Design Pine H3 Door Jambs
Primed H3 External Door Jambs in Single and Double Rebate
Framing an external doorway, replacing a weathered jamb, or fitting doors to a laundry or garage? Design Pine H3 door jambs come pre-primed and treated for above-ground exterior use, so the frame goes in ready for a topcoat. We stock finger jointed H3 jambs in 138×30, 163×30, 138×42, 163×42 and 185×42, in single and double rebate, in 5.2m and 5.4m lengths.
Sizes and Rebates for the Opening
Match the jamb to the wall and the door. The 138×30 comes in single and double rebate in 5.2m, with 163×30 double rebate for wider walls. For heavier external doors, the 42mm range runs 138×42 and 185×42 in single and double rebate, plus 163×42 double rebate, all in 5.4m. Choose single rebate for a door closing from one side, and double rebate where doors hang on both faces of the opening or the wall build-up is thicker.
Why Design Pine H3 for External Jambs
Design Pine is plantation grown Radiata pine, finger jointed for straightness and stability in a frame that has to keep a door hanging square. It is treated with a preservative for above-ground protection against rot, decay and wood-boring insects, and factory primed with a primer compatible with Australian topcoats, so the jamb needs only its finish coats once installed. Match the rest of the exterior with our Design Pine H3 weatherboards and cladding, hang the door from our doors range, or see the full door jambs range for primed pine and Maple.
H3 Jambs Primed and Ready for the Topcoat
- 30mm and 42mm jambs: 138×30 to 185×42 for standard and heavier external doors.
- Single and double rebate: For doors closing from one side or hung on both faces.
- 5.2m and 5.4m lengths: Enough for full jamb legs and heads with fewer joins.
- Delivered across Sydney: Sydney, the Blue Mountains, Wollongong, and the Central Coast, or click and collect from Arndell Park.
From a single back door to every external opening on a build, the H3 jamb is in stock.
Call 1300 554 775 or request a quote online and our team will match jamb size and rebate to your doors.
Frequently Asked Questions
What is an H3 door jamb?
An H3 door jamb is treated for above-ground exterior use, making it suited to external doorways exposed to weather. Design Pine H3 jambs are also pre-primed, ready for a topcoat.
Can Design Pine H3 door jambs be used externally?
Yes. Design Pine H3 is treated for above-ground exterior use, which covers external door frames. Paint the jamb with a quality topcoat once installed.
What sizes do Design Pine H3 door jambs come in?
BBS stocks Design Pine H3 jambs in 138×30, 163×30, 138×42, 163×42 and 185×42, in single and double rebate, in 5.2m and 5.4m lengths.
Are Design Pine door jambs finger jointed?
Yes. Design Pine H3 door jambs are finger jointed Radiata pine, which keeps the lengths straight and stable.
Do primed door jambs need painting?
Yes. A primed jamb still needs a topcoat. The Design Pine primer is compatible with Australian solvent-based and acrylic topcoats.