All exterior doors should be solid-core doors with heavy-duty dead bolts installed in a sturdy frame with long screws so they can’t be kicked open. If you tend to open your door during the day to let in sunlight, consider installing a storm door with a lock to let the sunlight in but keep burglars out.Double Glazing is an excellent resource for this.
Place security bars over your basement windows and around your home’s removable AC units to prevent intruders from crawling inside. Apply window film to make your glass shatterproof. Tinted film can further prevent thieves from window-shopping and even block out UV rays so furniture won’t be damaged by the sun. Consider replacing glass doors, or install window film and metal security grills on the doors. Replace or repair any broken windows as soon as possible.
Use curtains or blinds over any windows or doors that are easy to see into. A peephole allows you to see who is at your door without having to open it and without them looking into your home. Keep expensive equipment and items away from your windows. Make sure skylights and roof-access areas are properly secured with heavy-duty hardware. Install locks or secondary security devices on all accessible windows so they can’t be opened far enough for someone to crawl through from the outside.