Waterproof A Deck Over Living Space: Material, Procedure & Tips

- May 7, 2024

When it comes to outdoor spaces, protecting your furniture and deck from unpredictable weather is crucial. Waterproofing your deck over a living space is essential to prevent water damage. Before starting a waterproofing project, consider the best water-resistant materials and installation practices. Keep reading Capital Deck & stair waterproofing’s blog to get valuable tips for choosing the right materials and methods for waterproofing. By following these tips, you can ensure your outdoor living space remains safe and protected. Learn more about how to waterproof a deck over a living space to safeguard your investment and enjoy the outdoors without worries.

Why Get Your Living Space Waterproofed?

Protecting your living space from water damage is crucial for its longevity and your peace of mind. Water intrusion can lead to costly issues like mold growth and structural deterioration. Waterproofing creates a barrier against moisture, preserving your home’s integrity and aesthetics while increasing its value. Don’t wait for water damage—invest in waterproofing now.

Must Read: How to Restore an Old Deck So It Looks Like New

How Does Waterproofing Work?

Waterproof decking usually consists of these key elements:

Waterproof membrane: Think of this as the superhero layer—it’s the one that does most of the heavy lifting. Typically made from synthetic materials like PVC or TPO, it’s completely waterproof. This membrane sits atop the main structure, meticulously sealed at all seams and edges to ensure no water gets through.

Drainage layer: This layer plays the role of a speedy water evacuator. Its job is to swiftly whisk away any water that manages to sneak through, preventing it from pooling and causing damage.

Protective layer: Picture this layer as the decking’s bodyguard. Before the protective layer comes the drainage layer. Its mission? Shielding against water, pesky UV rays, and other elements that could potentially harm the decking over time.

Top layer: This layer is like the cherry on top. It can be made from various materials like wood, composites, or tiles. Its job is to provide a sturdy, visually pleasing surface that can withstand both heavy foot traffic and exposure to the elements.

Each layer plays a crucial role in keeping water out. They work hand in hand, like a well-oiled team—if one layer fails, the whole waterproof system could be compromised.

Choosing The Best Deck Waterproofing Materials

When it comes to distinguishing between waterproof and water-resistant materials, it’s essential to understand the difference. Waterproof materials are completely impenetrable to water, while water-resistant materials can repel water but still have the potential to absorb it. Now, let’s explore how to waterproof a deck over living space with the right & best waterproofing material.

When selecting the best waterproofing material, remember the following options. Our top choices include.

PVC Decking: PVC decking, constructed from durable plastic, offers exceptional waterproofing to safeguard against water damage. Opt for capped boards for extended deck longevity. Ideal for lasting outdoor beauty and minimal maintenance. Choose PVC decking for a worry-free and long-lasting outdoor living space.

Aluminum Decking: Aluminum decking, while a pricier choice, is favored for its exceptional durability and waterproof nature. However, its installation can be challenging due to cutting difficulties. Opt for this long-lasting option for a sturdy and low-maintenance deck.

Composite Decking: Composite decking, a popular choice for outdoor spaces, combines wood and plastic for durability and style. With a range of designs available, this water-resistant material often features capped boards for added protection. Enhance your outdoor living with composite decking’s beauty and functionality.

Wooden Decking: Wooden decking is a classic and popular choice for outdoor spaces, offering a wide range of design options at an affordable price. While wood is naturally water-resistant, it requires additional treatments to enhance its durability. Explore the timeless appeal of wooden decking for your outdoor oasis.

Deck Membranes And Downspouts

Enhancing your deck with a deck membrane and downspout system is a hassle-free solution for waterproofing your deck roof. These systems, available in materials like vinyl, EPDM, and asphalt, are placed between your deck and substructure to direct water towards downspouts, acting as mini-gutters to channel water away. For flat or low-slope roofs, consider using EPDM for its exceptional waterproofing properties.

By implementing this method, you can significantly reduce the need for ongoing maintenance, ensuring your deck remains waterproof throughout changing seasons. Upgrade your deck with this efficient solution to enjoy long-lasting protection against the elements.

Under-Deck Ceiling Systems

Protect your deck over living spaces with deck membranes and downspouts. These membranes, often PVC-based, block water from seeping through, safeguarding the area below. Downspouts direct water away, preventing pooling. Together, they form a robust waterproofing solution, crucial for preserving your deck and the living space beneath it.

Waterproofing Deck Flanges

For a waterproof deck over living areas, ensure proper installation of deck membranes and downspouts in your under-deck ceiling system. Deck flanges prevent water intrusion, so install them carefully. Securely attach and overlap deck membranes for a watertight seal. Properly position and secure downspouts to prevent water accumulation.

Vinyl Deck Membranes

Ensure effective waterproofing over living spaces by properly installing vinyl deck membranes. Durable and versatile, these PVC-based membranes offer long-lasting protection against water infiltration. When installed correctly, they create a seamless barrier, keeping the living space dry and free from damage. With various colors and textures available, you can customize your deck’s look while maintaining waterproofing. Regular maintenance, including inspections and deck repairs, will extend the lifespan of your vinyl deck membranes.

Waterproof Liquid Deck Coatings

For effective waterproofing, consider waterproof liquid deck coatings like membranes and downspouts. Membranes applied as liquid create a seamless barrier, adaptable to structural movement, preventing leaks. Downspouts divert water, guarding against damage. Proper installation and maintenance ensure lasting protection.

Know How To Waterproof A Deck Over A Living Space With Easy Method : Top Tips

Now, let’s get into how you can waterproof a deck over living space with an easy method. First, gather your materials and plan them out, then prepare the substrate before installing metal flashings. Finally, apply the deck membrane to ensure a waterproof seal over your living space.

Step 1: Gather Your Materials And Plan Them Out

Plan materials meticulously for waterproofing your deck over living space. Gather essentials like waterproofing membrane, seam tape, adhesive, and flashing, ensuring enough coverage. Equip yourself with tools like a utility knife and roller. Consider deck specifics for a streamlined, successful project.

Step 2: Substrate Preparation

Prepare the substrate thoroughly by cleaning it of debris and contaminants. Sweep the surface to remove dirt and use a pressure washer for a deep clean, paying attention to corners and edges. Repair any cracks and ensure a smooth surface before waterproofing.

Step 3: Install Metal Flashings

Before waterproofing, ensure proper installation of metal flashings for essential protection. They prevent water infiltration and direct it away from vulnerable areas. Start with drip edge flashings along edges, then seal joints with flashing strips. Secure counter flashings to enhance water resistance. Properly installed metal flashings ensure long-term durability and waterproofing effectiveness.

Step 4: Apply The Deck Membrane

Now, proceed by applying the deck membrane carefully, ensuring it overlaps flashings and seals tightly at seams and edges. Consider a second coat for added protection. By following these steps diligently, you’ll create a durable, waterproof barrier, safeguarding your living space below.

Key Considerations For A Leak-Proof Deck

For a leak-proof deck, several key considerations must be addressed.

Deck Surface To Slope Away At ¼ Inch Per Foot: Firstly, ensure the deck surface slopes away at a quarter-inch per foot to prevent water pooling.

Proper Flashing Using Deck-Compatible Material: To ensure a leak-proof deck, consider utilizing deck-compatible material for proper flashing. Proper flashing with deck-compatible material is essential to seal vulnerable areas effectively.

Proper Drainage Using Gutters: Consider installing gutters as a key element for achieving a leak-proof deck over living space. Proper drainage is crucial to prevent water from pooling on your deck, causing potential leaks into the living space below.

For a leak-proof deck, prioritize these key factors: slope the deck surface away at ¼ inch per foot, use deck-compatible material for proper flashing, and install gutters for effective drainage. Additionally, don’t forget about the capital deck and stair waterproofing for comprehensive protection. Ensure your deck stays dry and durable.

Frequent Asked Questions About Waterproofing A Deck Over Living Space

1. Is It Possible To Waterproof An Existing Deck?

Yes, it’s possible to waterproof an existing deck by applying a waterproofing membrane or coating over its surface, ensuring proper sealing and protection against water intrusion.

2. What Is The Cost to Waterproof A Deck?

The cost to waterproof a deck varies depending on factors like deck size, chosen waterproofing method, and labor costs. On average, it can range from a few hundred to several thousand dollars.

3. How Long Does It Take To Waterproof A Deck?

The time it takes to waterproof a deck depends on factors such as the size of the deck, the chosen waterproofing method, and weather conditions. Typically, it can take anywhere from a few days to a couple of weeks to complete the process.

4. Waterproofing Deck Over Conditioned Space, How?

To waterproof a deck over conditioned space, start by selecting a deck membrane material like vinyl or EPDM. Prepare the substrate thoroughly, then install metal flashings for added protection. Finally, apply the chosen deck membrane to ensure durability and waterproofing.

5. Exterior Deck Over Living Space But How to Waterproof?

When waterproofing over an exterior deck above living space, ensure proper support, slope, and flashing. Follow these steps for waterproofing: use approved roofing membrane, add drainage mat, install a mud bed with reinforcing wire, apply uncoupling mat, seal seams with right material, and tile. Ensure proper slope away from the house. Plan for spring installation for optimal results. Visit us for detailed instructions.

6. Sealing/waterproofing a Deck Over Living Space Solutions

Ensure your deck over living space is properly sealed and waterproofed by installing a heavy rubber roof system over sloped insulation, followed by a wood deck on sleepers. It’s crucial to have a professional contractors this complex task due to the technical expertise required. Additionally, consider a roofing system underneath the wooden decking, such as rubber or bitumen, to enhance protection. Prioritize the integrity of the roofing system to safeguard both the wood and underlying structure effectively.

7. How to Water Proof Your Second-Story Deck?

To waterproof your second-story deck, consider applying a high-quality sealant, ensuring proper drainage, and using waterproofing membranes. Regularly inspect for any signs of damage or wear to maintain a durable and protected deck.

8. What Are the Best Tips for Waterproofing a Deck Over a Living Space?

To effectively waterproof a deck over a living space, start by selecting high-quality materials like vinyl deck membranes or waterproof liquid coatings. Next, ensure you hire a skilled deck builder for proper installation. Additionally, check if your chosen decking material is approved for roofing purposes. These steps will help protect your deck and living space from water damage, ensuring durability and longevity.

Commercial Deck Requirements and Recommendations

- May 12, 2021

Whether it’s an outdoor dining area or a simple entryway, adding a deck to your commercial property is a great way to add value and grow your business.

Unlike residential decks, however, commercial decks are subject to additional building requirements and regulations to help ensure people’s safety. As a result, designing and building a commercial deck is somewhat more involved than many might think, given the addition of minimal requirements for construction types, means of egress, and even lighting.

Thankfully, commercial deck requirements are fairly easy to navigate with help from the International Building Code. Read on to learn more about what’s involved and how you can build the perfect commercial deck that fulfills both code requirements and customer demands.

Commercial vs. Residential Decks

Though commercial and residential decks often look different, their biggest differences are the codes and regulations that determine their construction. Here, where the International Residential Code (IRC) regulates how residential decks and buildings are built, the International Building Code (IBC) regulates their commercial counterparts.

While both the IRC and IBC share similar basic requirements for structural integrity and other engineering factors, the IBC adds additional measures to accommodate the extra capacity and foot traffic expected from commercial decks. Most of these measures are in place to make buildings and decks easier to exit in the event of an emergency.

Beyond the IBC and other baseline regulations, there are several other commercial deck requirements to consider when designing a commercial deck. In addition to layout, size, and aesthetic design, you may also want to consider waterproofing or other surface treatments, depending on your deck’s intended purpose. A hotel pool deck, for example, would probably require a waterproof coating for safety and water damage protection.

Commercial Deck Requirements

As mentioned in the previous section, most commercial deck requirements are regulated by the International Building Code (IBC). While the IBC’s complete requirements are beyond the scope of this guide, the commercial deck requirements covered here should serve as a solid baseline. Even so, you’ll likely want to employ a design professional well-versed in the IBC to help ensure that you meet these requirements.

Type of Construction

According to the IBC, the “type” of construction refers to the materials used to build commercial decks and structures. The IBC breaks down construction materials into five types, depending on their combustibility and the fire resistance of their assemblies:

• Type I: Fire Resistive
• Type II: Non-Combustible
• Type III: Ordinary Construction
• Type IV: Heavy Timber
• Type V: Wood Frame Construction

Though it’s possible to use each type of material for commercial deck construction, the deck’s use, capacity, and means of egress (exits) will determine what materials can be used. For example, in Type I and Type II buildings built from fire-resistive and non-combustible materials, decks that don’t serve as a required exit can still be built from fire-treated wood with untreated wood hand railings.

The details don’t stop there, however: Even for Type III, Type IV, and Type V decks built from combustible materials such as wood, their final assembly may still need to be fire-resistive in some way. In summary, you can build a commercial deck for nearly any material as long as it satisfies IBC requirements—all the more reason to check with a registered design professional before building.

Occupancy Type and Capacity

The occupancy type and capacity of your deck is another key factor in determining a commercial deck’s materials and design. While the IBC defines several occupancy types, those most related to commercial deck requirements include:

• Business (B)
• Assembly (A)
• Mercantile (M)
• Residential (R)

Many commercial decks fall under occupancy type A, which includes everything from restaurants to swimming pools and stadiums. Once you know your occupancy type and the intended capacity/load of your space, the IBC will define maximum floor area allowances per person, required strength, and other important design considerations.

Occupancy type and load also determine the number of exits required, where a deck might potentially serve as one. For occupancies over 50, for example, the deck must include exit signs for the deck exit and pathway lighting, among other considerations.

Means of Egress

Your deck’s “means of egress” refers to its exit(s), such as attached stairs, ramps, or buildings. How exits are designed is a crucial safety consideration, as an emergency situation may require large amounts of people to safely exit the deck via stairs or a ramp in as little time as possible.

The design and number of exits is ultimately determined by the size and occupancy of your deck; however, all decks must have at least one accessible exit that isn’t blocked by fences, gates, and tripping hazards. Exit walkways must also be slip-resistant, making waterproof coatings or non-slip surfaces crucial for deck construction.

Other Requirements and Considerations

The IBC outlines several other commercial deck requirements, including lighting and elevation changes, which both affect the design of your deck’s means of egress. For example, a deck with a high elevation may require a multi-part staircase or ramp, and all exits must be illuminated to a certain degree.

Note that the requirements outlined here fall outside the scope of aesthetic preferences, local HOA requirements, and so on. You may encounter additional commercial deck requirements during the design and construction process; however, you’ll probably want to consider a few other safety recommendations as well.

Deck Safety Recommendations

Though the IBC is a great baseline for ensuring safety, there’s always more you can do. Safety isn’t just important during an emergency; it’s also important for ensuring that your customers and employees are able to use the deck on a regular basis without risk of slipping, falling, and so on.

Deck finishing is one important way to guarantee your deck’s safety, appearance, and long-term durability. Regardless of the material, water infiltration poses the biggest threat to your deck’s safety and structural integrity, making waterproof coatings an essential part of deck construction.

For more information on our waterproof coating services, call the Capital Deck & Stair team at (888) 508-2966.