Tools

R-Value & Dewpoint Visualiser

Build a wall, roof, or floor assembly layer by layer. Calculate total thermal resistance and screen for interstitial condensation risk using the Glaser method.

NZS 4214 · ISO 13788

Zone Finder

Search any NZ or Australian address for its climate zone and design conditions. NZ addresses also return earthquake zone, wind zone, and council ePlan links.

LINZ · NZS 1170.5

H1 Compliance Checker

Check assembly R-values and glazing area against NZBC H1 schedule method minimums for your climate zone and building type.

H1/AS1 5th Ed

Floor Joist Spans

Look up maximum joist spans by size, spacing, grade, and load for timber-framed residential floors.

NZS 3604 §7

Bearer Spans

Bearer sizing and span lookup for subfloor bearers supporting joist loads to piles.

NZS 3604 §6

Rafter Spans

Maximum rafter spans for light and heavy roofs by timber size, spacing, and grade.

NZS 3604 §10

Lintel Spans

Lintel member sizing for openings, indexed by loaded dimension and roof weight.

NZS 3604 §8

Stud Sizing

Wall stud sizing based on height, spacing, and whether the stud carries floor, roof, or both loads.

NZS 3604 §8

Verandah Beam Spans

Maximum spans for verandah and carport beams by roof load and post spacing.

NZS 3604 §8

Bracing Demand

Wind and earthquake bracing demand calculation for timber-framed buildings per NZS 3604.

NZS 3604 §5

Cantilevered Joist

Back-span and cantilever limits for cantilevered floor joists and balcony projections.

NZS 3604 §7

Deck Design

Joist, bearer, and post sizing for residential timber decks with balustrade loading.

NZS 3604 · B1

Wind Pressure

Site wind speed and design wind pressure from region, terrain category, and topography.

AS/NZS 1170.2

Stair Calculator

Riser, tread, pitch, and stair configuration from floor-to-floor height. 2D and 3D visualisation per D1/AS1.

NZBC D1 · BU625

Window U-Value

Whole-window U-value estimation from glazing type, frame material, and spacer configuration.

NZS 4218 · H1

H1 Glazing Trade-Off

Trade glazing area against wall and window R-values under the H1 schedule method.

H1/AS1

Treated Timber

Hazard class lookup for timber elements based on location, exposure, and element type.

NZS 3602

Dissimilar Material Checker

Check compatibility of metals and materials in contact to prevent galvanic corrosion.

NZS 3604 · E2

Masonry Wall

Concrete masonry wall thickness, reinforcing, and bracing checks for residential construction.

NZS 4229

Sanitary Drainage

Fixture unit counts and pipe sizing for sanitary drainage systems.

AS/NZS 3500 · G13

Gutter & Downpipe

Gutter and downpipe sizing from catchment area, rainfall intensity, and gutter profile.

E1/AS1

Loaded Dimension

Interactive diagram explaining tributary load widths for span table lookups.

NZS 3604

House Viewer

Interactive 3D model of a small house. Toggle components and highlight structural elements.

NZS 3604 · 3D

Product Library

Database of building materials with thermal conductivity and vapour resistance values.

BRANZ · Manufacturer data