NZBC H1/AS1 6th Edition · Construction R-value · NZS 4214
Construction R-value Calculator
Every construction is the same stack, outside to inside. Framing layers split into the path through the timber and the path beside it.
infoMaterial, air-gap and surface values are provisional defaults you can overwrite on every row. Confirm each against your own copy of NZS 4214 before a figure goes into a consent.
Paragraph 2.1.2.11 minimums: roof R2.60 · wall R1.00 · suspended floor R1.30; slab on ground has none. Table 2.1.2.12 applies only to heated elements: ceiling R6.60 · wall R2.90 · heated floor R2.50 (zones 1–3) / R2.80 (zone 4) / R3.00 (zones 5–6). Construction R-values by isothermal planes, NZS 4214 as modified by H1/AS1 2.1.3.2. Guide: Why R2.8 batts make an R1.67 wall. Your project data stays in your browser; page visits are counted anonymously with GoatCounter (no cookies). Open source (MIT) — source code. Something missing or wrong? Request a feature or report a problem, or email pitayadesign.ezbuild@gmail.com.