Well would it be an issue, only way to really tell is to know what amount of weight would case an issue. Scales would tell you what your rig weights now, and then you figure how close you are to the gross allowable weight. If a couple of boxes of tile will put you at or over that number, then your stuck, NO. But it would be my guess would not make one bit of difference. They make a glue that the motorhome manufacturers are using so contacting them for what is best would be my suggestion.
Stacey Frank
2016 Tiffin Allegro Bus 40AP
2019 Tesla Model X
2015 Cadillac SRX we Tow
1991 Avanti Convertible