Huber Technical Information
Using a construction adhesive on floor joists as well as at T and G joints will help increase the stiffness of a floor system. It will also help eliminate floor squeaks and nail popping. For AdvanTech subflooring and sheathing panels, a solvent or polyurethane based construction adhesive should be used. To prevent skinning of the adhesive prior to attachment of the panel, only enough adhesive should be spread for one or two panels. A quarter inch bead of adhesive should be applied to all joist surfaces. For wide surfaces, use a double bead or a serpentine pattern.
FLOORING INSTALLATION: Glue with nails or screws should be used to insure greater floor stiffness. Gluing helps eliminate nail-popping and floor squeaks. Use only solvent-based or polyurethane adhesives which conforms to industry standards AFG-01, and follow manufacturer's recommendations. Before each panel is placed, a line of adhesive should be applied to the top of the joist. A min. 1/4" bead of glue is recommended. Fasteners should penetrate framing members at least 1". Apply fasteners 3/8" from panel edges. Space fasteners 6" o.c. on supported edges (4' ends) and 12" o.c. at intermediate support locations. Insure that all corners are securely fastened. Note: 1-1/8" panels spaced 48" o.c. should be fastened 6" o.c. at intermediate support locations. Use 8d ring shank nails or screw shank nails for panels 3/4" thick or less, and 10d ring shank nails or screw shank nails for thicker panels.
SHEATHING INSTALLATION: Use minimum 6d common nails for panels 1/2" or less. Use minimum 8d common nails for panels 5/8" to 1". Other code approved fasteners may be used when roof construction does not need to meet diaphragm or shearwall strength criteria complying with HUD/FHA UM 25d. Apply fasteners 3/8" from panel edges. Space fasteners 6" o.c. along supported edges, 12" o.c. at intermediate supports. Ensure that all corners are securely fastened. For 48" o.c., all fastener spacing should be 6" o.c. Check local code provisions for high wind areas. Note: AdvanTech sheathing is not recommended for residential siding.
In order for the maximum span rating to be used for sheathing panels 3/8" thick and 15/32" thick and thicker, edge support must be used for unsupported edges. Edge support includes T and G edges, panel clips or lumber blocking. If panel clips are used for edge support, one between each support is sufficient. If supports are at 48" o.c., then 2 clips between supports are needed. Some, but not all panel clips have out-dents to provide the recommended 1/8" gap at edges. Although panel clips are not always needed, some code jurisdictions require their use. Check with the local building department in your area for any panel clip requirements.
A common misconception is T and G flooring panels (Floor Span) cannot be used for roofing applications. Table 2 in ER-5637 NER-133 lists allowable live loads for Floor Span panels used for roofing applications. It should be noted that sheathing panels (Sheathing Span) used for roofing applications have different design capacities than Floor Span panels. Note: Flooring panels are sanded and may not provide adequate slip resistance.
There can be many causes of discoloration of vinyl floors. Extraneous materials on the subfloor such as oils, inks and solvents have been known to cause stains in vinyl flooring. Adhesives used to glue floor decking to joists and also used in tongue and groove joints can also lead to vinyl staining. High moisture conditions, usually resulting from inadequate crawl space ventilation, may also lead to staining of vinyl flooring. To help minimize discoloration, follow vinyl manufacturers recommendations and provide sufficient ventilation in crawl space areas.
A minimum 1/4" plywood underlayment is recommended for installing vinyl tile or sheet vinyl over AdvanTech. Due to the wide variety of vinyl and adhesives available, it is best to consult with vinyl flooring manufacturers for installation recommendations.
Although rare, sometimes a few strands do not get fully coated with resin during the blending process. Since there is little resin holding the strand to the board, exposure to moisture or some other external influence will cause the strand to release. This normally affects the surface of the panel and rarely extends into the board deeper than one or two strands. Loose strands may require some additional sanding and possibly filling prior to finish floor application, but is so minor that it will generally not affect the strength of the product.
AdvanTech panels can be left natural, stained, varnished or painted with oil or epoxy based paints or oil based primer and latex paint. Water seal is not recommended. AdvanTech panels are not recommended for exterior siding or other applications that are permanently exposed to the weather.
There are two methods used to attach AdvanTech panels to concrete slabs. Both methods require the preparation of the slab. Slab Preparation Cover the slab with minimum 4 mil (6 mil preferred) polyethylene sheeting. The polyethylene sheet should be glued to the slab with an adhesive that will bond to both concrete and plastic. All joints in the polyethylene sheeting should be lapped a minimum 4". These laps should also be glued to ensure an adequate moisture seal. The plastic should extend up sides of the walls a few inches. Once the AdvanTech sheathing is installed, the excess plastic can be trimmed flush.
Method 1 - Application direct to slab
• It is recommended that a square edge panel be used for this method.
• After preparing the slab as described above, place panels directly on polyethylene sheeting.
• Space panels 1/8" at edges and ends.
• Fasten panels with masonry nails, concrete fasteners or powder-actuated fasteners.
• Place fasteners 3/8" from panel edges.
• Space fasteners 6" o.c. at panel edges and 8" o.c. in the field.
Method 2 - Application to a joist system
• It is recommended that a T and G panel be used for this method.
• After preparing the slab as described above, install a joist system with 2x4's put on edge. Include rim joists to tie the framing together. The recommended joist spacing is 16" o.c.
• Lay panels on joist system with long dimension across joists. All panels should cover at least 3 joists.
• Space panels 1/8" at 4-foot ends. The T and G edge is self spacing.
• Use a minimum 8d ring-shank or spiral shank nail.
• Place fasteners 3/8" from panel edges.
• Space fasteners 6" o.c. at panel edges and 12" o.c. at intermediate supports.
AdvanTech panels are manufactured with a highly moisture resistant resin and are guaranteed not to require sanding due to moisture absorption. With other OSB commodity products, a certain amount of edge swelling can be expected when subject to direct exposure to moisture. Once the structure is enclosed and the panels are acclimated, any joints that have swollen can be sanded to provide a smooth surface for the finished floor covering. The Huber Engineered Woods no-sanding-due-to-moisture guarantee is for 500 days after installation. See warranty for details.