Why Wall Type Matters
The wall material decides how hard the job is, which tool works best, and how much weight your anchors hold. Misjudge it and you might stall the drill, crack the finish, or hit hidden utilities.
Three Quick Tests
- Tap for sound: hollow echo = drywall or hollow block; solid thud = concrete or solid brick.
- Check dust color: red dust suggests brick, gray gritty dust means concrete, soft white powder points to drywall.
- Measure thickness: peek at a doorway or switch box. About 10cm thick is usually lightweight wall; 20cm or more is structural.
Wall Type Cheat Sheet
| Type | What it looks like | Safe load | Recommended tools |
|---|---|---|---|
| Drywall | Hollow knock, smooth surface, 9–12mm panels | Light loads (≤5 kg) with anchors in studs | Impact drill + wood or drywall bits |
| Lightweight block | Pale gray dust, softer surface that dents easily | Medium loads (≤15 kg) with special anchors | Impact drill + masonry bits |
| Solid brick | Red-brown dust, visible mortar joints | Higher loads (≤30 kg) | Impact drill or small hammer drill + masonry bits |
| Reinforced concrete | Gray dust, heavy dull knock, >120mm thick | Heavy loads (>30 kg), watch for rebar | Hammer drill + SDS masonry bits |
Tool & Bit Suggestions
- Drywall: locate studs first, use toggle anchors, expect about 5 kg per point.
- Lightweight block: choose long nylon anchors, drill gently so the wall doesn’t crumble.
- Brick: 8–10mm anchors handle most fixtures; drilling along mortar joints often feels easier.
- Concrete: stick with SDS-Plus hammer drills and carbide bits. If you strike rebar, move slightly or switch to a metal bit to go around it.
With these quick checks you can identify nearly any wall in your home, pick the right tool, and get it right on the first try.
