Spiders enter sheds seeking dark, damp corners, so sealing gaps and reducing clutter removes their preferred hiding spots. Learning how to keep spiders out of shed spaces is easier than you think once you understand what attracts them in the first place. You don’t need harsh chemicals to win this battle, just a weekend of focused effort and a few simple supplies.
Most sheds are the perfect spider hotel. They offer shelter from weather, plenty of undisturbed boxes, and a steady supply of insects to eat. If you want your storage space back, you have to change the environment. Here is your complete, practical guide to making your shed a no-go zone for eight-legged visitors.
Why Spiders Love Your Shed
Before you start sealing cracks, you need to think like a spider. They are not random wanderers. They are looking for three specific things: food, moisture, and darkness. Your shed provides all three in abundance.
If you have a dirt floor or a concrete slab that gets damp, that is a major draw. Spiders need hydration, and they will find it in humid corners. Also, if you store firewood, gardening supplies, or old cardboard boxes, you are basically handing them a furnished apartment.
Identify The Spider Entry Points
You cannot fix what you cannot see. Grab a flashlight and walk around your shed slowly. Look at the bottom edges where the walls meet the ground. Look at the door frame and the windows. Look at the roof line where the siding meets the roofing material.
Even a gap the size of a pencil eraser is enough for a small spider to squeeze through. Pay close attention to the corners where utility lines or vents enter the structure. These are often forgotten and left wide open.
How To Keep Spiders Out Of Shed: The Sealing Method
This is the most critical step. You are physically blocking their path. If they cannot get in, they cannot set up camp. This is the core of the strategy for how to keep spiders out of shed buildings permanently.
Inspect And Seal Gaps With Caulk
Get a high-quality silicone or acrylic latex caulk. Use it to seal any cracks you found in the walls, foundation, and window frames. Do not just do the obvious spots. Run your hand along the seams and feel for drafts.
- Seal around the door frame completely
- Fill gaps around window panes
- Close up holes where pipes enter the shed
- Patch any rotting wood sections
For larger gaps, use expanding foam spray. This is great for filling big holes around vents or where the floor meets the wall. Let the foam dry completely, and then trim off the excess with a utility knife.
Install Door Sweeps And Weather Stripping
The bottom of the door is the biggest entry point. There is often a visible gap between the door and the threshold. Install a rubber door sweep that touches the floor. This blocks spiders, but also keeps out mice and cold air.
Add weather stripping around the sides and top of the door. This creates a tight seal when the door is closed. If your shed door is warped or does not close flush, consider adjusting the hinges or replacing the door altogether.
Fix The Ventilation Screens
Sheds need vents to prevent moisture buildup, but those vents are open highways for bugs. Check every vent screen for tears or holes. If the mesh is damaged, replace it with a fine metal mesh. Fiberglass screens can be chewed through by rodents, which then let spiders in.
Make sure the screens fit snugly into their frames. Use a staple gun or small screws to secure them if they are loose. This keeps the airflow moving but stops the critters.
Remove The Spider’s Food Source
You can seal every crack in the world, but if the shed is full of flies and ants, spiders will still find a way to get to the buffet. You have to cut off their food supply to make the shed unattractive.
Control The Insect Population
Start by using a residual insecticide spray around the exterior perimeter of the shed. Focus on the base of the walls and the door threshold. This kills insects on contact and leaves a residue that continues to kill for weeks.
Inside the shed, use a non-toxic spray or a few strategically placed sticky traps. You want to reduce the number of insects spiders can eat. If there is no food, the spiders will leave on their own or starve.
Turn Off The Lights At Night
Outdoor lights attract moths and other flying insects. Those insects attract spiders. If you have a light fixture on the shed, change the bulb to a yellow or amber “bug light.” These are less attractive to insects.
Even better, keep the light off unless you are actively using the shed. If you need security lighting, install motion-sensor lights instead of leaving them on all night. This reduces the insect population around the shed dramatically.
Declutter And Clean To Remove Hiding Spots
Spiders are shy. They want to hide in dark, undisturbed places. If your shed is packed with boxes, tools, and yard waste, you have given them thousands of hiding spots. A clean shed is a spider-free shed.
Use Plastic Storage Bins Instead Of Cardboard
Cardboard boxes are a spider paradise. They are dark, absorb moisture, and provide great nesting material. Replace all cardboard boxes with clear, plastic, airtight storage bins. The clear plastic lets you see what is inside without opening them.
The airtight seal keeps spiders out and also protects your items from dust and moisture. This is one of the best long-term investments you can make for your shed organization.
Lift Everything Off The Floor
Spiders love to crawl along the floor and build webs in the corners. Do not store anything directly on the floor. Use shelves, pallets, or plastic risers to lift boxes and equipment at least six inches off the ground.
This makes it much harder for spiders to find a quiet spot. It also makes it easier for you to see webs and clean them up. When you can see the floor, you can spot spider activity early.
Vacuum And Sweep Regularly
Make it a habit to sweep the floor and corners every few weeks. Use a vacuum with a hose attachment to suck up webs, egg sacs, and spiders themselves. This physically removes them from the premises.
Pay special attention to the ceiling corners and the top edges of the walls. This is where spiders like to build their main webs. Do not just knock the webs down; vacuum them up so they cannot be reused.
Use Natural Spider Repellents
If you want to avoid chemical sprays, there are several natural scents that spiders hate. These are not always 100% effective, but they work well as a deterrent when combined with sealing and cleaning.
Essential Oil Sprays
Peppermint oil is the most popular natural spider repellent. Spiders hate the strong menthol smell. Mix 15-20 drops of peppermint essential oil with water in a spray bottle. Add a tiny squirt of dish soap to help the oil mix with the water.
Spray this mixture around the door frames, windows, and corners of the shed. Reapply every week or after heavy rain. You can also use tea tree oil, eucalyptus oil, or citrus oil. These all work to mask the scents spiders use to navigate.
Spread Diatomaceous Earth
Diatomaceous earth (DE) is a fine powder made from fossilized algae. It is sharp on a microscopic level and cuts into the exoskeleton of spiders and insects, causing them to dehydrate and die. It is safe for pets and humans.
Sprinkle a thin layer of DE along the baseboards, in corners, and around the threshold of the door. You want to create a barrier line. Just remember that DE only works when it is dry. If the shed gets damp, you will need to reapply it.
Use Cedar Blocks Or Chestnuts
Cedar wood naturally repels moths and spiders. Place cedar blocks or cedar chips in the corners of the shed and inside storage bins. The scent lasts for months and is a natural deterrent.
Some people swear by placing horse chestnuts (conkers) in the corners of rooms. While scientific evidence is mixed, many gardeners find this works as a mild deterrent. It is a cheap and harmless trick to try.
Set Up Spider Traps And Glue Boards
For immediate results, you can set up traps to catch the spiders that are already inside. This is not a long-term solution, but it helps you win the initial battle and monitor how bad the problem is.
Place Sticky Traps In Corners
Buy commercial glue traps designed for spiders. Place them flat against the wall in corners, behind shelves, and under workbenches. These traps catch spiders as they scurry along the baseboards.
Check the traps regularly and replace them when they are full. This also tells you where the spiders are coming from. If one trap is always full, you know you missed a gap in that area.
Use A Vacuum For Immediate Removal
When you see a spider, do not squish it. Squishing can release eggs from a female spider. Instead, use a vacuum cleaner to suck it up. The vacuum kills it instantly and removes the body.
If you have a wet/dry shop vac, you can add a little soapy water to the bottom of the canister. This ensures any spiders that are sucked up are killed immediately and cannot crawl back out.
Maintain The Exterior Perimeter
The area around the shed is just as important as the inside. Spiders often live in the grass and mulch right next to the shed walls. They use this vegetation as a bridge to get inside.
Trim Back Bushes And Tall Grass
Keep the grass trimmed short around the shed. Cut back any bushes or vines that are touching the exterior walls. These plants give spiders a direct pathway to the roof and windows.
You want a clear, dry zone of at least 12 inches between the shed and any vegetation. This exposes the spiders to predators and makes them less likely to hang around.
Move Firewood And Compost Away
Firewood piles are spider magnets. Do not stack firewood against the shed wall. Store it at least 20 feet away from the structure. The same goes for compost piles and piles of leaves.
These organic materials hold moisture and attract insects. If you keep them away from the shed, you remove the habitat that spiders need to survive.
Frequently Asked Questions
What is the best way to keep spiders out of a shed?
The best way is to seal all cracks and gaps with caulk, install a door sweep, and remove clutter. Combining these physical barriers with regular cleaning and a peppermint oil spray will give you the best results.
Does vinegar keep spiders away from sheds?
Yes, vinegar can work as a short-term repellent. Mix equal parts white vinegar and water in a spray bottle and spray it around the perimeter. The acetic acid burns the spiders’ senses. However, the smell fades quickly and needs frequent reapplication.
Why do I keep getting spiders in my shed?
You likely have gaps in the structure that let them in, or you have a lot of clutter and moisture. Spiders are also following insects. If you have a lot of bugs, you will have a lot of spiders. Focus on reducing the insect population.
Should I use a fogger or bomb in my shed?
Foggers can kill spiders on contact, but they do not leave a lasting residue. They also do not address the root cause. You are better off using a residual spray and sealing the entry points. Foggers are a temporary fix.
Does cinnamon repel spiders in a shed?
Yes, cinnamon has a strong scent that spiders dislike. You can sprinkle ground cinnamon in corners or use cinnamon sticks. It is a safe and natural option, but it loses its potency when it gets wet or dusty.
Keeping spiders out of your shed is an ongoing process, not a one-time fix. You have to stay on top of the cleaning and check the seals every few months. The good news is that once you break the cycle of food and shelter, the spiders will move on to easier locations. Start with the door sweep and the caulk gun, and you will see a difference almost immediately. Your shed will finally be a safe, clean space for your tools and storage, not a nursery for arachnids.