Code 3 Lead
Code 4 Lead
Code 5 Lead
Code 6 Lead
Lead Weight Calculator
Calculate approximate rolled lead sheet weight by selecting the lead code, width, roll length and quantity. Figures are based on the nominal lead weights from The Lead Lads lead weight chart.
Estimated material weight
Approx. 2.25kg per linear metre · 6.74kg per roll
Calculate Rolled Lead Sheet Weight Before Ordering
Use the lead weight calculator to estimate the nominal weight of rolled lead sheet by lead code, width, length and quantity. It provides roofers, builders, surveyors and trade buyers with a quick way to check individual roll weights and total material loads before placing an order.
Once you have calculated the approximate weight, use the Lead Flashing Chart to compare available codes, widths and roll lengths, or browse the complete rolled lead sheet range.
How the Lead Weight Calculator Works
Rolled lead sheet codes correspond to nominal sheet thicknesses and weights per square metre. The calculator multiplies the relevant weight per square metre by the selected sheet area and quantity.
1. Select the Lead Code
Choose Code 3, Code 4, Code 5, Code 6, Code 7 or Code 8. Each lead code has a different nominal thickness and approximate weight per square metre.
2. Enter the Sheet Dimensions
Enter or select the width and length of the roll required for the flashing, apron, valley, gutter, bay or other leadwork detail.
3. Review the Estimated Weight
The calculator estimates the weight per linear metre, the weight of each roll and the combined material weight for the selected quantity.
Why Calculate Lead Sheet Weight?
Knowing the approximate weight before ordering can help with purchasing, delivery planning, lifting arrangements, site storage and material scheduling. It is especially useful for larger rolls and multi-roll orders where individual and combined weights may be substantial.
- Check whether rolls can be safely handled on site
- Estimate the combined delivery load
- Compare different widths and roll lengths
- Prepare project material schedules
- Check approximate quantities before ordering
- Plan secure storage for valuable lead materials
Selecting the Correct Lead Code
Weight is only one part of the specification. Lead code selection must also reflect the type and dimensions of the detail, exposure, support, fixing arrangement and allowance for thermal movement. A heavier code should not be treated as an automatic upgrade.
Common Flashing and Roofing Codes
- Code 3 Lead — commonly associated with concealed soakers and selected lightweight details.
- Code 4 Lead — widely used for many conventional chimney, cover, stepped and abutment flashings.
- Code 5 Lead — used for suitably designed heavier weatherings and more demanding details.
Heavier Lead Codes and References
- Code 6 Lead — used for appropriate exposed, larger or specialist details.
- Code 7 Lead — specialist heavier rolled lead sheet.
- Code 8 Lead — the heaviest standard code within the usual rolled lead sheet range.
- Lead Weight Chart — compare nominal thicknesses and weights.
Understanding Width, Length and Total Sheet Area
The weight of a lead roll increases in direct proportion to its width and length. Doubling the width or length will approximately double the weight, provided the lead code remains the same.
When measuring lead for flashing, calculate the complete developed width of the detail. This may include the chase, upstand, roof cover, folds, laps and returns—not only the visible face once the lead has been dressed.
What to Order With Rolled Lead Sheet
The sheet itself is usually only one part of a complete leadwork material package. Ordering compatible fixings, underlays, treatments and tools at the same time can reduce delays once work begins.
Leadwork Fixings
Browse copper nails, clips, wedges and associated items used to secure properly designed flashing and weathering details.
Shop leadwork fixingsLead Underlay
Select suitable underlays or separating layers for applications where the detail and substrate require them.
Shop lead underlayPatination Oil
Apply patination oil in accordance with the product instructions to help reduce uneven carbonate staining after installation.
View the patination oil guideTechnical Leadwork and Roofing Support
Use The Lead Handbook for further guidance on rolled lead sheet, lead codes, flashing details, thermal movement, substrates, fixing and maintenance.
For practical leadwork guidance and installation services, visit The Lead Lads®. For larger, heritage or technically complex roofing work, see Neal Roofing leadwork services. For independent roof inspections and defect reporting, visit Strut Building Surveyors.
Lead Weight Calculator FAQs
How do I calculate the weight of rolled lead sheet?
Multiply the nominal weight per square metre for the selected lead code by the sheet width in metres, the length in metres and the number of rolls. The calculator performs this calculation automatically.
Which lead code should I use for flashing?
Code 4 lead is widely used for many conventional flashing details, while Code 3 is commonly associated with concealed soakers. Code 5 and heavier codes may be used for suitably designed applications requiring thicker sheet. Final selection should reflect the dimensions, exposure, support, fixing and movement requirements of the detail.
Does the calculator include packaging and pallet weight?
No. The result estimates nominal lead material weight only. Packaging, pallets, roll cores and lifting or handling equipment must be considered separately.
Will the actual roll weight exactly match the calculation?
Not necessarily. Rolled lead sheet is manufactured within permitted tolerances, so the actual weight may differ slightly from the nominal calculated figure.
Can I calculate the weight of several lead rolls?
Yes. Enter the number of identical rolls required in the quantity field. For mixed widths, lengths or lead codes, calculate each product separately and combine the totals.
Can I order rolled lead sheet after using the calculator?
Yes. Use the Lead Flashing Chart or rolled lead sheet category to select the required lead code, width and roll length, then add the products and accessories to your basket.
Ready to order? Confirm the lead code, width, length, quantity and approximate weight, then select the corresponding rolled lead sheet.
