A flooring system may comprise a top floor layer, a subfloor, and/or an underlayment material disposed between the sub-floor and the top floor layer. The top floor layer may include a plurality of luxury vinyl tiles, configured such that respective tile joints may be formed between adjacent luxury vinyl tiles. The underlayment material may comprise a cross-linked, polyolefin foam. The composition of the underlayment material may be such that the tile joints between the adjacent luxury vinyl tiles may bend by less than about 45 degrees over a twelve hour period when 3.1 pounds per square inch (psi) of pressure is applied. The underlayment material may have a compressive creep of less than fifty percent of an original thickness associated with the underlayment material at a load of 3.1 psi and/or a compressive strength of more than 15 psi.