Flooring FAQs by Bruce Flooring - Bruce Hardwood Flooring How do I install my Bruce Hardwood floor? Do I need a moisture barrier if my hardwood flooring will be installed above grade? May I glue down a 3/4" thick solid floor? May I nail down a 3/8" engineered floor? What type of adhesive do I need to use with my hardwood floor installation? Can I use a non-Armstrong adhesive..