Quick Answer

Resealing your wood deck is a crucial maintenance task that protects it from the elements, prevents rot, and keeps it looking great. The process involves cleaning, preparing the existing surface, and applying a suitable deck sealant. Proper application ensures long-lasting protection and enhances the longevity of your outdoor living space.

The Problem

Over time, UV rays, rain, snow, and general wear and tear degrade a deck's protective sealant. You'll notice signs like water soaking into the wood instead of beading up, discolored or graying wood, mildew growth, and even splintering. Ignoring these signs leads to premature wood rot, structural damage, and a significantly shortened lifespan for your deck. Effectively resealing your deck prevents these issues, saving you costly repairs down the line.

Step-by-Step Fix

Safety Note: Always wear appropriate personal protective equipment, including gloves and eye protection, when working with deck cleaners and sealants. Ensure good ventilation if working in an enclosed area, and keep children and pets away from work areas.

1. Clear and Inspect the Deck: Remove all furniture, planters, and debris from the deck. Thoroughly sweep the surface. Inspect the wood for any loose nails, screws, or splintered boards. Hammer down loose fasteners and replace any severely damaged or rotted boards.
2. Clean the Deck: Apply a deck cleaner specifically designed for wood. Follow the manufacturer's instructions for application and dwell time. For stubborn stains or mildew, you may need to use a stiff brush. Rinse the deck thoroughly with a garden hose or a pressure washer on a low setting (no more than 1200 PSI) to avoid damaging the wood. Allow the deck to dry completely, which can take 24-48 hours depending on weather.
3. Sand Rough Spots (Optional but Recommended): Lightly sand any rough areas, splinters, or raised grain with 80-120 grit sandpaper. This creates a smoother surface and helps the new sealant adhere better. Clean off any sanding dust.
4. Mask Off Adjacent Surfaces: Use painter's tape and plastic sheeting to protect siding, trim, plants, and anything else you don't want to get sealant on.
5. Apply the Sealant: Stir the deck sealant thoroughly before and periodically during application. Apply a thin, even coat using a roller, brush, or pad applicator. Work in small sections, following the wood grain. Avoid pooling or excessively thick coats. If applying a second coat (check product instructions), allow the first coat to dry completely, typically 2-4 hours.
6. Allow to Cure: Let the sealant cure for the time recommended by the manufacturer, usually 24-48 hours, before moving furniture back or allowing heavy foot traffic. Full cure time can be longer.

Common Causes

The primary cause of a failing deck sealant is exposure to the elements. UV radiation breaks down the sealant