How do I safely remove an old deck in Fredericton NB?

Start by disconnecting any electrical connections, then work from the top down — remove decking boards first, then railings, then joists, then beams, and finally posts and footings — and always assume the structure is weaker than it looks, because decades of Fredericton freeze-thaw cycling will have compromised fasteners and wood integrity in ways not visible from the surface.

Before you touch the structure itself, check whether you need a demolition permit from the City of Fredericton. Removing a deck attached to the house or over a certain size typically requires notification to the building department, particularly if the deck has electrical wiring or if you intend to build a replacement. The permit is inexpensive and protects you from complications during future building permit applications.

Disconnect all electrical before beginning any physical demolition. If your deck has outlets, post cap lights, stair lighting, or a hot tub connection, these circuits must be de-energized at the panel and confirmed dead with a voltage tester. Do not simply flip a switch — lock out the breaker and test at the fixture. If wiring runs through or under the deck to other structures, you will need an electrician to reroute those circuits before demolition begins.

Gather your safety equipment before starting. You need safety glasses, heavy work gloves, steel-toed boots, hearing protection for reciprocating saw work, and a dust mask rated for treated lumber. If the deck was built before 2004, the wood is almost certainly CCA-treated, which contains chromated copper arsenate. CCA wood must never be burned, and the sawdust should not be inhaled. Bag any sawdust from cutting CCA lumber and dispose of it with the demolition waste.

Begin removal from the top. Pry up decking boards using a flat pry bar, working from the ends toward the center of each board. Old screws in Fredericton decks often snap rather than back out due to corrosion, so a reciprocating saw with a metal-cutting blade slipped between the decking and joist is frequently faster than trying to extract every fastener. Once the decking is removed, take down the railing system, then remove rim joists and joists. Joists connected with hangers can usually be lifted out once you pry the hanger nails, but toenailed joists may need to be cut free. Have a helper stabilize each joist as you disconnect it — a 4.8-metre joist can weigh 20 to 30 kg and will swing unpredictably when one end releases.

Ledger and Substructure

The ledger board removal requires particular care. It is bolted through your home's rim joist, and removing it will leave holes in the building envelope that must be sealed immediately. Back out the lag bolts carefully, and have self-adhesive flashing tape ready to cover the penetrations the same day. Leaving open bolt holes through the rim joist overnight during a Fredericton rainstorm can introduce significant moisture into the wall cavity.

For posts set in concrete footings, you have two options. If the footings are above grade, you can usually rock the post free or cut it at the footing level. If footings extend to the 1.2 to 1.5-metre frost depth as they should in Fredericton, excavating them fully is laborious and usually unnecessary unless the new deck requires different footing locations. Most builders cut the post flush with the footing and bury the concrete.

Disposal of demolition waste goes to the Fredericton Region Solid Waste facility. A typical single-storey deck demolition generates 1 to 2 tonnes of waste, which usually warrants renting a 10 or 15-yard dumpster bin for $350 to $500 with disposal included. Budget a full weekend for a two-person crew to demolish an average 3.6 by 4.8-metre deck.

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