Envelope Notes is an independent, vendor-neutral desk covering home weatherization and insulation. It exists because most comfort complaints are not a furnace problem — they are an envelope problem.
Every measure on the wall is filed the same six ways: the area it covers, the R-value it targets, a typical cost band, the savings it tends to produce, how reachable the work is, and how long it lasts. That shared schema lets you compare an attic top-up, a wall cavity, and a door sweep on the same terms instead of taking a marketing claim at face value.
Our editors draw on long-standing building-science guidance about air sealing, moisture control, and R-value targets, and we frame everything as general education. We do not name or rank specific insulation product brands or contractors, and we make no promises about any particular energy bill or savings outcome.