About 4 Building Materials
How 4 Building Materials selects topics, names authors, cites standards and manufacturer documentation, and keeps published guidance current.
4 Building Materials publishes guidance for people who have to specify, compare, or buy building materials and want to see the reasoning behind a recommendation.
What readers should expect
Every guide states the decision it is meant to support, names an accountable author, carries a visible publication date, and cites the standards, test methods, or manufacturer documentation behind any claim that matters. Where a figure depends on grade, thickness, exposure class, or local code, the guide says so instead of quoting a single number as universal.
What we do not do
We do not publish specifications we have not traced to a source, and we do not present a manufacturer’s marketing figure as an independent test result. Performance values change between product revisions and between jurisdictions, so a published number is a starting point for verification, not a substitute for the current datasheet.
Scope and limits
Nothing here is a structural, fire, or code compliance opinion for a specific project. Materials must be verified against the governing code, the project specification, and the current manufacturer documentation for the product actually being supplied.
Contact
Corrections, source updates, and questions about a published claim go to the editorial address in the site footer. Requests that identify the page and the disputed sentence are handled fastest.