The most common 'I damaged my new piece' email we get is from customers who hung a heavy glass star map on a single thumbtack or with a small adhesive strip. The piece fell, the glass cracked, the wall ended up with a hole anyway. All of this is avoidable with five minutes of preparation.
Here is how to hang a glass star map (or any glass-fronted framed art) without problems.
First, weigh the piece
A 16x20 inch glass star map with a metal frame typically weighs 4 to 7 pounds. A 20x24 weighs 8 to 12 pounds. A 24x36 can weigh 15-20 pounds.
This matters because the hanging method depends on weight. Pieces under 5 pounds can use simple drywall anchors. Pieces 5-15 pounds need real wall anchors or wood studs. Pieces over 15 pounds should always go into a wood stud.
If you're not sure of the weight, the rule of thumb is: glass star maps over 16x20 inches need real hardware. Adhesive strips alone won't hold them long-term.
Find what's behind the wall
Before you put anything in the wall, find out what type of wall it is.
Drywall: most common in US homes. Hollow except where studs are (vertical wood framing every 16 or 24 inches). Drywall alone holds limited weight. Studs hold heavy weight.
Plaster (older homes pre-1950s): harder, more brittle. Holds weight but cracks easily if you use the wrong anchor.
Brick or concrete: hardest to drill into but holds the most weight. Needs masonry anchors.
To find studs, use a stud finder (basic ones cost $15). Or knock on the wall; hollow sounds are drywall, solid sounds are studs. Stud locations matter because the strongest hang is into a stud.
The right hardware by weight
For pieces under 5 pounds: a plastic drywall anchor and a screw. Cheap, easy, works.
For pieces 5-15 pounds: either screw into a wood stud, or use a quality wall anchor rated for the weight. Toggle bolts work in drywall and hold up to 50 pounds.
For pieces 15+ pounds: screw into a wood stud. Or use multiple toggle bolts spaced apart. A single drywall anchor at this weight is risky long-term.
For plaster walls: use anchors specifically rated for plaster. Standard drywall anchors can crack plaster. Self-tapping screws work in plaster lath if you find the wood.
The hanging hardware on the piece itself
Glass star maps usually come with one of three back hangers:
D-rings on each side (small metal rings attached to the frame, connected by wire). Most flexible because you can hang from one nail or two.
Sawtooth hanger (a single horizontal serrated metal piece). Hangs from one nail or screw. Less stable than D-rings for heavy pieces.
French cleat (two interlocking metal strips, one on the wall and one on the piece). Most secure but requires precise installation.
Check the back of your piece to see which it has. Then match the wall hardware.
Two-nail hanging vs one-nail hanging
For pieces with wire across two D-rings, you can hang from one nail (the wire forms a V and rests on the nail) or from two nails (one nail at each side, level with each other).
One-nail hanging is faster but the piece can shift sideways and become crooked. Two-nail hanging keeps the piece level permanently.
For pieces over 5 pounds, two-nail hanging is the better move. The weight is distributed across two anchors, and you don't have to relevel the piece every few months.
The step-by-step
Step 1: decide where the piece goes. Mark the center point lightly with a pencil.
Step 2: measure the distance from the top of the piece to the hanging hardware (usually the wire or D-ring). For a typical glass star map this is 4-6 inches.
Step 3: mark the wall where the nail or anchor goes (the center point you marked, plus the distance from step 2). This is where the hardware goes, not where the top of the piece will be.
Step 4: drive the nail or install the anchor. If using a wall anchor, drill a pilot hole the size specified on the anchor packaging.
Step 5: hang the piece. Adjust until level. Use a small bubble level or the level app on your phone.
What to do if the piece is heavier than you thought
If the piece feels heavier than the listing said, or if you're hanging it in a high-traffic area where kids or pets might bump it, add a second anchor below the piece as a safety. The piece hangs from the top, the bottom anchor just stabilizes it.
For glass pieces in earthquake zones, museum putty (a small adhesive putty) applied to the bottom corners holds the piece against the wall without damaging it. This is what museums use for fragile artifacts.
What not to do
Don't use 3M Command strips or similar adhesive hooks for heavy glass pieces. They're rated for picture frames up to 16 pounds but real-world performance is unreliable. Pieces have fallen 2 months after installation when the adhesive failed.
Don't hang a glass piece over a child's bed, a sofa where people sleep, or a workspace where someone sits directly underneath. If anything fails, the falling glass becomes a real hazard.
Don't drill into the wall without checking for electrical wiring or plumbing first. Wires usually run vertically through studs, but in older homes they can be in unexpected places. Cheap voltage detectors cost $15 and tell you if there's wire in the wall.
The piece itself can break too
If you drop the piece during hanging, even from a foot above the ground, the glass can crack. Set the piece on a soft surface (a folded towel, the bed, a sofa cushion) while you're preparing the wall. Pick it up only when you're ready to hang it.
If you do crack the glass during installation, contact the maker. Most makers will replace the glass or the piece at cost if it happened during normal handling.
If you want to browse the glass wall art options, the star and moon maps collection is here. All pieces ship with D-ring hangers and a small hardware kit. Made in Fairfield, New Jersey. Ships in 1-2 business days.