Two materials. One table. A source for every number.
Side-by-side comparisons of building materials, built from manufacturer warranties and data sheets, building codes and government research. No sponsored picks, no guessed prices.
Roofing
Documents, not opinions
Every row in a comparison links to the warranty, code section or study it comes from.
No price without a source
If no citable source publishes a cost, the page says so instead of estimating one.
Dated and corrected
Each page shows when its sources were last checked. Errors are fixed and dated.