How much do deck screws and fasteners cost for a 300 square foot deck in NB?

For a 300 square foot deck in New Brunswick, expect to spend $150-400 on screws and fasteners, depending on your material choices and whether you're building the frame or just the decking.

The cost breakdown depends on what you're fastening. For decking screws only (if you're just replacing deck boards), you'll need about 600-750 screws at roughly $0.15-0.35 each, totaling $90-260. For a complete deck build including framing, add joist hangers ($3-8 each), lag bolts for the ledger board ($15-25 each), and carriage bolts for beam connections, bringing your total fastener cost to $250-400.

Decking screw options include basic coated steel screws ($90-120 for 300 sq ft), stainless steel screws ($180-260), or premium composite-specific screws with color-matching heads ($200-300). In New Brunswick's humid Maritime climate, investing in stainless steel or high-quality coated fasteners is smart money — they'll outlast your deck boards and prevent unsightly rust stains that are common with cheaper fasteners.

For structural fasteners, you'll need galvanized or stainless steel joist hangers ($3-8 each, need 15-25 for a 300 sq ft deck), galvanized lag bolts for ledger attachment ($15-25 for a set of 6), and galvanized carriage bolts for beam connections. Don't skimp on structural fasteners — New Brunswick's freeze-thaw cycles put extra stress on connections.

Hidden fastener systems like Trex Hideaway or TimberTech CONCEALoc cost more upfront ($1.50-3.00 per square foot) but create a cleaner look with no visible screws. These work with grooved composite and some hardwood decking.

Where to buy in NB: Home Depot and Rona carry basic options, while lumber yards like Maritime Building Supply (Moncton), Kent Building Supplies, or local suppliers often have better pricing on bulk quantities and professional-grade fasteners. Many deck builders get 10-15% better pricing than retail.

Pro tip for NB conditions: Buy 10% extra fasteners than calculated — you'll inevitably hit knots, need to re-drill holes, or discover you need a few more joist hangers once framing begins. Also, avoid mixing fastener types (stainless with galvanized) as this can cause galvanic corrosion in our salty Maritime air.

If you're hiring a deck builder, fasteners are typically included in their material costs, but it's worth asking what grade they're using — especially for the structural connections that keep your deck safely attached to your house through our harsh NB winters.