New Zealand · Dimond

Dimond corrugate calculator

762 mm cover, 8° cladding pitch, drainage check after 15 m.

Job name

Profile Dimond Corrugate

NZS 3604 wind zone Override cover (mm) Sheet length cap (m) Waste override (%)

Standard 16.5 mm corrugate. CoP min cladding pitch 8°. Check drainage after 15 m of run.

Section name

Form Plan length (m along ridge) Eave-to-eave span (m) Pitch (degrees) Eave overhang (m) Barge / verge overhang (m) Valley count

Supplier pricebook (optional)

Sheet $/lm Ridge $/lm Barge $/lm Valley $/lm Underlay $/m²

Your rates, GST exclusive. Totals add 15% GST. Hip flashing uses the ridge rate.

Takeoff

Check before order

Sloped area: 79.55 m²
Sheets: 28 @ 3.95 m
Cover: 762 mm · 8°
Waste: 5% → 83.53 m²
Ridge / hip: 10.10 / 0.00 lm
Barge / valley: 15.75 / 0.00 lm
Flashing cover: Cat A · ridge 130 mm · barge 75 mm

Dimond Corrugate sheetsCover 762 mm · length 3.95 m (rounded up 50 mm from 3.938 m) 28 sheets
Sheet lineal metres 110.28 lm
Underlay (10% lap allowance) 87.60 m²
Ridge flashing (130 mm cover) 10.10 lm
Barge flashing (75 mm profiled cover)2 upstands (CoP corrugate Cat A) 15.80 lm

Pitch is at or near the minimum

Low-pitch roofs need more flashing cover, more care at side laps, and a drainage check. Confirm as-laid pitch after deflection.

Cladding pitch is not design pitch

NZMRM CoP 7.1.1A: tabulated minimums are roof cladding pitch, not the building-design roof pitch. Wide purlin or portal spacing can leave the as-laid pitch below the table even when the drawings say otherwise.

This is a takeoff, not a quote

Numbers assume rectangular planes, constant pitch, sheets laid ridge-to-eave, and published nominal cover widths. Hips, valleys, penetrations, stop-ends, and end laps change the order. Confirm on the current product sheet and the latest CoP at metalroofing.org.nz.

Spec this page uses

Cover: 762 mm
Overall sheet width: 851 mm
Rib height: 16.5 mm
Min cladding pitch: 8°
Check run: 15 m
Source: Dimond Corrugate product data; NZMRM CoP 7.1.1A corrugate 16.5 mm

FAQ

What cover width does Dimond corrugate use?

762 mm cover and 851 mm overall. Count sheets from 762 mm. Using 851 mm under-orders the roof.

What is the minimum pitch?

8° cladding pitch for 16.5 mm corrugate, then check drainage after 15 m. That is CoP 7.1.1A. The degrees on the truss drawing are design pitch.

Dimond corrugate calculator

Spec this page uses

FAQ

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