Editorial Policy

What we cover

One-component spray foam insulation kits, two-component canister systems, wide-spray cans, foam sealants by job, and the guns, cleaners and nozzles around them. Caulk, grout and pastes are out of scope whatever claim they carry. Products enter the record through a marketplace intake that we screen by hand; the intake decides what we look at first, never how a product scores.

What counts as evidence, in order

1. A technical data sheet from the maker with a date or a revision number on it.
2. A safety data sheet, a test report, a code evaluation report or a registration number that can be looked up.
3. A statement on the maker's own web store, quoted with its date.
4. A marketplace listing title or bullet, quoted with its date, and treated as the weakest source because it changes without notice.
5. Owner reviews, read for patterns and never as performance measurements. How we read them.

A claim that names a standard without a result, or a result without the tested thickness, is recorded as incomplete. A missing document is recorded as missing, which is a finding, not an oversight. We do not fill gaps with assumptions.

Scores and marks

Insulation kits carry a 100-point research rating built from documents, traceability, kit contents, price and feedback, with every awarded point and its reason printed on the product page, and a separate confidence level that never changes the arithmetic. Foam sealants carry four yes-or-no evidence marks instead, because half their makers publish nothing and a score built on nothing would look like knowledge; what the "claim checkable" mark tests differs by category and each category page says which. Guns, cleaners and nozzles carry neither: that page reports what each maker publishes and orders the list by feedback base, and it says so. All of these are statements about what is documented. None is a performance test.

What no one can buy

A position, an eligibility decision, a score, a mark, a softer sentence, or the removal of an open question. We accept no payment, product, sample, sponsorship or advertising from any maker or seller we cover. If that changes, the policy changes first and the page says so. See Ownership and conflicts.

How we write

US English, for owners and contractors. Every figure names its source and the date it was read. Prices are dated snapshots. We quote makers in their own words when the wording is the point. We say "we have not seen" when we have not seen, and we do not describe a product as unsafe, non-compliant or illegal on the basis of a missing document; the finding we publish is that the claim cannot be checked by the person buying it.

Who writes it

A small research desk that reads documents for a living and has no background as a manufacturer, laboratory, code official or contractor. That is stated on every page that could be mistaken for a test, and it is why the site links to the label, the data sheet and the local code rather than standing in for them. Makers who think we have read their documents wrong can send the documents; we answer every complete submission.