Big Sky Lumber Supply offers a wide variety of siding options including real-wood siding such as Fir, Cedar, or Log lap siding, as well as T-1-11 siding panels.  We also offer Prefinished or Primed Diamond Kote LP, Northwest Factory Finish LP, and Northwest Factory Finish James-Hardie siding options!

Diamond Kote

Diamond Kote® Building Products leads the industry as the #1 brand of pre-finished LP® SmartSide®, backed by a 30-Year No Fade Finish Warranty. Choose from 30 colors or create a custom color; the possibilities are endless. Their products are exclusively built on LP®SmartSide® and treated with a SmartGuard® process to withstand extreme temperatures, high humidity, freeze/thaws, fungal decay, heavy weather such as hail, and termites. Their engineered wood siding system was designed to hide nail heads, eliminate blemishes, and provide a more efficient installation. The 5-Year Labor/50-Year Substrate Limited Warranty provides peace-of-mind protection for decades to come.  To learn more about this amazing siding product, click the Diamond Kote hyperlink name above.

Northwest Factory Finishes

Northwest Factory Finishes has emerged as the leader in the field of pre-finishing building materials in the Pacific Northwest. From composite lap siding to panels, trim, soffit, and fascia, their team is working 16 hours a day to provide the best pre-finished building products available. For over 20 years we have been continually evolving, which has lead to the development of specialized equipment and innovative processes to make their finish stand out among rest in look and durability.  Click on the Northwest Factory Finishes hyperlink name above to learn more.


Traditional and timeless. Sleek and strong. HardiePlank® lap siding is a best-selling product. It’s the most popular brand of cement siding in North America, protecting and beautifying more homes from coast to coast. All styles are engineered to withstand different climates and all the elements.   James-Hardie siding products come primed, or with baked-on ColorPlus® Technology. To learn more about James-Hardie, click the hyperlink name above to learn more