Standard Gap Between Exterior Door And Floor

Nfpa 80 s clearance dimensions apply to the entire perimeter around and under the doors and between paired doors.

Standard gap between exterior door and floor.

Most entry door frames have a piece of lumber below the door and combined with the metal threshold will raise the base of the door off the concrete or wood sub floor by approximately 1 1 4 inches as shown in figure 2. The most common solution is to add wood planks to the floor not the door. In other words the door gap dimensions must be within nfpa 80 s specifications along the full height of the vertical edges and across the full width of the doors at the tops and bottoms. It is more effective to leave 4 mm and more for rooms with high humidity and for doors made from materials absorbing well moisture.

There is a 1 5 inch gap between the threshold and the bottom of the wooden door. These are most commonly available in unfinished oak or. To fix the issue the doors need to be removed bottom of the jambs cut and reset the door. These are called saddles.

The typical prefit for the lock stile hinge stile and head is 1 8 inch 3 mm measured on the widest face of the door. Except for fire doors i am aware of no standards for the gap or amount of prefit on a door either interior or exterior except as established by the individual door manufacturer. They are specialized moldings usually about 3 to 6 inches wide with tapered edges. I have never seen a door set with that big of a gap unless it was to get past floors that were not level.

Between a leaf of interior doors and the floor it is required to leave a gap of at least 2 2 5 cm to provide natural ventilation. The usually are 1 2 to 3 4 inches thick. They are centered under the door and reduce airflow and noise. A gap of 4 cm is allowed for convenient and safe door opening.

Craftsmanship standards on the other hand tend to want the gap below the door to be as small as 1 2 at times but this leaves no room for rugs. That is a lot of room for unlevel you have there. The standard i use is 1 2 over finish floors 3 4 is acceptable.