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May 12, 2026
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Project Hub
Roofing Estimating
Estimate shingles, felt, and battens with overlaps, laps, pitch effects, and edge waste treated as real buying factors instead of afterthoughts.
Roofing4 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
See how the site is maintained
Read the calculator methodology and editorial policy for the standards behind these pages.
Match the roof covering to the real roof shape
Roofing quantities often change once overlaps, laps, ridge details, and smaller outbuilding layouts are considered. This project hub separates shingles, felt, and battens so you can estimate the roofing layer that actually matches the job.
Roofing Shingle Calculator
Estimate roofing shingle bundles and rough cost from roof coverage area.
Roof Felt Calculator
Estimate roof felt rolls and rough cost for sheds, garages, and outbuildings.
Shed Felt Calculator
Estimate shed felt rolls and rough cost for sheds, summerhouses, and small outbuildings.
Roof Batten Calculator
Estimate batten lengths, pieces, and rough cost for roof work.
What changes roofing orders most
Overlaps, roof pitch, edge waste, verge details, and how the roof breaks into courses or stock lengths usually matter more than the clean plan area alone.
Where people under-order
Small roofs often look simple, but laps, ridge details, edges, and extra rolls or bundles for awkward cuts can move the final order quickly.
Before you order
Check effective product coverage, overlap rules, fixings, edge trims, and whether underlay, battens, or accessories need their own quantity check.
Quick roofing quantity pages
Use these pages when you already know the roof area or total batten run and want a faster route into bundles, rolls, or stock lengths.
Roofing Shingle Calculator by Area
Work out how much Roofing Shingle you need from the measured area and a realistic waste allowance.
Roofing Shingle Buying Guide
Work out a sensible buying quantity for Roofing Shingle before you order.
Roof Felt Calculator by Area
Work out how much Roof Felt you need from the measured area and a realistic waste allowance.
Roof Felt Buying Guide
Work out a sensible buying quantity for Roof Felt before you order.
Roof Batten Length Calculator
Work out how much Roof Batten you need from total run length, stock size, and a practical cut allowance.
Roof Batten Buying Guide
Turn the measured run into a sensible order for Roof Batten before you buy stock lengths.
Shed Felt Calculator by Area
Work out how much Shed Felt you need from the measured area and a realistic waste allowance.
Shed Felt Buying Guide
Work out a sensible buying quantity for Shed Felt before you order.
Shed Roof Felt Calculator
Estimate shed roof felt rolls for sheds, workshops, and garden buildings.
Roofing guides and buying checks
These pages help with overlap, effective coverage, stock lengths, and the parts of roofing work that usually create the most waste.
Roofing Shingle Coverage Guide
Understand how effective Roofing Shingle coverage changes the final order quantity.
Roofing Shingle Waste and Overlap Guide
See how edges, overlaps, and cuts affect Roofing Shingle quantities.
Roof Felt Coverage Guide
Understand how effective Roof Felt coverage changes the final order quantity.
Roof Felt Waste and Overlap Guide
See how edges, overlaps, and cuts affect Roof Felt quantities.
Roof Batten Length Guide
Understand how stock lengths and roof geometry change the final order.
Roof Batten Waste and Joins Guide
See how joins, trimming, and roof detail affect length-based roofing materials.
Shed Felt Coverage Guide
Understand how effective Shed Felt coverage changes the final order quantity.
Shed Felt Waste and Overlap Guide
See how edges, overlaps, and cuts affect Shed Felt quantities.
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 Roofing Estimating project hub if the quote depends on more than one material.