11 Mar Concrete slab flatness and prep are critical to avoid delays when delivering a quality product.
Avoid the problems, start the conversation early. Concrete slab flatness and preparation are critical to avoid delays when delivering a quality product. Minor discrepancies in new or existing subfloor surfaces can be adjusted by using patching compounds. This is considered, within reason, part of the flooring contractor’s work. Where discrepancies do not meet NFCA or floor covering manufacturers tolerances (Straight Edge Method, 3/16” over 10’), floor levels must be corrected by grinding and or using Hydraulic Cement Underlayment (HCU), the application of which shall be done by others (General Contractor or Owner) or may be undertaken by the flooring contractor as a billable extra. Correct specification of work responsibilities helps all parties budget and plan accordingly. Leaving the discussion for when the flooring installer starts work can result in delays and rejection of finished product. NFCA Floor Covering Reference Manual. www.nfca.ca