Jambs, Sills and Thresholds

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Jambs, Sills and Thresholds

Horner Millwork stocks a variety of Jambs, Sills and Thresholds or can customize them to your exact specifications and wood species. Fire-rated jambs are also available in 20, 60 and 90-minute ratings for wood and metal.

HORNER STOCK PINE JAMBS

SIZE

JAMB
OPENING SIZE

STOCK SPECIES

Flat Jambs

11/16″ x 4-5/8″ x 6’8″

11/16″ x 4-7/8″ x 7’0″

11/16″ x 6-5/8″ x 6’8″

11/16″ x 6-7/8″ x 8’0″

—

Clear or PFJ

PFJ

Clear or PFJ

PFJ

Split Jambs

11/16″ x 3-5/8″ x 6’8″

11/16″ x 5-1/8″ x 6’8″

11/16″ x 7-1/8″ x 6’8″ *

11/16″ x 9-1/2″ x 6’8″ **

3-1/2″ – 4-1/8″

4-1/2″ – 5-1/8″

5-1/4″ – 7-1/8″

7-1/4″ – 9-1/2″

PFJ

Clear or PFJ

PFJ

*Includes a pair of 4-5/8″ split jamb and two 4-7/8″ male extenders.
**Includes a pair of 4-5/8″ split jamb and two 7-1/8″ male extenders.

SIZE

DOOR THICKNESS

STOCK SPECIES

Double Rabbet Jambs

1-1/4″ x 4-11/16″ x 6’8″

1-1/4″ x 4-7/8″ x 7’0″

1-1/4″ x 6-5/8″ x 6’8″

1-1/4″ x 6-5/8″ x 7’0″

1-3/8″ or 1-3/4″

Clear or PFJ

PFJ

Clear or PFJ

Single Rabbet Jambs

1-1/4″ x 4-5/8″ x 6’8″

1-1/4″ x 5-1/4″ x 7’0″

1-1/4″ x 6-5/8″ x 7’0″

1-1/4″ x 4-5/8″ x 6’8″

1-1/4″ x 4-7/8″ x 7’0″

1-1/4″ x 5-1/4″ x 7’0″

1-1/4″ x 6-5/8″ x 7’0″

1-1/4″ x 9-1/4″ x 8’0″

1-3/8″

1-3/4″

Clear or PFJ

Clear

PFJ

Clear ^

Clear or PFJ

Clear ^

Clear or PFJ

Clear ^ or PFJ ^^

^Jamb is kerfed for foam weatherstripping and dadoed for aluminum sill and machined for hinges and lock at standard Masonite specs.
^^ Available 20 minute fire-rated

Replacement weatherstrip available in 80″ (brown) and 96″ (brown or white)

See our CAD Library for Custom Jamb drawings.

HORNER STOCK HARDWOOD JAMBS

SIZE

DOOR THICKNESS

STOCK SPECIES

Single Rabbet Jambs

1-1/4″ x 6-5/8″ x 7’4″

1-1/4″ x 6-5/8″ x 9’4″

1-3/4″

Sapele Mahogany
Kerfed
(Interior/Exterior Use)

Double Rabbet Jambs

1-1/4″ x 4-11/16″ x 7’4″

1-1/4″ x 4-11/16″ x 9’4″

1-1/4″ x 6-5/8″ x 7’4″

1-1/4″ x 6-5/8″ x 9’4″

1-1/4″ x 4-11/16″ x 7’4″

1-1/4″ x 4-11/16″ x 9’4″

1-3/8″ or 1-3/4″

Poplar Primed
Non-Kerfed
(Interior Use)

Red Oak
Non-Kerfed
(Interior Use)

We manufacture our own custom profiles and size jambs with our in-house moulder. Other species available. Common wood species for interior door jambs are White Oak, Pine, Cherry, Maple, Natural Birch, and Mahogany. White Oak, Pine and Mahogany are also acceptable for exterior use.

CAPTIVA FIRE RATED WOOD JAMBS

Captiva’s fire-rated frames are available in 20-45-60-90 minute ratings. This innovative frame system helps ease the installation process through the use of adjustable metal clips, which provide additional strength while avoiding any exposed fasteners. This frame system also allows for easy removal and re-installation without damaging the finished frame. Intumescent edging is built into the jamb. During a fire, this edging expands to seal the room.