I was taking care today of some mold that started developing in the
attic by spraying it waith a solution of 1-part bleach and 5-parts
water... and I realized that may not be a good idea.
Our attic is filled with some off-white loose-fill insulation, and for
all I know bleach could cause some kind of reaction and create heat.

Is that possible?

(I took some of the insulation and put it in a bowl with some straight
bleach and have left it outside with a thermometer to see if something
happens.)

I probably won't sleep well tonight, thinking that right above my head
there's a proto-fire developing. I don't know exactly what kind of
insulation it is. It's cottony, fiberous, off white.

Thanks for any feedback!
Liam