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Gable Roof Framing Calculator - With Running Set-out Points - Metric

? From outside of wall to outside of wall (long side) Wall Length Rafter Thickness ? From outside of wall to outside of wall (short side) Wall Width Rafter Depth Roof Angle Ridge Thickness Overhang (level) Ridge Depth Overhang Gable Max Rafter Spacing End Rafters Set-in Wall Height ? Equal Spacing adjusts to nearest UNDER or equal to entered spacing Exact Spacing keeps entered spacing and adjusts 2 end ridge spaces if necessary Rafter Spacing Equal Exact Wall Thickness Birdsmouth Seat ? Extend Ridge Battens Batten Spacing ? Top Batten Set-in from top end of Rafter NOT Ridge Centre Top Batten Set-in Batten Width Bottom Batten Set-in First Bat Centre Batten Spacing Equal Exact

? Creates a link to save or Share current calculation Share this Calculation Scale Possible Alternate Equal Rafter Centres

For a good straight fascia, add an extra 20 mm or so to the tails of all your rafters (total length). After they're up, you can snap a line to mark and trim the tails in a nice straight line, to make up for any ridge warp or marking, cutting and fixing errors.





Left click, release then drag to measure at scale in diagram below - Enlarge diagram scale for more accurate measurements.

Angle Scale

Gable roof common rafter detail diagram with all dimensions and birds mouth

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Calculator Review: See more ... Thanks to your excellent gable roof calculator we, as first-timers, were able to quickly design a roof, estimate materials, and build within a week. Appreciate your tools and just placed a donation to your linked charity as well! Blue Dragon Children's Foundation

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