How To Deck Over a Concrete Stoop

Transforming a plain concrete stoop into an attractive, wood-like surface is easier than you might think. This project is a great way to upgrade your outdoor space without extensive demolition or construction. In the video above, This Old House general contractor Tom Silva explains the step-by-step process of decking over a concrete stoop using PVC trim and composite decking materials.

Materials and Tools Needed

Before starting your project, gather the following materials and tools:

• 1/2-inch plug cutter
• 1/2-inch spade bit
• 3/4-inch chisel
• Circular saw
• Drill
• Foam adhesive
• Hammer
• Hammer drill
• Hot glue gun
• Hot-melt glue
• Masonry anchors
• Nail set
• PVC trim boards
• Wood-composite decking

Preparing the Concrete Stoop

Before applying the new decking, prepare the existing concrete stoop as follows: 

1. Cleaning the surface: Start by thoroughly cleaning the concrete stoop. Remove any dirt, debris, or loose material using a stiff brush and a pressure washer if available. Allow the surface to dry completely before proceeding.
2. Inspecting for damage: Carefully inspect the concrete for any cracks, chips, or other damage. Repair any significant issues before installing the new decking to prevent future problems.
3. Measuring and planning: Measure the stoop carefully, including the sides and top surface. Use these measurements to plan your cuts for the PVC trim and composite decking, ensuring you have enough material to cover the entire stoop.

Installing PVC Trim

The first step in transforming your concrete stoop is installing PVC trim around the perimeter. This creates a clean, finished look and provides a surface for attaching the decking. Here’s how:

1. Cutting the trim: Using a circular saw, cut the PVC trim boards to fit around the stoop. Measure and cut accurately, especially mitered corners.
2. Preparing for attachment: With a 1/2-inch spade bit, counterbore holes in the PVC trim. This creates space for the masonry anchors and allows for a flush finish when plugged later.
3. Attaching the trim: Apply foam adhesive to the back of the trim boards for added stability. Use hot-melt glue on the miter joints to hold them in place temporarily. Position the trim against the stoop, checking for a tight fit.
4. Securing with anchors: Drill holes through the counterbores and into the concrete for the masonry anchors. Insert the anchors and tap them in with a hammer, finishing with a nail set for a secure hold.

Adding Finishing Touches to the Trim

To create a seamless look, you’ll need to conceal the anchor holes in the PVC trim. Follow these steps:

1. Creating and installing plugs: Use a 1/2-inch plug cutter to create plugs from scrap PVC trim. Apply hot-melt glue to the holes and insert the plugs. Once set, use a sharp chisel to trim the plugs flush with the trim surface.
2. Sanding and cleaning: Sand the trimmed plugs and the entire trim surface for a smooth finish. Clean off any dust or debris before moving on to the decking installation.

Installing Composite Decking

Install the wood-composite decking on top of the concrete stoop with these steps:

1. Cutting the decking: Measure and cut the composite decking boards to fit the top of the stoop. Check for a snug fit against the PVC trim for a polished look.
2. Securing the decking: Use the same masonry anchor method to attach the decking to the concrete stoop. Drill counterbores holes in the decking, then drill into the concrete and insert anchors.
3. Concealing fasteners: Create plugs from the composite decking material using the plug cutter. Install these plugs in the counterbored holes with hot-melt glue, then trim them flush for a seamless appearance.

Adding Skirt Boards

Here’s how to add skirt boards to give the stoop a more finished look and cover the side of the concrete stoop:

1. Measuring and cutting skirt boards: Measure the vertical sides of the stoop and cut the composite decking boards to these measurements. Make sure the cuts are straight and match the height of the stoop.
2. Attaching the skirt boards: Use the foam adhesive to attach the skirt boards to the sides of the concrete stoop. Align them with the PVC trim boards at the top to create a consistent appearance.
3. Securing with masonry anchors: Drill holes in the skirt boards and into the stoop using the same method as before. Insert the masonry anchors and secure them with a hammer.

Adding Steps and Railings

Steps and railings improve the functionality and safety of your new decked stoop. Follow these steps if you plan on adding them:

1. Building steps: If your stoop is high off the ground, adding steps can make it more accessible. Use the same composite decking material to construct the steps, checking that they are securely attached and stable.
2. Attaching railings: Railings can add a layer of safety and style to your stoop. Choose railings that complement the look of your decking and make sure they meet local building codes for height and spacing.

Finishing Up

Take these few final steps to create a professional-looking result:

1. Cleaning the surface: Sweep the new decking surface to remove any debris from the installation process.
2. Inspecting the work: Carefully examine all joints, edges, and surfaces to make sure everything is secure. Address any issues you find before applying the finish.
3. Applying protective finish: If desired, apply a protective finish to the composite decking according to the manufacturer’s instructions. This can improve durability and protect against UV damage and staining.
4. Adding decorative elements: Add decorative elements, such as potted plants or outdoor furniture, to improve the look of your new stoop. These additions can make the space more inviting and personal.

Maintaining Your New Decked Stoop

Here are some maintenance tips to keep your decked stoop looking great:

• Apply protective finish: Reapply a protective finish as needed to protect the decking against UV damage and staining.
• Clean the decking: Clean the composite decking regularly to remove dirt, leaves, and other debris. Use a soft-bristle brush and a mild cleaning solution for best results.
• Inspect for damage: Periodically inspect the decking, trim, and skirt boards for any signs of damage or wear. Address any issues promptly to prevent further deterioration.

Alternative Materials and Designs

This project uses wood-composite decking, but you can use an alternative material, such as natural wood or stone tiles. Each material has benefits and drawbacks, so choose the one that best suits your needs and style preferences.

You can also experiment with different design elements, such as patterns, colors, and textures, to make your stoop stand out. Incorporate lighting, planters, or decorative railings to add a personal touch.