Large seaside home construction with Rmax weatherization wrapping

Rmax

Rmax manufactures rigid foam insulation and wall sheathing products used in commercial and residential building envelope assemblies. Golden State Lumber and Showroom supplies Rmax insulation products for energy-efficient homes, commercial buildings, sound control, and thermal performance upgrades throughout Northern California.

  • Thermasheath-3
  • ECOMAXci
  • Durasheath-3
  • TSX-8500
  • Polyiso insulation boards
  • And more

Inspiration

About The Brand

Since 1978, Rmax has been creating insulation solutions based on the latest building science. Our full line of high-quality, polyiso-based wall, roof and specialty insulation products for commercial, industrial and residential applications delivering maximum R-values and minimum environmental impact, with efficiency in installation, cost and design.

Rmax insulation has been designed and tested to provide building envelopes with superior insulating protection while meeting the newest codes and requirements. Rmax’s engineered products and solutions allow for ultimate efficiency through multiple design options, creating ease of construction and reduced energy usage. This leads to a better building envelope while adding to the bottom-line through both material and labor savings – making Rmax an excellent choice for commercial and residential applications.

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Document Library

Find technical specifications, installation guides, warranty information and more. Simply search by brand or product category to refine your search and access the support you need. Can’t find what you’re looking for? Contact your Golden State Lumber + Showroom professional.

FAQ

Got questions? We’ve got you—check out our quick answers below.

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.