EXAMPLE AT A GLANCE
This fictional Cardiff flat roof membrane replacement project has 7 itemised lines and an illustrative £13,543.64 total. The app-exported PDF, first-page preview, measurement basis, scope boundaries and matching UK estimating guide let you inspect every quantity and rate.
What this example covers
This fictional job is set in Cardiff and concerns one low-slope extension roof. Replace the waterproof membrane on one accessible low-slope extension roof with defined edge and outlet details. The estimate is a bounded document: the customer should be able to compare the described work with its measured lines, product allowances and exclusions. The matching UK guide explains how to prepare those inputs.
- Prepared by
- Cedar & Beam Builders · fictional business
- Prepared for
- Jordan Taylor · fictional customer
- Example location
- Cardiff, UK
- Issued / valid through
- 25 September 2026 / 25 October 2026
Itemised flat roof membrane replacement example
These 7 lines reproduce the app-exported PDF exactly. The largest is Membrane installation at £4,365.66; this is one fictional component, not a typical price. Read each quantity with its unit: area, length, time, count and lump sum describe different work and must not be interchanged.
| Work item | Quantity | Unit rate | Amount |
|---|---|---|---|
| Access and temporary weathering | 1 lump sum | £520.00 | £520.00 |
| Old membrane removal | 39 sq m | £51.67 | £2,015.13 |
| Deck preparation | 39 sq m | £34.44 | £1,343.16 |
| Membrane system allowance | 42.7 sq m | £94.70 | £4,043.69 |
| Membrane installation | 39 sq m | £111.94 | £4,365.66 |
| Upstands and outlet details | 1 lump sum | £920.00 | £920.00 |
| Waste and final check | 1 lump sum | £336.00 | £336.00 |
| Illustrative total | £13,543.64 | ||
The table separates the named product or material allowances from labour and site tasks wherever the scope needs that distinction. Before replacing a rate, check whether the product allowance includes delivery, waste, fixings and the selected specification.
How the total is calculated
Old membrane removal is 39 sq m × £51.67 = £2,015.13. Deck preparation is 39 sq m × £34.44 = £1,343.16. The other lines follow the same calculation and sum to £13,543.64. Each fixture line lands on an exact penny, so the native PDF total equals the sum of the displayed line amounts.
Measurement to check: Measure net roof area, upstands, penetrations, drainage falls and perimeter edge length. Selection to check: Identify membrane system, insulation if selected and outlet components separately. The 0% tax field and zero markup are example document inputs, not an instruction for a live quote. Decide the correct settings for your own business and job.
Assumptions and exclusions
Inspect deck condition after stripping and maintain temporary weather protection.
Outside this stated scope: No roof deck reconstruction, structural falls correction or interior repairs.
A wet or unsound deck changes replacement quantity and system specification. A changed condition should lead to a newly measured quantity, explicit revised allowance or separately agreed task. Keep the customer informed of which figure changed and why before producing another PDF.
Download the app PDF
The document was exported from Estimates using the fictional business, client, dates, short PDF scope, notes and cost lines above. Its first page appears below. Download the complete PDF to inspect every entry and its presentation; no listed rate is a current Cardiff market claim.
Make an estimate for your own job
- Write the actual work boundary and exclusions. Use this measurement basis: Measure net roof area, upstands, penetrations, drainage falls and perimeter edge length.
- Confirm the selected products and access conditions. Record this selection decision: Identify membrane system, insulation if selected and outlet components separately.
- Replace every fictional product, labour and subcontractor rate with your own evidence.
- Check line extensions, total, tax and markup settings, customer details and validity date.
- Preview every PDF page before sharing the estimate with the customer.
- Measure net roof area, upstands, penetrations, drainage falls and perimeter edge length.
- Identify membrane system, insulation if selected and outlet components separately.
- Inspect deck condition after stripping and maintain temporary weather protection.
- A wet or unsound deck changes replacement quantity and system specification.
Read the matching estimating guide for the project-specific measurement and work sequence.
Questions about this job
Which quantity controls this flat roof membrane replacement estimate?
Measure net roof area, upstands, penetrations, drainage falls and perimeter edge length.
When should this flat roof membrane replacement quote be revised?
A wet or unsound deck changes replacement quantity and system specification. No roof deck reconstruction, structural falls correction or interior repairs.
MAKE THE EXAMPLE YOUR OWN
Build a flat roof membrane replacement estimate
Use Estimates on iPhone or Android to enter your measured scope and line items. Review the result carefully and export a PDF for the actual job.
