How to Prevent Insects in Slider Doors

Seal any gaps you may find in or under your slider doors with 1/2-inch or 3/4-inch foam weather stripping. Weather stripping blocks passageways that a variety of insects may use.

Squirt a bead of clear acrylic latex caulk into any cracks, gaps, or spaces you find around the threshold. A threshold provides a track for the door to “slide” on, and the exterior edge of the threshold often separates slightly from the side of the building due to changing weather conditions. Clear caulk blends in well with all building materials and it cleans easily with a damp rag. Run a bead of caulk about the size of the tip of a crayon.

Inspect the exterior side and top edges of the slider door frame. These easily forgettable areas usually go unnoticed until insects use them for entry. Fill all cracks and crevices around the slider door frame with caulk.

Dampen your fingertip with water and press the caulk firmly into the cracks. Smooth off the remaining caulk with a damp rag. Large spaces may require a double bead of caulk and a putty knife to press the caulk into the crack.

Patch a tear in a slider screen if one exists. Bugs can use the smallest of tears to gain entry. Cut a piece of screen to overlap the tear about an inch. “Sew” the screen patch over the tear with screen wire to fasten it to the door screen. You can usually purchase screen-repair materials at a hardware store. Check the rest of the screen and apply patches where needed.