ROCKWOOL manufactures stone wool insulation for thermal performance, sound control, moisture resistance, and noncombustible fire performance. Builders, contractors, architects, and homeowners can source ROCKWOOL insulation products through Golden State Lumber and Showroom for energy-efficient homes, commercial buildings, sound control, and thermal performance upgrades across Northern California.





The ROCKWOOL Group is the world’s leading manufacturer of stone wool insulation. We offer a full range of high-performing and sustainable insulation products for the construction industry.
Our insulation products are based on innovative stone wool technology and today we are the world’s leading manufacturer of stone wool insulation. By using stone, one of the world’s most abundant natural resources, you can make a lasting impact across generations.
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Golden State Lumber has been serving Northern California builders, contractors, architects, and homeowners for decades. We combine quality building materials with knowledgeable service to help customers find the right products and solutions for projects of every size.
Many customers return because they value consistent service, knowledgeable support, and access to quality building materials and trusted brands. Our goal is to build long-term relationships by helping customers complete successful projects, no matter the size.
If you don’t see the product you need, contact our team. Through our extensive supplier network, we can often source specialty, custom, and hard-to-find products and help you find the best solution for your project.