At Murdock Roof Trusses we design, manufacture and supply SpaceRafters. A SpaceRafter has a metal web design which allows for insulation, which increases thermal performance. SpaceRafters reduces time onsite and can made pre-insulated, reducing overall costs. Contact Murdock Roof Trusses for more information on Roof Trusses, Space Joists, or SpaceRafters. You can contact your local Murdock Builders Merchants branch also.