Eye injuries account for ~20% of preventable construction-site injuries — flying nail fragments, drywall dust, mortar splash, kickback shrapnel from saw blades. Most are stopped by CSA-rated safety glasses worn correctly. Regular reading or sunglasses are not safety-rated and shatter under impact.
This guide explains the ratings to look for, when basic safety glasses are enough, and when you need a face shield or sealed goggles.
Before you start
Three things to settle:
1. CSA rating is non-negotiable. Look for the CSA safety mark stamped on the lens or frame. Without it, the glasses are fashion eyewear, not safety equipment — CSA-certified lenses pass a high-velocity impact test that ordinary lenses fail.
2. Safety glasses vs goggles vs face shield. Glasses: most tasks (sawing, drilling, grinding). Goggles (sealed): dust-heavy work, chemicals, splash. Face shield (over glasses): grinding metal, demolition with overhead debris, lawn mower cleaning.
3. Prescription wearers. Standard safety glasses fit OVER prescription glasses (look for 'OTG' style). Or get prescription-rated CSA glasses from optical shops. Never assume your prescription glasses are impact-rated — they aren't.
What you'll need
Tools
- Cleaning cloth (microfibre)
Materials
- CSA safety glasses (clear, indoor)
- CSA tinted safety glasses (outdoor work in sun)
- Sealed safety goggles (for dust, chemicals)
- Face shield (for high-impact tasks like grinding)
- Anti-fog lens spray or anti-fog wipes
CSA stamp is the only thing that matters
CSA certification covers both basic- and high-impact ratings. For renovation work, choose the high-impact rating — check the lens or frame for the CSA mark before buying.
Look for the stamp on the inside of the temple or on the lens itself. If you can't find it, the glasses don't have the rating.
Step-by-step instructions
Verify the CSA rating
Inspect the inside of the temple (arm) or the lens edge for 'CSA' or 'CSA+' marking.
If just 'CSA' (no plus), the glasses are basic-impact only — fine for light-duty drilling but not for nailers, grinders, or saws.
If no CSA marking at all, the glasses are not safety-rated. Don't use for anything more aggressive than dust.
Pick the right tint
Clear: indoor work, low light, accurate colour perception (electrical wiring colour codes).
Amber/yellow: low-light or overcast outdoor work, increases contrast.
Smoke/grey: bright sun outdoor (roofing, deck building, exterior painting on a sunny day).
Indoor-outdoor (light tint with anti-reflective): garage and outdoor combo days.
Fit check
Glasses must sit close to the brow with no gap above. Gaps let debris fall behind the lens.
Temples (arms) should grip without pinching. Adjustable temple length helps.
Foam-gasket safety glasses (foam around the inside frame) reduce dust ingress for moderate-dust tasks.
Switch to goggles when dust or splash is heavy
Insulation install (especially fibreglass), drywall demo, mortar mixing, paint stripping: sealed goggles, not glasses.
Sealed goggles have a foam or rubber gasket all around — debris and splash can't get behind the lens.
Vented goggles are fine for dust; for chemical splash, use indirect-vented or non-vented.
Add a face shield for high-impact tasks
Always wear safety glasses UNDER the face shield, never alone. Face shields don't seal at the bottom and chips can ricochet upward.
Required for: angle grinder use, chop saw cutting metal, demolition with overhead debris risk, mowing/string trimming.
Pivot up when not actively cutting.
Manage fogging
Fog is the #1 reason people take safety glasses off mid-task. Apply anti-fog spray or wipes to both lens sides.
Hot/cold transitions (warm body, cold lens, garage in winter): fog is unavoidable for the first minute. Wait it out.
Sweat fogging: bandana under the lens, or pick foam-gasket glasses with vent ports.
Clean correctly
Microfibre cloth only. Paper towels and shop rags scratch the lens, weakening impact resistance and reducing visibility.
Mild soap and water. Avoid solvents — destroys lens coatings.
Air-dry or pat dry; don't rub vigorously.
Replace when scratched or impacted
Deep scratches in the line of sight: replace. Scratched lenses hurt visibility and may have weakened impact rating.
Glasses that took a hit (chipped lens, cracked frame): replace immediately. They've used their impact budget.
Old foam gaskets (yellowed, hardened): replace gasket or replace glasses.
Common mistakes that cost you
- Sunglasses or readers as 'safety glasses'. Not impact-rated. Shatter on impact. Get CSA glasses.
- Glasses on top of head 'just for a sec'. Most eye injuries happen during 'just one quick cut' moments. Glasses on or off — don't park them on your head while you work.
- Skipping face shield for grinding. Angle grinder spits sparks and shrapnel at chest height. Face shield + CSA glasses both required.
- Goggles fogging → take them off. Apply anti-fog spray. Don't compromise.
- Trusting prescription glasses. Prescription frames + lenses are not CSA unless specifically made that way.
Frequently asked questions
Are wraparound sunglasses good enough for outdoor renovation work?
Only if they carry the CSA marking — most don't.
Sport sunglasses (Oakley, etc.) sometimes meet CSA — check the inside of the temple for the stamp.
Default to CSA-rated tinted safety glasses for outdoor work.
Do I need bifocal safety glasses?
If you're over 40 and need readers for measurements, yes. Bifocal CSA safety glasses save you from constantly swapping pairs.
Or get prescription CSA from an optometrist.
When do I need full goggles vs. glasses?
Glasses: for projectiles from in front (sawing, drilling, normal handling).
Goggles: for dust, fine particles, splashes, anything that comes from below or above (insulation install, mortar mixing, sanding ceilings).
When to call us instead
PPE is mandatory on all our renovation sites. We supply CSA glasses to crews and require them on every active task.
Book a free 60-minute site visit →Related Ottawa services
If you're planning a major renovation, our team handles all on-site safety. Book a free 60-minute consultation.