What it is:
Your standard door; the most popular kind. Pro: It can be flush (flat) or textured (with detailing). You can customize it with glass inserts.Con: None!Cost: About $130 to $5,000.
Two door panels that lock in the middle and swing in or out. Pro: The doors let in breezes and natural light.Con: You’ll need to account for clearance on each side.Cost: About $1,500 to $5,500.
A door with two to four panels that slide past one another. Pro: It provides a tight seal (so it’s energy-efficient) and doesn’t require any clearance.Con: Only one side opens at a time.Cost: About $300 to $2,500.
A door divided horizontally into two halves. Pro: You can leave the top open and the bottom shut (so Fido stays in or out).Con: Air can leak in or out if weather stripping is not properly installed.Cost: About $1,550 to $3,500.
A system of hinged doors that stack against a wall. Pro: Perfect for indoor-outdoor living, it’s weather-tight when closed.Con: It’s expensive, and you’ll have to buy custom-made screens.Cost: About $3,000 per panel.