They are going to cover the entire house with a tent and pump gas in to the entire thing. Anything left inside will be killed. My main dilema is anything wooden I take out not getting treated and anything left in side getting contaminated.
However to give some kind of reference they said the type of gas is meant to suffocate. Anything food wise of mine that Isn't in a sealed can has to be removed from the house. But they said items like plates can be eaten off of after the gassing and do not be removed. I'm not worried about a snake eating a part of the rack but I can see how a rat could nibble on the wood. I just don't know if it would really soak in.