You do not need to get rid of your shrubs and bushes completely, but you should at least avoid planting them next to the foundation of your house to limit the number of spiders wandering inside. Boxes and bags of items stored in outdoor sheds and garages are another appealing spot for spiders. Reducing the number of items you store outdoors will also reduce the number of spiders you spot. If you do plan to store something outside, put it into a sealed plastic container instead of a cardboard box. Sealed containers prevent most spiders from squeezing inside, so you will have fewer unpleasant surprises to deal with when you open the container later on.
Check boxes stored outdoors before you bring them into the house. Remove webs when you spot them. When you see a spider web on the side of a building or somewhere in your yard, physically remove the web to discourage the spider that built it from returning. In most instances, you will need to remove the web with a broom, mop, or garden hose. If you are near enough to an electrical outlet, you can also use a vacuum to remove webs and egg sacs you spot outside. While outdoor lighting has nothing to do with spiders directly, outdoor lights will attract many insects, and the increased number of insects will also lead to a spike in your spider population.
Use your outdoor lights as little as possible. Direct the lights away from your house to draw the insects and spiders further away from your foundation. The softer light is less appealing to insects and may not draw as many as a bright white light does. Seal cracks in your walls. Apply silicone caulk to any cracks around your windows and doors or along the foundation of your home. Most spiders will sneak into a building through these various cracks and unintended openings. Sealing the cracks will prevent the spiders from coming in.
You can purchase caulk from a hardware store. Follow the instructions provided on the label to prepare and apply the caulk correctly. When you apply the caulk, make sure that the cracks are completely filled and covered. Install tight-fitting screens, weather stripping, and door sweeps. These are the other types of passageways spiders use to invade your home. Weather stripping and door sweeps will seal the gaps left at the bottom and sides of your doors and windows. Door sweeps are especially important because you cannot use caulk to cover the crack at the bottom of the doorway, making a properly fit door sweep your only means of cutting that path off from spiders.
A tight-fitting screen is also an essential tool. Spiders can slip in through the gaps left by loose screens, and so can many insects spiders like to feed on. Install screens over your windows and vents. Repair any holes in your screens as soon as you spot them. If you spot a hole in your screen, repair it or replace the screen. Otherwise, spiders and insects may find their way into your home through that hole. Spiders gravitated toward clutter inside a building as readily as they do outside a building.
Do not let piles of clothing, papers, towels, linens, or shoes sit on the floor. If you do leave a pile of clutter on the floor, shake out each piece of material as you clean the clutter up to shake off any unwelcome spiders. Place storage items in sealed plastic bins. Spare clothing, holiday decorations, extra linens, and other objects that belong in long-term storage should be stored in sealed containers to prevent spiders from sneaking in. Do not use cardboard boxes. If you must rely on cardboard boxes, however, cover all exposed openings with packing tape.
Good storage methods are especially important for items stored in a dark basement or attic. Consider storing outdoor tools and sports equipment in sealed storage containers, as well. This includes roller skates, gardening tools and clothing, ski boots, and team uniforms. If you do not want to store these items in plastic bins, store them in a large plastic bag with a tight seal and no holes. Cover all sources of pet and human food. Spiders are not interested in human and pet food, but insects that spiders feed on are very interested in these food sources. As a result, keeping food hidden away in sealed bags and containers will attract fewer insects, thereby attracting fewer spiders. You should regularly clean your general living area, but every couple of weeks, you should also clean around the areas where spiders like to dwell. Vacuuming and dusting removes both full-grown spiders and egg sacs, preventing the latter from hatching and producing a vast quantity of baby spiders. Vacuum under furniture, inside closets, under heaters, and around all baseboards. Dust high wall corners and other areas prone to little human or pet activity.