What Should I Put Between Wood and Concrete? Protecting Your Investments in 2023

Are you planning to build a deck, patio, or even a new home? If the answer is yes, then you’ve probably come across the dilemma of what to put between wood and concrete. It’s a crucial consideration because failing to protect the wood can lead to rot, moisture damage, and even costly repairs down the line. But fear not! In this blog post, we’ll delve into the various options you have to safeguard your investment.

From sills plates to furring strips, we’ll explore whether pressure-treated wood can touch concrete, the role of moisture barriers, and even how to seal gaps effectively. So, whether you’re wondering if you can glue furring strips to concrete or if caulking between wood and concrete is a viable solution, we’ve got you covered. Join us as we uncover the best practices and techniques to keep your wood safe from the clutches of moisture and deterioration in 2023. Let’s get started!

What should I put between wood and concrete?

What to Use Between Wood and Concrete: Finding the Perfect Barrier

So, you’ve got yourself a woodworking project that requires some concrete work. You’re excited to bring these two rugged materials together, but there’s a problem: wood and concrete don’t exactly bond like long-lost friends. They need a mediator, a peacekeeper, a divine intervention in the form of a barrier. But what, oh what, should you use between wood and concrete? Fear not, fellow DIY enthusiast, for I have some answers that will make your project rock (or in this case, wood)!

Wood and Concrete: An Odd Pair That Needs Some Separation

Before we jump into the possible solutions, let’s understand why wood and concrete need a little distance in the first place. You see, concrete is a beastly material that loves moisture. It’s like a sponge, eagerly sucking in any water it can find. Wood, on the other hand, despises moisture. It’s like a fussy cat that avoids anything damp.

When wood and concrete come into direct contact, moisture from the concrete can wreak havoc on the wood. The wood may start to rot, warp, or suffer from a serious case of the moldy blues. To prevent this disastrous union, we need to find something that keeps the peace between these two quarrelsome materials.

Enter the Barrier, the Unsung Hero

Now, it’s time to introduce the star of our show: the barrier. Yes, dear readers, this unassuming mediator is the key to a successful wood and concrete rendezvous. Let’s explore a couple of options that can save the day:

1. Plastic Sheeting: The Humble Protector

Plastic sheeting is like a superhero cape for your project. It comes in various thicknesses, but for this holy matrimony between wood and concrete, a 6 mil (that’s shorthand for 6 thousandth of an inch) thick plastic sheeting will suffice. It acts as a moisture barrier, lovingly wrapping the wood and shielding it from the concrete’s water-hungry clutches.

2. Building Paper: The Chivalrous Knight

Ah, building paper, the knight in shining armor for woodworkers. This paper may not have the flash and pizzazz of plastic sheeting, but it gets the job done with its moisture resistance. It’s like a tough barrier that says, “Concrete, you shall not pass!”

3. Asphalt Roofing Felt: The Quirky Solution

Don’t let the name fool you—roofing felt is a versatile player in the construction world. It may have found its fame on the rooftops, but it also deserves a chance between wood and concrete. This weirdly wonderful material not only keeps moisture at bay but also cushions the wood like a fluffy cloud. It adds a touch of eccentricity to your project while ensuring a lasting bond between wood and concrete.

While wood and concrete may seem like an odd couple, they can work harmoniously with the right barrier. Whether you choose plastic sheeting, building paper, or even asphalt roofing felt, these humble materials will ensure a long-lasting and moisture-free relationship between wood and concrete. So go forth, brave DIYer, and let your woodworking and concrete dreams unite in perfect harmony!

What should I put between wood and concrete?

FAQ: What should I put between wood and concrete?

When it comes to the dynamic duo of wood and concrete, there are a few key considerations. Properly protecting wood from concrete can help prevent rot, ensure structural integrity, and maintain the longevity of your project. In this FAQ-style article, we’ll address common questions about what should be placed between wood and concrete to keep things sturdy, moisture-free, and looking their best.

What do you put between a sill plate and concrete

To create a barrier between a sill plate and concrete, it’s essential to use a high-quality sill seal. A sill seal, made from foam or rubber, acts as a gasket, preventing moisture from seeping into the wood. This simple but effective solution helps keep your sill plate safe from rot and ensures a strong foundation for your structure.

Can pressure treated wood touch concrete

Yes, pressure-treated wood can come in contact with concrete. However, it’s a good idea to include a protective layer between the two to prevent moisture buildup that can lead to rot. A sill seal, typically made of foam or rubber, is an ideal option as it acts as a moisture barrier while still allowing the necessary contact between wood and concrete.

Can you stop wood from rotting

Although wood is a natural material and susceptible to rot over time, there are steps you can take to slow down the process. One effective method is applying a quality wood preservative or sealant. These products create a protective barrier that helps repel water and prevent rot. Regular maintenance, such as inspecting for signs of damage and promptly repairing or replacing rotten wood, is also crucial for preserving the integrity of wooden structures.

What do you put between a house and concrete

When it comes to the junction between a house and concrete, a flexible and waterproof caulking is your best friend. Applying caulking along the gap helps prevent water from seeping into the wall cavity, protecting both the concrete and your home’s structure from potential damage. Be sure to choose a caulking product suitable for both exterior use and bonding to concrete.

What should I put between a patio and house

To ensure a seamless and water-resistant connection between a patio and your house, a quality expansion joint is essential. An expansion joint is a flexible material that fills the gap between the two surfaces and allows for natural movement without causing cracks or damage. Look for options specifically designed for outdoor use and capable of withstanding the elements for a long-lasting solution.

Can you caulk between wood and concrete

Absolutely! Caulking between wood and concrete is an effective way to seal gaps, prevent moisture infiltration, and keep your project looking tidy. Just make sure to choose a caulk suitable for both wood and concrete surfaces. Applying a generous bead of caulk along any openings or joints will help create a watertight seal and maintain the integrity of the connection.

Can I glue furring strips to concrete

Certainly! If you’re looking to attach furring strips to a concrete surface, using a reliable construction adhesive is the way to go. Opt for a product specifically formulated for bonding wood to concrete, ensuring a strong and durable connection. Apply the adhesive in a zigzag pattern along the length of the furring strip and press firmly against the concrete for optimal adhesion.

How do you seal a gap between concrete and wood

Closing the gap between concrete and wood can be achieved with a combination of materials. First, insert a foam backer rod into the gap to provide a firm base. Next, apply a bead of high-quality caulk, specifically designed for use on both concrete and wood, along the entire length of the gap. Smooth the caulk into place with a putty knife, ensuring a tight seal. This double-duty approach will help prevent moisture intrusion and maintain a neat appearance.

Will treated wood rot in concrete

Treated wood offers an added level of protection against rot compared to untreated wood. However, prolonged exposure to moisture can still take its toll. It’s best to follow good construction practices and create a barrier between treated wood and concrete to minimize the potential for moisture-related issues. Utilize a proper moisture barrier, such as a sill seal or foam gasket, to ensure the longevity of your treated wood in concrete applications.

Do I need a moisture barrier between concrete and wood

Indeed, a moisture barrier is highly recommended between concrete and wood. It acts as a protective shield against water infiltration, mitigates moisture-related issues like rot and mold, and preserves the structural integrity of wood. Options such as sill seals, foam gaskets, or even a layer of plastic sheeting provide effective moisture barriers when placed between concrete and wood surfaces.

Can cedar be in contact with concrete

While cedar is known for its natural resistance to rot and decay, it’s still advisable to create a separation between cedar and concrete to maximize its longevity. Using a moisture barrier, such as a sill seal or foam gasket, prevents direct contact and the potential for moisture-related issues. This precautionary step ensures that your cedar remains in great shape for years to come, even in contact with concrete.

Will paint prevent wood rot

Paint can indeed provide an extra layer of protection against wood rot. A quality exterior paint acts as a barrier, shielding the wood from moisture while adding beauty to your project. However, it’s crucial to note that paint alone is not a foolproof solution. Proper surface preparation, including addressing any existing rot or damage, applying primer, and using a durable paint specifically formulated for exterior use, is essential for the best results.

How do you protect wood from moisture

Protecting wood from moisture requires a proactive approach. Firstly, ensure proper ventilation and adequate drainage around wooden structures. Secondly, use a quality wood preservative or sealant to create a protective barrier. Regularly inspect and maintain wooden surfaces, promptly addressing any signs of damage or decay. Lastly, employing moisture barriers, such as sill seals or foam gaskets, when connecting wood to other materials like concrete, helps minimize moisture-related issues.

How do you keep wood from rotting outside

Keeping wood from rotting outside involves implementing a combination of preventative measures. Regularly inspecting wood surfaces for signs of damage, promptly repairing or replacing rotten wood, and applying a wood preservative or sealant all contribute to its protection. Additionally, ensuring proper airflow, adequate drainage, and using moisture barriers when connecting wood to other materials like concrete helps combat moisture-related issues and prolong the life of outdoor wood.

What can I use to protect wood from concrete

To safeguard wood from concrete’s moisture, a moisture barrier such as a sill seal or foam gasket is highly recommended. These materials create a protective layer, preventing direct contact and reducing the chances of moisture-related problems like rot. By using a moisture barrier, you can preserve the integrity and appearance of the wood while ensuring a strong bond with the concrete.

How do you anchor wood to concrete

Anchoring wood to concrete is achievable through various methods, with concrete anchors being a popular choice. To anchor wood securely, start by drilling pilot holes into the wood and concrete. Next, insert concrete anchors into the holes, ensuring they are flush with the wood’s surface. Finally, tighten the screws into the anchors, securing the wood firmly in place. This straightforward yet effective technique provides a reliable connection between wood and concrete.

How do you keep wood from rotting in concrete

To prevent wood from rotting when in contact with concrete, it’s crucial to address moisture concerns. Utilize a moisture barrier, such as a sill seal or foam gasket, to create separation between wood and concrete and inhibit moisture transfer. Additionally, taking proper preventive measures like using treated wood and applying wood preservatives further fortifies the wood against rot. By implementing these strategies, you can keep wood from succumbing to the destructive forces of moisture in concrete environments.

What is the best adhesive to attach wood to concrete

For bonding wood to concrete, a reliable construction adhesive specifically designed for this purpose is your go-to option. Look for high-quality adhesive products that provide a strong and durable bond. Ensure the adhesive is compatible with both wood and concrete surfaces, following the manufacturer’s instructions for optimal results. With the right adhesive, you can securely attach wood to concrete, forming a sturdy connection that stands the test of time.

Can you attach wood directly to concrete

While it is possible to attach wood directly to concrete, it’s generally recommended to use a moisture barrier for improved protection. By adding a moisture barrier, such as a sill seal or foam gasket, between the wood and concrete, you can minimize the risk of moisture-related issues like rot. This precautionary step ensures your wood stays strong and resilient, even in direct contact with concrete.


With these FAQs answered, you’re now armed with knowledge to create a sturdy, long-lasting connection between wood and concrete. By understanding and implementing proper techniques and materials, you can protect your structures from moisture damage, rot, and other potential headaches. Remember, when it comes to wood and concrete, a little extra care goes a long way in ensuring a solid foundation and happy projects.

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