The murphy bed wall: what to check before you bolt a bed into it
A freestanding bed can be dragged to a better spot in thirty seconds. A murphy bed marries one wall for the life of the room, so the wall interview happens once, before installation.
Why the wall choice deserves ten minutes of diligence
Wall beds have earned their comeback: guest rooms that are also offices, small apartments that need the floor back by day. But notice what the installation does. It fixes the sleeping position permanently against a single wall, with the sleeper's head typically inches from the wall surface, and it does so with lag bolts into studs, which means the choice does not get revisited. Everything this site says about bed placement and what walls contain therefore applies with the volume turned up: you are choosing your pillow's neighbors for the next decade, so it pays to know who they are.
The wall interview, in order
1. Structure. The cabinet anchors into studs or blocking, so the installer will find the framing regardless. Interior partition walls are usually fine; the questions are whether the studs are where the hardware needs them and whether anything in the cavity is in the fastener path.
2. What the cavity carries. Before anyone drills, know what runs behind the drywall. Outlets and switches on that wall (or the room behind it) tell you cables are present; a bathroom or kitchen on the far side tells you plumbing is. Two consequences follow. The mundane one is that lag bolts and hidden pipes or cables are a bad combination, which is why pros scan before they drill. The one this site cares about is proximity: a loaded cable bundle or a pipe carrying net current at exactly head height puts the strongest field in the room precisely where a person will spend eight hours a night.
3. The meter pass. Five minutes with a gaussmeter, done in the evening when household and neighborhood load is realistic. Sweep the candidate wall at the height where the pillow will land. A clean wall reads like the middle of the room. A stripe that follows a cable path, or a broad elevated zone along a plumbing wall, is exactly the finding you want to make now, while the answer can still be "use the other wall" at zero cost. After installation, the same finding costs a remounted cabinet.
4. The electrical plan. Most wall-bed projects relocate at least one outlet, and the better installations add reading lights or USB outlets inside the cabinet, which means a new switch leg or circuit extension. That work follows the same rule as any wiring near sleeping areas: done properly and permitted, not spliced into a buried box behind the new cabinetry where it can never be inspected again. The miswiring patterns described on the net currents page disproportionately live in exactly those improvised, hidden junctions.
What the good installers already do
Specialist wall-bed companies such as More Space Place, which designs and installs murphy beds across Northern Virginia, run this checklist as a matter of course: they scan the wall, map studs and services, settle the electrical plan during the design visit, and mount hardware with full knowledge of what the cavity holds. The gaussmeter pass is the one item on the list that is not yet industry standard, and it is the cheapest of them all. If you are having a wall bed designed and installed professionally, ask the designer to walk the wall choice with you and give the reasoning; if you are doing it yourself, the interview above is the same one the pros conduct, minus the experience, so take the extra ten minutes.
The payoff
Done in the right order, a murphy bed is a genuinely good outcome by this site's lights: the sleeping position gets chosen deliberately, with measurement, once, instead of drifting to whichever wall the furniture happened to fit. Most walls pass the interview. The point is to hold the interview before the lag bolts make the answer permanent.