Exterior Timbers

Durable hardwood and softwood timbers

Rosenfeld Kidson stocks a large range of specialist exterior joinery and construction timbers.

These include durable and stable softwoods such as Western Red Cedar, Alaskan Yellow Cedar and H3 treated Radiata for window and door joinery, exterior cladding and mouldings, as well as Cedar posts and beams for pergolas and the like.

Durable hardwoods such as our FSC® 100% certified South American hardwoods Garapa and Tonka; as well as Iroko, Kwila, Jarrah and Vitex are used in a kiln-dried condition for exterior joinery applications and as decking, handrails and pergolas.  They are also used for more general construction in a green or air-dry condition.  Click for more information on our Decking timbers.

As the premium species for exterior joinery applications, Western Red Cedar is available in a number of grades both air-dried and kiln-dried timber in a wide range of sizes up to 300mm wide and 200mm thick.  It is available in many weatherboard and panelling profiles, as a finger-jointed product and as shingles or shakes for roof and wall cladding.  For more information on our Cedar weatherboard cladding go to our Cedarscreen website, or follow this link for information on Cedar Shingles and Shakes.

Alaskan Yellow Cedar, Garapa, Tonka, Vitex, Iroko, Jarrah, Kwila, H3.2 Radiata Pine (exotic), Western Red Cedar

Our experienced sales team look forward to discussing your exterior joinery and construction timber needs and providing sound recommendations for you requirement Contact us.


Cedar size chart

Nominal Size (Finished Size)

50x22

(45x18)

75x22

(65x18)

100x22

(90x18)


150x22

(140x18)

200x22

(180x18)

250x22

(230x18)

50x25

(45x19)

75x25

(65x19)

100x25

(90x19)


150x25

(140x19)

200x25

(190x19)

250x25

(230x19)

300x25

(280x19)

50x45

(45x39)

75x45

(65x39)

100x45

(90x39)


150x45

(140x39)

200x45

(180x39)

250x45

(230x39)


50x50

(45x45)

75x50

(95x45)

100x50

(90x45)

125x50

(115x45)

150x50

(140x45)

200x50

(180x45)

250x50

(230x45)

300x50

(280x45)



100x75

(90x65)


150x65/75

(140x55/65)

200x75

(180x65)

250x75

(230x65)

300x75

(280x65)

100x100

(90x90)


150x100

(140x90)

200x100

(180x90)

250x100

(230x90)

300x100

(280x90)

150x150

(140x140)

200x150

(180x140)

200x200

(180x180)


Hardwood size chart

Nominal Size (Finished Size)

50x25

(45x19)

75x25

(65x19)

100x25

(90x19)

150x25

(140x19)

200x25

(180x19)

250x25

(230x19)

50x40

(45x32)

75x40

(65x32)

150x40

(140x32)

200x40

(180x32)

250x40

(230x32)

50x50

(45x45)

75x50

(65x45)

100x50

(90x45)

150x50

(140x45)

200x50

(180x45)

250x50

(230x45)

300x50

(280x45)



100x75

(90x95)

150x75

(150x65)

200x75

(180x65)

250x75

(230x65)

300x75

(280x65)



100x100

(90x90)

150x100

(140x90)

200x100

(180x90)

250x100

(230x90)

300x100

(280x90)

150x150

(140x140)

250x150

(280x65)

200x200

(180x180)

250x250

(230x230)

300x200

(280x180)

300x300

(280x280)

Exterior Timbers Options