Moisture, expansion, contraction and sun and weather breaks down wood fibers. When foot traffic is added, it is a sure bet that steps show signs of deterioration, frequently revealing themselves in splits and cracks. Damage to wood steps is inescapable no matter how frequently you applied sealant. Other problems occur when steps warp or twist, causing fasteners to lift or loosen. Fix damage with waterproof resin glue. It dries hard as glass to fill and bonding splits and cracks.
Tap on the steps using a hammer. If the step bounces, rattles or moves, then find loose nails and drive them down using the hammer. Replace loose screws with fresh ones with a threaded drill.
Chip or dig rotten wood working with a chisel — if the rot doesn’t penetrate all the way through the step. Repeat the procedure removing loose rotten wood using a wire brush. Trim off any noticeable splinters using a chisel.
Mix glue powder with water after instructions printed on the package, as each product has slightly different instructions. Insert the tip of a chisel to any open cracks or splits. Pry the crack apart using the chisel; fill and saturate the break with the glue using a brush to work it into the crack. If the crack is too narrow for the chisel or a thick-bladed putty knife, then force the glue to the compromise with the brush.
Apply wood clamps across the cracks, if at all possible. Tighten the wood clamp so that the crack closes. Allow the glue to dry immediately and remove the flames. Check the cracks. If the glue recessed when it dried, apply more glue to fill the depressions. Allow the glue to dry immediately and repeat if necessary until the glue is flush with the step.
Scrape dried glue in the step using a glue scraper to make it flush with the measure’s surface. Sand the steps having an orbital sander using 100-grit sandpaper.
Apply waterproof wax or wax.