Galvanized screws are steel screws dipped in a hot galvanized coating to prevent moisture from rusting the screws. Shop Products; Register; My Account; Chat ; Nail Gun Network Articles; Free Shipping on tools * 1.888.720.7892. What type of screws should I use for securing a subfloor? Construction adhesive and ring nails should be fine. The galvanized coating resists the chemicals that treat lumber that would eat through standard steel screws. The ICC-ES ESR-1472 code-listed Strong-Drive WSNTL Subfloor screw has a unique thread pattern that allows for quick and seemingly effortless installations. Screws: It doesn't sound like you're reattaching the entire floor; this is more like strategic intervals to solidify the fastening. … With withdrawal and pull-through values that exceed those of 10d nails, the holding power of WSNTL screws reduces the gaps between the joist and subfloor that cause floor squeaks. The typical screw spacing for underlayment, NOT sheathing is 4", +/- on the edges and 6", +/- in BOTH directions in the middle. Countersink the screw head into the subfloor. The underlayment is usually stapled to the sub floor with a pneumatic stapler, but can be fastened through the subfloor into the joists with nails or screws instead. The joists have already shrunk from age and should hold nails no problem. Post Cancel. Screwing it down wouldn't hurt. Hardwood. Nails for Subfloor Although you can secure ¾-inch plywood sheets to the joists in a subfloor with long nails, you don't generally need extra-long nails for the floor to stay in place. Put a nail every 8-10 inches on the surface. You can fasten SurePly ® plywood underlayment by selecting one of the following options: Galvanized coated chisel-point staples with a 1/4" maximum crown or flathead wood screws treated with a moisture-resistant coating (such as galvanized or zinc). Glue and screw is popular for more reasons than just rhyming; You're going through this effort to make it right. $0.00. As the screws arrive with a threaded body, they become more challenging to remove from the wood. Underlayment goes over the subfloor. #8 x 1-3/4 in. Screws are slower and if you did use screws, you would have to ensure that all the heads were countersunk below the surface. The floor was constructed by first sistering new joists to the old ones, nailing and gluing 1x4 stock across the joists about 8-10" … I'd use Spax or GRK screws. Remember not to nail towards the last 10″ of the tongue side until the next sheet is installed. If there is an application where I have to use screws in a floor (such as in decking), then I also use a type that lock-in so they don't back out from years of vibration. When adding underlayment to that you can use a 1-1/4" screw, nail or staple. I'd use Spax or GRK screws. In this installation, we used Portable Cable’s Round Head framing nailer. x 1/9 in. Underlayment and Subfloor Screws provide strong and long-lasting holds for securing both underlayment and subfloor in subfloor installations. O'BrienConstruction. This goes through several mistakes made while working on the second floor subfloors - culminating in a long rant about the drawbacks of Philips screws. 10-29-2007, 06:14 PM. In this blog post, we will discuss the proper specifications to follow when selecting the fasteners. With its dedicated pneumatic coil nailer, the tetraGRIP™ Sub-Floor Fastening System drives as fast as a nail and has the holding power of a screw. The builder felt it was only necessary to use about 10 or 12 nails for each 4 x 8 sheet of sub floor . If there is concern about holding power, then draw nailing lines and increase the nailing schedule to 6" OC all over each subfloor panel. 1½" X .113" 15° Plastic Sheet Coil Combo Trim Head BNS PPG1500™ - HSNS112113THC/T $ 120.71 This has all but eliminated the many many squeaks we had. Thorough fastening of the underlayment panels is key to a successful installation. You may want to use a 1/2" underlayment to get a better result. If your subfloor is only 3/4", I would address that first since this seems scant. Realtor.com recommends an 8d nail, which is roughly 2½ inches, to pass through the plywood and bury nearly 2 inches of the nail in the joists below. The tetraGRIP™ Subfloor Fastening System is a technological breakthrough in subfloor fastening for the residential builder. Your nail/screw rate is not as important as if you were attaching a new subfloor from scratch. I always set bowed sheets of Advantech aside 'cuz I don't trust ringshanks to draw it tight. The code-listed Strong-Drive WSNTL Subfloor screws are ideal for fastening subfloor, sheathing, sill plate and stair applications using the Quik Drive auto-feed screw driving system. These nails work themselves loose as a subfloor ages and sinks, despite retaining its structural integrity. Yellow Subfloor Collated Screw (1000-Count) 2 in. So if you underlayment is 5/8" or 3/4" thick you can use 1 5/8" coarse thread screws. The grip strength is the capability of the fastener to hold into the wood. The sheets are anchored to the joists with nails or screws driven 6 inches apart, and they are secured to joists across the "field" of each sheet with screws or nails driven every 8 inches. Instead, fasten the plywood underlayment panels with staples, ring-shank nails or screws. Construction adhesive and ring nails should be fine. Nails for Subfloor Nails approximately 2 inches in length pass through the ¾-inch plywood and still provide plenty of length to secure the plywood to the joists. Drywall screws have a tendency for the heads to snap off at the wrong time. With hardwood floors, drive ring-shank or cement-coated flooring nails into the seams between boards. Nails are often preferred for structural joining, including framing walls, because they are more flexible under pressure, whereas screws can snap. We recommend screws, but other fasteners can be used if needed. To fix a floor covered with deep-pile carpet, drive a wallboard screw through the carpet and pad into the floor joist. Nails approximately 2 inches in length pass through the ¾-inch plywood and still provide plenty of length to secure the plywood to the joists. #2 Phillips, Bugle-Head, DWC Collated Drywall Screw (2500-Pack) Price $ SHOP BY PROJECT … This will give you the location of the floor joists. On the other hand, shear strength is the pin’s capability to handle the load on it from slides. Coarse Galvanized Square Decking to Wood DuraSpin Collated Screw (1000-Pack) #6 x 1-5/8 in. As I have redone the floors in other rooms I have snapped chalk lines in a 12 x 12 grid and screwed down the sub-floor 12" OC in the field, 6" OC on the perimeter. You could use the same screws for thinner underlayment, but the risk of hitting something unseen below the floor grows. When that happens you've created a gap between the joist and subfloor that's a bitch to pull tight. Other reasons- Screws are more brittle than nails. In the comparison of the nails and screws, the main difference is grip strength and shear strength. Subfloor screws Most of the quality home builders in my area use Grabber Screws and a Superdrive collated screw gun for a speedy installation. VIEW CART. CALL CART ACCOUNT. You can also fasten underlayment with galvanized or coated screws or nails. You can snap a chalk line across the joists to make nailing simpler. I've read anything from ring-shank nails to just regular wood screws. Simply look for the nail heads in the subfloor. Screws are preferred over nails for subfloor and underlayment installations as they provide strong and tight connections that help prevent the floor from squeaking. Screwing it down wouldn't hurt. Many installers apply a bead of construction adhesive across each joist before laying the subfloor sheets down. Use nails for framing and screws for finishing – sheathing and subfloor. We prefer 2 inch subfloor nails with reverse threads and coated in glue. The C8175L3YZ is a #8 by 1-3/4" zinc coated fastener and is the screw of choice. Nail Gun Depot offers a variety of decking and subfloor fastening tools, including screw guns and framing nailers. Specifically designed for high moisture areas, galvanized screws are often used on porch floors and any area that the screw attaches plywood to treated lumber. The easiest and best fastening option is galvanized staples driven with an air-powered stapler (available for rent at home centers and rental outlets). Collated Scrails, nails and screws available. Improvise, Adapt, Overcome. The joists have already shrunk from age and should hold nails no problem. Comment. Although screws can be used for framing, the Building Inspector may not agree – most building codes still identify 10d and 16d nails as the norm, not screws. Veteran Contributor Join Date: Nov 2006; Location: Swansboro, NC; Posts: 1550 #9. Do not use drywall screws. The advent of the Phillips-head screw in the 1930s changed everything and began the slow movement from hammering nails to driving screws. CHECKOUT. Login; Register; ITEMS IN CART: 0. Phillips screws were … Never use adhesive on the sub-floor to attach the plywood underlayment. Underlayment goes over the subfloor. Subfloors go directly over the joists. Separate wooden bridging members to eliminate noise problems. I am worried about bounce between joists with a mere 3/4". 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subfloor nails or screws

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