Fiberglass insulation is made of tiny, sharp glass fibers. They’re so small you can’t see them, but your skin feels them immediately. When these fibers land on your skin, they physically poke and scratch the outer layer.
Your body’s response? It sends inflammatory signals that scream, “Get this stuff off me!” That red, bumpy, intensely itchy rash is called contact dermatitis. Not an infection, just a very annoyed reaction to tiny glass needles.
And here’s the kicker: you might not even feel it at first. You finish the job, take a shower, and then—BAM—two hours later you’re scratching like a cat with fleas. Classic.
What About Other Types of Insulation?
You’re not off the hook if you’re using spray foam or cellulose. Spray foam contains chemicals that can cause a real allergic reaction in some people. We’re talking hives, swelling, even blisters if you’re unlucky.
Cellulose is mostly recycled paper and fire retardants, which is usually gentle. But if you’re sensitive to boric acid or dust, you can still get a weird, dry, patchy rash. So yes, insulation is a jerk to skin in many forms.
Here’s a rhetorical question for you: have you ever seen an insulation installer working without long sleeves and gloves? No? Because they know the deal. They’ve learned this lesson the hard way—probably twice.
Rash 22 common skin rashes pictures causes treatment – Artofit
