Rows of finished doors standing in the Builders Outlet warehouse

Prehung Doors in Denver

Builders Outlet sells prehung doors in Denver. Frame a rough opening 2 inches wider and 2 1/2 inches taller than the door.

+2 into the door width
+2 1/2 into the door height
82 1/2 inopening height for an 80 inch door

A 30 by 80 inch door, written 2/6 by 6/8, needs a 32 by 82 1/2 inch opening.

Opening sizes for prehung doors in Denver

These widths assume an 80 inch door. Check the door's own spec before you frame.

Door widthOpening widthOpening height
24 inches26 inches82 1/2 inches
28 inches30 inches82 1/2 inches
30 inches32 inches82 1/2 inches
32 inches34 inches82 1/2 inches
36 inches38 inches82 1/2 inches
Rough opening guide chart for single and double doors

Measure the opening you have

Measure the width

Measure across at the top, middle and bottom.

Measure the height

Measure up on both sides of the opening.

Use the smallest number

Keep the smallest measurement from each set.

Bring it in

Write width by height and bring it to the showroom.

White interior door with a glass knob opening onto a bedroom

Residential and commercial

We sell prehung doors for homes and commercial spaces. The online shop lists prehung interior doors from Woodgrain and JELD-WEN. Browse interior doors, exterior doors or the full Doors page.

Unsure of a size? Contact us or call 303-789-0808.

A worker sanding a door at a bench in the Builders Outlet mill shop

Odd-sized opening?

Our mill shop can modify a door to fit.

See custom doors →
What do 2/6 and 6/8 mean?
They are feet and inches. 2/6 is 30 inches wide and 6/8 is 80 inches tall.
Can I buy a prehung door online?
Yes. The online shop lists doors prehung or as slabs, by size and hinge finish.
Do you sell commercial prehung doors?
Yes. Bring your door measurements to 775 Canosa Court.
Doors and lumber on racks in the Builders Outlet warehouse

Bring your door measurements

We will help you match a door to your opening.

303-789-0808