How Do I Insect-Proof an Outside Vent?

Determine which vents are causing the infestation. Many newer vents, such as those for attics, often have insect netting inside. In case that netting becomes damaged, consider purchasing a stainless steel roof vent cover. Vents for clothes dryers are dangerous to block with netting, therefore a dryer vent with an insect flap should be purchased instead. Soffit and gable vents can be safely screened by a homeowner.

Measure the gable vent. Cut your mosquito netting or hardware cloth 2 inches longer and wider than the opening of the vent. Wear work gloves when handling screens as hardware cloth can have sharp edges.

Place the netting over the gable opening. Secure into place with a staple gun, using plenty of staples around the perimeter to prevent gaps. Replace any type of existing gable vent cover over the netting. Netting can be painted a lighter color, if you want it to match the house. Soffit vents can be screened by purchasing soffit vent mesh, then stapling it into place.

Inspect additional points of entry. Sewer vent pipe filters can be purchased at hardware stores or online. These filters come in various sizes for a secure and snug fit. Caulk around vents and fill visible cracks in the foundation or beneath windows or doors. All openings and cracks provide a possible entry point for insects and small pests.