Magnets are essential components in modern doors and windows, enhancing functionality, security, and user experience by enabling smooth closing, secure latching, and draft prevention. From residential entry doors to cabinet doors and window screens, door and window magnets are designed to be compact, cost-effective, and durable—with ferrite magnets (the most common choice) and small neodymium (NdFeB) magnets dominating due to their balanced strength, affordability, and resistance to environmental factors like moisture and temperature changes.

A primary application of magnets in doors is in magnetic door catches, widely used for cabinet doors, closet doors, and pantry doors. These catches consist of two parts: a small ferrite magnet (mounted on the door frame) and a ferromagnetic metal plate (attached to the door). When the door closes, the magnet attracts the metal plate, holding the door securely shut without the need for noisy mechanical latches or hinges. For example, kitchen cabinet doors use low-strength ferrite magnets (typically 50–100 gauss) that provide enough holding force to keep doors closed but allow easy opening with a gentle pull—preventing doors from swinging open due to vibrations (e.g., from nearby appliances like dishwashers). High-strength NdFeB magnets are used for heavier doors, such as wooden closet doors, where stronger holding force (200–300 gauss) is needed to counteract the door’s weight.

In windows, magnets are critical for screen retention and draft sealing. Magnetic window screens use flexible ferrite magnets sewn into the screen’s edges, which attach to ferromagnetic strips mounted around the window frame. This design allows easy installation and removal (e.g., for cleaning or storage) while creating a tight seal that keeps insects out and prevents drafts. Unlike traditional screen frames that require screws or clips, magnetic screens are tool-free to install, making them popular for rental homes or temporary use. Additionally, magnetic weatherstripping—incorporating small ferrite magnets—lines the edges of window sashes, creating an airtight seal when the window is closed. This reduces heat loss in winter and heat gain in summer, improving energy efficiency and lowering utility bills.

Outdoor doors, such as patio doors or garden gates, use magnetic latches for security and convenience. These latches combine a ferrite or NdFeB magnet with a metal striker plate, ensuring the door stays closed even in windy conditions. Some magnetic door latches also include a safety feature: a built-in magnet that releases the latch when pulled with moderate force, preventing the door from slamming shut and causing injury.

Door and window magnets are designed to withstand daily use and environmental stress. They’re often coated with plastic or rubber to prevent corrosion from rain or humidity, and their magnetic strength is calibrated to balance holding force and ease of use. Whether securing a kitchen cabinet or sealing a window against drafts, magnets play a vital role in making doors and windows more functional, quiet, and energy-efficient.