# How to estimate pitched roof covering replacement from scope to total Plan a UK pitched roof covering replacement estimate with measured scope, product choices and exclusions. Review 7 fictional GBP lines and the matching £18,599.94 PDF example. Canonical: https://quicklyestimates.com/en-gb/guides/how-to-estimate-roof-replacement/ Author: Estimates editorial team Published: 2026-09-25 Updated: 2026-09-25 Estimate pitched roof covering replacement by measuring the defined one accessible pitched roof, separating product allowances from labour and setting out the work sequence and exclusions. This fictional Manchester example uses 7 itemised lines totalling £18,599.94; its exact quantities and rates appear in the paired app PDF. THE ESTIMATING ANSWER Estimate pitched roof covering replacement by measuring the defined one accessible pitched roof, separating product allowances from labour and setting out the work sequence and exclusions. This fictional Manchester example uses 7 itemised lines totalling £18,599.94; its exact quantities and rates appear in the paired app PDF. The worked job is one accessible pitched roof in Manchester . The written scope is: Remove and replace the selected pitched roof covering on one defined roof, retaining sound supporting structure after inspection. Its matching itemised example (https://quicklyestimates.com/en-gb/samples/roof-replacement-estimate/) shows how that description becomes quantities, allowances and a PDF. These figures are fictional inputs for learning the method, so check the real site, specification and supplier or subcontractor costs before quoting. 1. Define the measured job Remove and replace the selected pitched roof covering on one defined roof, retaining sound supporting structure after inspection. Measure each roof plane, pitch, edges, penetrations and access; purchasing area differs from projected floor area. Record the measurements and existing condition in the estimate before turning quantities into line items. The scope should make clear why this is a separate project from a broader renovation or maintenance quote. Measure for this job: Measure each roof plane, pitch, edges, penetrations and access; purchasing area differs from projected floor area. Record the measured basis next to the relevant cost lines, since a room count, fitted length and purchased product quantity may each use a different unit. 2. Build a product and labour schedule Separate covering, underlay, flashings and ventilation allowances. This example has 7 distinct lines, including roof survey and access allowance, old covering removal, underlay allowance. Use actual supplier prices and labour inputs for a customer job; the displayed amounts are fictional document inputs. Choose before pricing: Separate covering, underlay, flashings and ventilation allowances. Keep a named allowance when the selection is open, and replace it once the actual product and delivery terms are known. 3. Sequence the work and handoffs Document safe access, weather protection and a staged tear-off before scheduling. Show which task depends on access, a selected product or another trade. If that dependency is still open, label the price preliminary and identify the information needed before a firm quote. Plan the handoffs: Document safe access, weather protection and a staged tear-off before scheduling. State which stage needs access or inspection before the next can begin, especially if a concealed condition might stop the work. 4. Set a change boundary Unsound decking or hidden water damage requires a revised structural repair line. The example excludes roof-framing replacement, solar array removal or concealed rot repair. Record the discovery, agree the revised work and update the estimate before adding it to the job. Change trigger: Unsound decking or hidden water damage requires a revised structural repair line. If this happens, write down the revised quantity and responsibility before adding an item to the customer estimate. Worked project calculation The paired PDF has 7 cost lines. For example, Old covering removal is 204 sq m × £15.50 = £3,162.00; Underlay allowance is 204 sq m × £8.18 = £1,668.72. Each amount is the stated quantity multiplied by its unit rate. Recheck whether a line describes installed work, a material purchase allowance or a distinct visit before changing its quantity. Pitched roof covering replacement example — GBP, fictional inputs Work item | Quantity | Unit rate | Amount | Roof survey and access allowance | 1 lump sum | £680.00 | £680.00 | Old covering removal | 204 sq m | £15.50 | £3,162.00 | Underlay allowance | 204 sq m | £8.18 | £1,668.72 | Selected covering allowance | 223 sq m | £28.42 | £6,337.66 | Covering installation | 204 sq m | £22.39 | £4,567.56 | Flashings and edges | 1 lump sum | £1,400.00 | £1,400.00 | Waste and final inspection | 1 lump sum | £784.00 | £784.00 | Illustrative total | £18,599.94 | Adding the 7 exact line amounts gives £18,599.94 . The PDF uses a 0% tax input and no markup solely to display this arithmetic. Decide the appropriate tax, overhead and profit treatment for an actual job; the fictional rates are not local averages or price recommendations. Scope and price boundaries Remove and replace the selected pitched roof covering on one defined roof, retaining sound supporting structure after inspection. Outside this example: No roof-framing replacement, solar array removal or concealed rot repair. The role in this brief is roofing contractor. Confirm who supplies the selected products, makes the site safe, removes waste and signs off the work. Where opening up reveals a different condition, document it and issue a revised scope and price rather than silently extending the base estimate. Also check access, drying or curing time, and the client handoff described in the work sequence. Before you send - Measure each roof plane, pitch, edges, penetrations and access; purchasing area differs from projected floor area. - Separate covering, underlay, flashings and ventilation allowances. - Document safe access, weather protection and a staged tear-off before scheduling. - Unsound decking or hidden water damage requires a revised structural repair line. Compare the written scope with every line in the pitched roof covering replacement PDF example (https://quicklyestimates.com/en-gb/samples/roof-replacement-estimate/). The preview below is the first page of the actual app export; open the PDF to inspect its full scope, notes and amounts. (https://quicklyestimates.com/assets/guides/roof-replacement/en-GB/estimate.pdf) Questions about this job Which quantity controls this pitched roof covering replacement estimate? Measure each roof plane, pitch, edges, penetrations and access; purchasing area differs from projected floor area. When should this pitched roof covering replacement quote be revised? Unsound decking or hidden water damage requires a revised structural repair line. No roof-framing replacement, solar array removal or concealed rot repair. FROM SITE NOTES TO AN ITEMISED PDF Build your own pitched roof covering replacement estimate Enter the project boundary and your measured lines in Estimates on iPhone or Android. Edit the fictional quantities and rates, add the actual business and client details, then inspect the PDF before sharing it. Create an estimate ↗ (https://quicklyestimates.com/en-gb/download/)Open the worked example → (https://quicklyestimates.com/en-gb/samples/roof-replacement-estimate/) Get the app: https://quicklyestimates.com/en-gb/download/ App Store (iPhone): https://apps.apple.com/app/id6740389403 Google Play (Android): https://play.google.com/store/apps/details?id=com.uzel.contractorplus