Are you looking to maximize your outdoor space? The area under your deck might be the perfect solution for additional storage. Many homeowners can take the do-it-yourself (DIY) approach to create a storage space below their decks with some planning and effort. In this article, we’ll explain what you need to know about building under-deck storage, how to prepare the space for this project, and when to hire a pro.
Assessing Your Deck’s Suitability for Storage
There are a few ways to determine whether the space under your deck is a good storage spot. Take the following steps to evaluate your deck’s suitability:
- Consider ground conditions: Take a look at the ground to ensure it’s level and drains well. You’ll need to address issues, such as water accumulation or uneven ground, before you move forward with your storage project.
- Evaluate deck conditions: Check for signs of rot, splintering, or rusty screws and fasteners. If you aren’t sure whether your deck is in good enough condition to offer storage underneath it, contact an experienced contractor for an evaluation.
- Measure the available space: Not all under-deck space is large enough for storage. Most storage solutions need at least 5 feet of clearance between the ground and deck floor joists, so measure the length and width of the area to calculate the total square footage.
Planning Your Under-Deck Storage Project
If you’ve determined that your under-deck space is in good condition, you can start to plan your project. Follow the tips below:
- Address local regulations: Contact your municipality to meet all local building and permit requirements, and you’ll also want to check for any restrictions under your homeowners association if you have one.
- Define storage objectives: Consider what you’d like to use the under-deck storage for. For example, if you plan on using the space to store moisture-sensitive items, you’ll need a more enclosed waterproof storage area. You can also decide how you want to organize the space and if you’d like to include any shelves or racks for vertical storage.
- Identify any potential limitations: Check under the space for any utilities such as air conditioning units. This will change the layout of the area and how much you can store.
Choosing the Right Under-Deck Storage Solution
There are a few options to create under-deck storage. Your decision depends on your storage needs, budget, and the conditions under your deck. The following storage types are available:
Option 1: Basic Open Storage
Basic open storage is simple and doesn’t cost much to pull together, making it a DIY-friendly project. You can store items that can withstand some moisture exposure. You can create a level surface and install lattice or fencing around the perimeter of the deck for basic enclosure. Consider this storage solution for garden tools, outdoor toys, or things that can be protected with covers.
Option 2: Semi-Dry Enclosed Storage
When you need storage for items that need some protection against moisture, a semi-dry enclosed solution works well. You have to install a water drainage system beneath the deck boards and then enclose the area with weather-resistant siding. You’ll find that this storage type offers more security and protection compared to the basic open option, so you can store lawn equipment, bicycles, and other valuable outdoor gear.
Option 3: Fully Waterproof Storage Room
A fully waterproof storage room provides maximum protection and versatility. You have to install a waterproof membrane above the deck joists. Since you’re creating a fully enclosed room under your deck, it will be more expensive and complex to put together. You can store many items in an under-deck storage room and even use it as an extension of your living space if you choose to do so.
Preparing the Ground Under Your Deck for Your Storage Area
You can prepare the ground underneath your deck to make sure it drains well and provides stability for your storage area.
Start by grading the ground to slope away from your home. You can aim for a slope of a quarter of an inch per foot toward a drainage point, which will help to direct water from the storage area and your house’s foundation.
Once you’ve properly graded the ground, you can install a foundation. Basic storage requires a layer of crushed stone over geotextile fabric. This will provide a stable, well-draining surface. For more advanced storage solutions, you may need to install a concrete slab or pavers so that you have a solid floor for your storage area.
Installing an Under-Deck Water Management Systems
Creating a water management system under the deck will protect your items and prevent damage to your home’s foundation. The system you decide to install will depend on your storage solution and budget. Below are a few drainage system options:
- Above-joist membranes: Installed above the deck joists but below the decking boards
- Gutters and downspouts: Traditional gutter systems adapted for under-deck use
- Under-joist systems: Panels or troughs installed beneath the deck joists
You can take the DIY approach to install your drainage system, but some systems may require professional expertise. Consider your skills, available time, and the complexity of the system before you decide to take it on by yourself.
Building the Under-Deck Storage Structure
Once you’ve graded the ground and installed a water management system, you can build the storage structure. The steps below outline the process:
- Framing the storage area: A basic open storage system doesn’t require much of a frame, but if you’re building an enclosed storage structure, you can build a frame with pressure-treated lumber. The frame must be level and securely anchored. Wood that hasn’t been pressure-treated needs to be at least 6 inches off the ground so that you can avoid rot.
- Selecting and installing siding: Find a siding that works in your location and climate—weather-resistant siding materials include vinyl siding, fiber cement boards, or treated plywood. Follow manufacturer’s instructions when you install it and make sure you have proper overlap and sealing so that moisture stays out.
- Creating access points: You can build a door that provides easy access to your storage area. If your storage area covers a large space, you can use double doors and a sliding door to accommodate larger items.
Enhancing Security for Your Storage Area
Keep your items safe by taking proper security measures. This will help you protect your property against theft or vandalism. Consider these additional steps to secure your storage area:
- Installing locks and bolts: Add locks or bolts to doors and access points or use heavy-duty padlocks or deadbolts for these areas to deter intruders.
- Using motion sensor lights: These lights will illuminate the area when movement is detected.
Keeping Pest Control in Mind for Under-Deck Storage
Pests can cause damage to your belongings. They can even damage the structure itself. To deter insects, mice, and other pests, make sure there aren’t any gaps or openings where a critter can get in. Seal cracks and holes with caulk or weatherstripping. You can also use pest-repellent materials, such as treated wood.
Maintaining Your Under-Deck Storage
Inspecting your under-deck space will help you maintain your storage area. Check for signs of water intrusion, pest activity, or structural issues. You can also inspect the water management system for leaks, especially after heavy rains.
If you notice any moisture problems, address them promptly. You might need to reseal joints, repair damaged siding, or improve ventilation. Remember to keep the area clean and dry to prevent mold and mildew growth.
Our Conclusion
Under-deck storage maximizes your outdoor space and creates additional storage options for your home. While some DIYers have enough experience to build an under-deck storage space, a professional contractor can help you create the space or manage any issues you discover as you start the project. Storing your gardening tools, outdoor equipment, or seasonal items will be a breeze once this project is complete.
