Final answer:
A vapor barrier is necessary between the concrete slab and the subbase to prevent moisture from reaching flooring surfaces, causing damage and loosening.
Step-by-step explanation:
To prevent loosening of flooring surfaces that are glued to the slab, a vapor barrier must be placed between the concrete slab and the subbase. To prevent loosening of flooring surfaces that are glued to the slab, an underlayment must be placed between the slab and the subbase. The underlayment is typically a thin layer of material that helps absorb any movement or imperfections in the subbase, providing a stable surface for the flooring adhesive to bond to. Common underlayment materials include cork, foam, or plywood.The vapor barrier is essential in preventing moisture from reaching the flooring material, which can cause it to warp, buckle, or lose its adhesive bond. Moreover, controlling moisture helps in avoiding the growth of mold and mildew, which are detrimental to both the structural integrity of the flooring and indoor air quality.
To prevent loosening of flooring surfaces that are glued to the slab, an underlayment must be placed between the slab and the subbase. The underlayment is typically a thin layer of material that helps absorb any movement or imperfections in the subbase, providing a stable surface for the flooring adhesive to bond to. Common underlayment materials include cork, foam, or plywood.