Installing Magnetic Insect Screen – Grills with gap Published December 11, 2018 at 1599 × 1200 in InsectOut Magnetic Insect Screen & Window Mesh ← Previous Next → For Ms C, she wanted to make sure that she never see any cockroach fly into her house. That’s why she installed InsectOut Magnetic Insect Screen. In this case, the insect screens had to be installed directly onto her window frame, because of the gap between grills & winframe