3 / JOBSITE INSPECTION & PREPARATION IT IS THE INSTALLER/OWNER’S RESPONSIBILITY TO ENSURE THAT THE JOB SITE CONDITIONS AND JOBSITE SUBFLOOR ARE ENVIRONMENTALLY AND STRUCTURALLY ACCEPTABLE PRIOR TO THE INSTALLATION OF ANY HARDWOOD FLOORING. NORTHERN WIDE PLANK FLOORING INC. DECLINES ANY RESPONSIBILITY FOR FAILURES OR DEFICIENCIES OF HARDWOOD FLOORING RESULTING FROM OR RELATED TO SUB-FLOOR, SUBSURFACE, OR JOB-SITE ENVIRONMENTAL CONDITIONS. ALL SUBSTRATES MUST BE CLEAN, FLAT, DRY, AND STRUCTURALLY SOUND. • Hardwood floor installation should be the very last step of any construction or renovation project. • Exterior grading should be complete with surface drainage offering a minimum slope of 150mm (6”) in 3000mm (10’) to direct the flow of water away from the structure. All gutters and downspouts should be in place. • All outside doors and windows must be in place. All concrete, masonry, plastering and other “wet” work must be complete and thoroughly dry. • Northern Wide Plank engineered flooring products may be installed below, on or above grade level using recommended installation methods in this guide. • Crawl spaces must be a minimum of 600mm (24”) from the ground to underside of joists. A ground cover of 8mm • Polyethylene film is essential as a vapour barrier with joints lapped 200mm (8”) and taped. The crawl space should have perimeter venting equal to a minimum of 1.5% of the crawl space square meters. These vents should be properly located to foster cross ventilation (see figure 1). Local regulations may prevail. FIGURE 1 • To avoid any moisture-related damages, subfloor must be dry and basements and crawl spaces must be dry and well ventilated. • For below grade installation, ensure that foundations, concrete slab or any adjacent objects are thoroughly leak proof. • Do not install Northern Wide Plank flooring boards in full bathrooms. • Permanent HVAC should be on and operational a minimum of 5 days and maintained between 15-24°C (59-75°F) and a relative humidity of 35%- 55% prior to delivery, during, and forever after installation of the flooring. • If HVAC is not possible at the time of installation the environmental conditions must be at or near normal living conditions between 15-24°C (59-75°F) and at the average yearly relative humidity for the area. 3 NWP INSTALL GUIDE JOB SITE INSPECTION & PREPERATION
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