Is It Possible? Installing Composite Decking Over Existing Deck

When it comes to updating your outdoor living space, you might wonder, "Can you put composite decking over existing deck?" The short answer is yes, but with some considerations. Let's delve into the possibilities and factors to keep in mind when contemplating this approach.

First, let's discuss why you might want to cover your existing deck with composite decking. Perhaps your current deck is made of wood and has seen better days, is damaged, or you're simply looking to upgrade to a low-maintenance material.

Understanding Composite Decking

Composite decking is a material made from a mix of recycled plastic and wood fibers, creating a durable, long-lasting, and eco-friendly option for your outdoor structures. It's resistant to rotting, fading, and insect damage, making it a popular choice among homeowners.

Before you proceed, ensure your existing deck is sound and safe. Any structural issues will need to be addressed before laying composite decking over it.

Structural Soundness Checks

Inspect your existing deck for signs of rotting, warping, or instability. If these issues are present, rectify them before installing new composite decking. A structurally sound base ensures your new composite decking will last and remains safe to use.

It's also crucial to consider the spacing and spacing between the existing deck boards. If they're too wide, you'll need to install blocking or replace the boards to create a stable surface for the composite decking.

Preparation and Surface Leveling

Once you've ensured your existing deck is structurally sound, prepare the surface. Remove any nails or screws sticking out, fill gaps, and ensure the surface is clean and free of debris. If your existing deck is uneven, you may need to level it using a self-leveling compound or by adjusting the joists.

Before proceeding, also check local building codes and homeowners association (HOA) regulations to ensure you're allowed to install composite decking over your existing deck.

Benefits and Considerations of Overlaying

overlaying your existing deck with composite decking has its pros and cons. Let's look at a few:

Benefits of Overlaying

1. Cost-Effective: Overlaying can save you money on demolition and disposal costs. 2. Time-Saving: You can skip the time-consuming process of dismantling your existing deck. 3. Eco-Friendly: By reusing your existing deck structure, you're reducing waste.

Considerations of Overlaying

1. Heat Buildup: Dark-colored composite decking can absorb heat, making the surface hot underfoot, especially in direct sunlight. 2. Moisture Trapping: If not adequately ventilated, moisture can build up between the layers, leading to mold, mildew, or rot. 3. Weight and Thickness: Ensure your existing deck structure can support the additional weight and thickness of composite decking.

While overlaying your existing deck with composite decking can be a great way to update and prolong its life, it's essential to weigh the pros and cons and consult with a professional if you're unsure. With proper installation and care, your composite decking can provide a beautiful, low-maintenance outdoor living space for years to come.