fiberglass discoloration

Hey Guys!

         I need your help. Do any of you know any reasons for a darkening of fiberglass insulation, other than age or mould? I'm doing an inspection tomorrow, and I want to be prepared with the right answers. This is in a 21 year old home, in an unfinished basement wall.

                                           Thanks for your input.

                                                      Harold Lowe

Air infiltration can discolor fibreglass insulation.

I completely agree! You will often see it in areas where brick pointing is in need of repair or around penetration points for wiring or piping that are not sealed properly.

Thanks guys!..I appreciate your input.