twist or bind when lifting.
Installation Pro-Tips for Horizontal Frames
If you are buying a DIY horizontal Murphy bed kit or installing a pre-built unit yourself, do not rush the process. A poorly installed horizontal bed is difficult to open and can damage your walls. Here are the professional steps I follow:
1. Locate Multiple Studs Because the frame is over 80 inches wide, you cannot rely on just two wall studs. You must locate and drill into at least three to four wall studs to safely anchor the lifting mechanism. Never use drywall anchors; the outward tension of the gas struts will pull them straight out of the wall.
2. Measure and Modify Your Baseboards A Murphy bed cabinet needs to sit perfectly flush against the drywall. I always measure the baseboards and either notch the back of the wooden cabinet or carefully remove a section of the room’s baseboard trim. If the unit does not sit flush against the wall, the pivot geometry will be compromised.
3. Level the Cabinet on Uneven Floors If you are installing the bed in a basement or an older home, the floors will not be perfectly level. Use wooden shims under the front and back of the cabinet base. If the 80-inch wide cabinet sits at an angle, the wide door panels will scrape against the frame, and the locking mechanisms will not engage properly.
DIY Plans vs. Pre-Built Models
Finally, you have to decide whether to build or buy.
If you are on a strict budget and have intermediate woodworking skills, purchasing a DIY Murphy bed kit is highly rewarding. These kits provide the heavy-duty horizontal pivot hinges, gas struts, and fold-down legs. You then purchase your own plywood and follow the included cut-list plans to build the cabinet. This allows you to customize the wood finish to match your room perfectly.
However, if you do not own a table saw or lack the time, purchasing a pre-built horizontal cabinet is the safer route. Today’s flat-pack models ship directly to your door with all pilot holes pre-drilled. While they cost more upfront, they save you weekends of labor and guarantee that the horizontal lifting mechanism is perfectly aligned straight out of the box.