Building Material

Engineered Wood Products Glued laminated timber is manufactured by bonding multiple layers of dimension lumber together with structural adhesives. The laminating process produces members that are stronger and more dimensionally stable than solid-sawn timber. The glulam beams can be manufactured in curved shapes for architectural applications. The design values for glulam are determined by the […]

Insulation Material Types Fiberglass insulation is the most common type, available in batts for standard stud spacing and blown-in for attics and irregular spaces. The R-value of fiberglass is approximately 3.2 per inch. Cellulose insulation made from recycled paper provides an R-value of 3.7 per inch and better air sealing properties. Spray foam insulation in

Structural Glass Design Structural glass systems use glass as a load-bearing element in buildings, typically for fins, beams, and columns that support glass facades and canopies. The structural glass must be laminated with interlayers of polyvinyl butyral or SentryGlas to provide post-breakage strength. The design of structural glass elements must consider the tensile strength of

Plaster and Stucco Systems Gypsum plaster has been used for interior wall finishes for centuries, providing a smooth, durable surface. Modern gypsum plaster is applied in three coats over metal lath or gypsum lath. The scratch coat is applied first and scratched to provide a key for the brown coat. The brown coat builds the

Composite Materials in Construction Composite materials combine two or more constituent materials with different properties to create a material with enhanced performance characteristics. Fiber-reinforced polymers are the most widely used composite materials in construction, consisting of high-strength fibers embedded in a polymer resin matrix. The fibers provide the strength and stiffness, while the resin transfers

Aggregate Properties and Testing Aggregates are the most widely used construction materials in the world, with annual consumption exceeding 50 billion tons globally. They form the structural framework of concrete, asphalt, and unbound pavement layers, providing the primary load-bearing component in these composite materials. The properties of aggregates that affect their performance include gradation, particle

Wood Species and Properties The selection of wood species for construction projects significantly affects the strength, durability, appearance, and cost of the finished structure. Softwood species from coniferous trees are the primary structural materials in North American construction. Douglas fir is one of the strongest softwoods available, with a modulus of elasticity of 1.9 million

Insulation Materials and R-Values Thermal insulation slows heat transfer through building envelope assemblies, reducing heating and cooling energy consumption. The R-value measures thermal resistance, with higher values indicating better insulation performance. Fiberglass batts with R-values of R-13 for 2×4 walls and R-19 for 2×6 walls are the most common insulation type. Blown-in cellulose with R-3.7

Attic Insulation Materials Fiberglass batt insulation is the most common attic insulation material, available in standard widths to fit between joist spacing. Batts are manufactured in R-values from R-11 to R-49 depending on thickness. The effectiveness of batt insulation depends on proper installation with full contact with the air barrier, no gaps or compression, and

High-performance concrete (HPC) is a specialized concrete designed to achieve performance characteristics that exceed those of conventional concrete through the careful selection and proportioning of materials, optimized mix design, and rigorous quality control. Unlike conventional concrete, which is typically specified by compressive strength alone, high-performance concrete is designed to meet specific performance requirements including high