 Mr. Holmes, what is the average humidity stat or humidity we want in our home? Between 30-40% off the top of my head. When we have so much humidity what happens inside our home? I don't know if anyone's known as you wearing slippers, you're walking around and your slippers are sticking to the floor. Your hands are sticking to the handrail going up the stairs. These are signs that humidity is too high in your home. When humidity is too high in your home we get expansion in all the wood and then all of a sudden winter comes in, we turn on the furnace and it pulls out that humidity and we go right down to low humidity where everything starts to shrink. It starts to contract and when it contracts what happens is we break the caulking that we did on our trim, paint starts to peel, cracking within the plaster dry and people always say, why is my plaster cracking? Why is my trim cracking? My tile, my grout.