what to put under deck to keep animals out

Natashya

2 min read

·

10-01-2025

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Keeping critters from creating a cozy home under your deck requires a multi-pronged approach. A simple solution rarely works. This article explores various methods, from simple deterrents to more involved construction techniques, to help you choose the best strategy for your situation.

Assessing the Situation: Identifying Your Animal Problem

Before choosing a solution, determine which animals you're dealing with. This will significantly influence your approach. Are you fighting off determined squirrels, sneaky raccoons, or perhaps a family of opossums? Different animals require different deterrents. For example, a fine mesh might deter small rodents, but a larger, more robust barrier is needed for raccoons. Consider taking photos or even contacting animal control for identification if you're unsure.

Simple & Affordable Solutions: Deterrents and Repellents

1. Hardware Cloth: A Solid Foundation

Hardware cloth is a strong, inexpensive, and versatile solution. It's a galvanized metal mesh that you can cut and shape to fit the space under your deck. Secure it to the underside of the deck joists using staples or wire. Choose a mesh size small enough to prevent the targeted animal from squeezing through – 1/4" or 1/2" is generally sufficient for most small critters.

• Pros: Effective, affordable, relatively easy to install.
• Cons: Requires some DIY skills, may not be visually appealing.

2. Natural Repellents: Scent-Based Deterrents

Certain smells can deter animals. Try spreading mothballs, Irish Spring soap, or commercially available animal repellents around the perimeter of your deck. These solutions are a great addition to a physical barrier.

• Pros: Relatively inexpensive, non-toxic (depending on the product).
• Cons: Effectiveness varies greatly depending on the animal and may need frequent reapplication. The smells might also be unpleasant for humans.

3. Motion-Activated Sprinklers: A Startling Surprise

Motion-activated sprinklers are a humane way to scare away animals. When an animal approaches, the sprinkler activates, startling the creature and causing it to flee.

• Pros: Humane, effective for various animals, can cover a large area.
• Cons: Requires electrical access, can be costly, might not deter determined animals.

4. Ultrasonic Repellents: Sound-Based Deterrents

Ultrasonic repellents emit high-frequency sounds inaudible to humans but unpleasant to many animals. These devices can deter animals from entering the area. However, their effectiveness varies.

• Pros: Relatively easy to install, does not harm animals.
• Cons: Effectiveness can be inconsistent. Some animals may adapt to the sounds over time.

More Permanent Solutions: Structural Modifications

For more persistent problems, more robust solutions may be necessary.

1. Concrete or Gravel: Filling the Gaps

Completely filling the space under your deck with gravel or concrete is a permanent solution. This eliminates any potential shelter for animals.

• Pros: Very effective, long-lasting.
• Cons: Expensive, labor-intensive, may affect ventilation under the deck.

2. Solid Under-Deck Enclosure: Complete Protection

A solid enclosure creates a sealed barrier, preventing any access. This is the most effective, but also the most expensive, option. This involves installing solid panels or boards to fully enclose the area beneath the deck.

• Pros: Provides complete protection from animals.
• Cons: Expensive, labor-intensive, can be complex to install.

Maintaining Your Animal-Proof Deck

Regardless of the method chosen, regular maintenance is crucial. Check for holes or weaknesses in your barrier and repair them immediately. Reapply repellents as needed. Consistent upkeep is key to keeping your deck animal-free.

Conclusion: Choosing the Right Solution

Selecting the best method for keeping animals out from under your deck depends on the type of animal, your budget, and your DIY skills. By combining physical barriers with deterrents, you can create a safe and animal-free space under your deck. Remember to prioritize humane methods and consult with professionals if you face persistent problems.