Building Materials

A material cannot be evaluated apart from the assembly around it. Climate exposure, drainage, fastening, movement, transitions, maintenance, fire requirements, and installer capability often matter more than the sample board.

What this section covers

• Building-envelope fundamentals
• Exterior cladding and siding systems
• Rainscreens and drained wall assemblies
• Stone veneer and lightweight facade materials
• Fiber cement, stucco, metal, and composite panels
• Waterproofing membranes and insulation
• Material comparisons and specification questions

Start with building envelope basics before comparing finish materials. In wet regions, continue with building for rainy climates to connect material selection with drainage and drying.

Building envelope and exterior wall guides

• Building envelope basics — organize water, air, vapor, and thermal control layers before selecting finishes.
• Rainscreen wall systems — coordinate cavities, flashings, attachments, openings, fire, insects, and field verification.
• Exterior cladding guide — compare material families by exposure, structure, fire context, maintenance, and repairability.
• Pacific Northwest siding guide — evaluate wood, engineered wood, fiber cement, vinyl, metal, stucco, and related assemblies.

Material selection should also reflect the site’s exposure. Use the moisture-control guide for drainage and drying principles and the coastal construction guide for salt, corrosion, wind, and flood context.

How materials are reviewed

The editorial method separates product composition, tested performance, code classification, installation requirements, climate suitability, maintenance, and unresolved questions. Manufacturer literature is treated as a source for declared specifications, not independent proof of field performance.

See How We Review Materials for the full evidence and corrections process.