Is Rockwool Harmful to Lungs?
An important question for professionals working with rockwool. Here you'll find all facts about safety and health.
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The Short Answer
Horticulture rockwool is generally safe when you take normal precautions. Modern rockwool plugs contain no harmful fibers that are dangerous to lungs.
Difference with Insulation Rockwool
It's important to distinguish between growing rockwool and insulation rockwool:
- ✓Growing rockwool: Larger fibers, safer to use
- ✓Insulation rockwool: Finer fibers, more caution needed
- ✓Different production processes and applications
Safety of Growing Rockwool
Horticulture rockwool has specific properties that make it safer:
- ✓Larger fiber diameter (>5 μm)
- ✓Not respirable (too large to inhale)
- ✓No WHO carcinogen classification
- ✓Meets EU safety standards
Recommended Precautions
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Wear gloves during intensive contact👕
Use long-sleeved work clothing😷
Dust mask when cutting/processing (optional)🚿
Wash hands after use💨
Work in well-ventilated area🧹
Keep workspace cleanWhen to Be Extra Careful?
- ⚠️When cutting or processing rockwool
- ⚠️In dusty environments
- ⚠️With sensitive skin or airways
- ⚠️When processing large quantities
Symptoms of Excessive Exposure
- ℹ️Mild skin irritation (temporary)
- ℹ️Itching (disappears after washing)
- ℹ️Mild eye irritation (during dusty work)
- ℹ️Throat irritation (in extreme dustiness)
Note: These symptoms are mild and temporary. Serious health problems are very unlikely with normal use.
Conclusion
Horticulture rockwool is safe to use when you take basic precautions. The fibers are too large to be inhaled and pose no health risk. Wear protective clothing during intensive contact and you're safely protected.