Design Pressure (DP)

Related terms

• Door Closer

  A device that controls a door's closing speed and ensures it latches, common on garage-to-house fire-rated doors.

• Deadbolt

  A lock bolt thrown by a key or thumbturn (not spring-actuated), the primary security lock on an exterior door. Grade 1 is the highest res…

• Door Jamb

  The frame the door is mounted in — two side jambs and a head jamb. Must be plumb and square for the door to operate and seal.

• Condensation Resistance

  An NFRC-rated measure (0–100) of a window's ability to resist interior surface condensation; higher is better.

• Door Sweep

  A seal along the bottom edge of a door that closes the gap to the threshold against drafts, water, and pests.

• Clad Window

  A wood-interior window with an aluminum or vinyl exterior skin, combining a warm interior with a maintenance-free exterior.

• Double-Hung Window

  A window with two operable sashes that both slide vertically and usually tilt in for cleaning. The most common residential window in olde…

• Casing

  The decorative trim framing a window or door opening on the interior or exterior, covering the gap between frame and wall.