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May 12, 2026
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Project Hub
Roofline Estimating
Roofline jobs usually involve several linked products rather than one single quantity. Use this project hub to split the job into fascia, soffit, guttering, and downpipes so each part can be measured and ordered in a more practical way.
Roofline5 calculatorsGuides and quote prep included
How to use it
Planning before buying
Use this project hub for a planning check, then confirm the final order or quote against live product data and site conditions.
Why trust it
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Read the calculator methodology and editorial policy for the standards behind these pages.
Break the roofline into the parts you are buying
Roofline jobs usually involve several linked products rather than one single quantity. Use this project hub to split the job into fascia, soffit, guttering, and downpipes so each part can be measured and ordered in a more practical way.
Fascia Calculator
Estimate fascia board lengths and rough cost from roofline runs.
Soffit Calculator
Estimate soffit board quantities and rough cost for roof edges.
Gutter Calculator
Estimate gutter lengths, stock pieces, joints, waste allowance, and rough material cost for simple roofline runs.
Gutter Guard Calculator
Estimate gutter guard lengths, pieces, and rough cost for roof edge protection.
Downpipe Calculator
Estimate downpipe lengths and pieces for drainage runs.
What changes a roofline order most
Corners, joints, stop ends, outlets, and how the stock lengths break across the run usually matter as much as the total measured length.
Where people under-order
It is common to count the straight runs but forget outlets, brackets, trims, and the extra pieces created by corners or changes in level.
Before you order
Check stock lengths, fittings, corner pieces, and whether fixings or joint trims need to be bought separately from the main boards or gutters.
Quick roofline quantity pages
Use these pages when you already know the run lengths and want a fast route into boards, gutters, or downpipe quantities.
Fascia Length Calculator
Work out how much Fascia you need from total run length, stock size, and a practical cut allowance.
Fascia Buying Guide
Turn the measured run into a sensible order for Fascia before you buy stock lengths.
Soffit Length Calculator
Work out how much Soffit you need from total run length, stock size, and a practical cut allowance.
Soffit Buying Guide
Turn the measured run into a sensible order for Soffit before you buy stock lengths.
Gutter Length Calculator
Work out how much Gutter you need from total run length, stock size, and a practical cut allowance.
Gutter Buying Guide
Turn the measured run into a sensible order for Gutter before you buy stock lengths.
Downpipe Length Calculator
Work out how much Downpipe you need from total run length, stock size, and a practical cut allowance.
Downpipe Buying Guide
Turn the measured run into a sensible order for Downpipe before you buy stock lengths.
Gutter Guard Length Calculator
Work out how much Gutter Guard you need from total run length, stock size, and a practical cut allowance.
Gutter Guard Buying Guide
Turn the measured run into a sensible order for Gutter Guard before you buy stock lengths.
Use this project hub to brief suppliers or installers
Work through the core calculator first, then use the linked guides and quote checklist to request cleaner, more comparable prices.
- Confirm what the quote should include: materials only, labour only, or both.
- State access, finish level, timing, and any unknowns clearly.
- Ask each supplier or installer to price the same scope and exclusions.
You can also open the wider Roofline Estimating project hub if the quote depends on more than one material.