Roofing Quote Mastery: How to Price Repairs, Replacements, and Restorations

Roofing quotes require precision. Underquote and you're working at height for nothing. Overquote and you lose the job.

Here's how to quote roofing work accurately every time.

Roof Measurement and Assessment

Measuring Roof Area

Ground-Level Estimation

• Measure building footprint
• Multiply by pitch factor
• Add for overhangs

Pitch Factors

• Flat (0-2°): 1.00
• Low pitch (15°): 1.04
• Medium pitch (30°): 1.15
• Steep pitch (45°): 1.41
• Very steep (60°): 2.00

Example Calculation

• Building footprint: 10m × 8m = 80m²
• Pitch: 30° (factor 1.15)
• Roof area: 80 × 1.15 = 92m²
• Add overhangs: 92 + 10% = 101m²

Satellite Measurement Tools

• Google Earth Pro (free)
• EagleView (paid, accurate)
• Hover (paid, 3D models)

On-Site Assessment Checklist

Roof Condition

• [ ] Existing material type and condition
• [ ] Visible damage or wear
• [ ] Previous repairs
• [ ] Moss/lichen growth
• [ ] Flashing condition
• [ ] Gutter condition

Access and Safety

• [ ] Roof height
• [ ] Access points
• [ ] Scaffolding requirements
• [ ] Edge protection needs
• [ ] Fragile roof areas
• [ ] Overhead hazards

Structural

• [ ] Sagging or movement
• [ ] Timber condition (if visible)
• [ ] Ventilation adequacy
• [ ] Insulation presence

Repair Quoting

Common Repair Types

Tile/Slate Replacement

• Individual tiles: £15-30 each (installed)
• Ridge tiles: £25-50 each (installed)
• Hip tiles: £30-60 each (installed)
• Minimum callout: £150-250

Flashing Repairs

• Lead flashing repair: £150-400
• Lead flashing replacement: £300-800
• Chimney flashing: £400-1,200
• Valley repair: £200-500

Flat Roof Repairs

• Patch repair: £150-400
• Blister repair: £100-250
• Seam repair: £150-350

Gutter Repairs

• Joint sealing: £50-100
• Section replacement: £80-200
• Downpipe replacement: £100-250

Repair Quote Structure

**Roof Repair Quote**

>

**Works Required:**

- Replace 12 broken concrete tiles

- Re-bed 3 ridge tiles

- Repair lead flashing at chimney

>

**Labour:** £450

**Materials:** £180

**Access (tower scaffold):** £150

**Waste disposal:** £50

>

**Total (excl VAT): £830**

Replacement Quoting

Roof Replacement Components

Strip and Dispose

• Tiles/slates: £15-25/m²
• Felt and battens: Included
• Skip hire: £250-400
• Disposal fees: £100-200/tonne

Timber Repairs (Allowance)

• Minor repairs: 5% of roof area
• Moderate repairs: 10-15%
• Major repairs: Quote separately after strip

Underlay and Battens

• Breathable membrane: £3-5/m²
• Counter battens: £2-4/m²
• Tile battens: £3-5/m²
• Labour: £8-15/m²

Roof Covering

• Concrete tiles: £25-40/m² (supply and fix)
• Clay tiles: £40-70/m² (supply and fix)
• Natural slate: £80-150/m² (supply and fix)
• Artificial slate: £50-80/m² (supply and fix)

Flashings and Finishing

• Lead flashings: £80-150/linear metre
• Ridge tiles: £40-70/linear metre
• Hip tiles: £50-80/linear metre
• Dry ridge system: £50-80/linear metre
• Ventilation: £30-60 each

Replacement Quote Example

Semi-Detached House — Full Reroof

Roof Area: 85m²

Strip and Dispose

• Remove existing tiles and felt: £1,700
• Skip and disposal: £450
• **Subtotal: £2,150**

Timber Repairs (Allowance)

• 10% allowance: £600

New Roof

• Breathable membrane: £340
• Battens: £510
• Concrete tiles (Marley Modern): £2,975
• Ridge tiles (dry system): £420
• Lead flashings: £680
• Ventilation tiles (4): £200
• **Subtotal: £5,125**

Scaffolding

• Full scaffold: £1,200

Total (excl VAT): £9,075

VAT (20%): £1,815

Total (incl VAT): £10,890

Restoration Quoting

Roof Restoration Process

1. **Cleaning** — Pressure wash, biocide treatment
2. **Repairs** — Replace broken tiles, re-bed ridges
3. **Sealing** — Apply roof coating
4. **Finishing** — Paint flashings, clean gutters

Restoration Pricing

Cleaning

• Pressure washing: £8-15/m²
• Biocide treatment: £3-6/m²
• Moss removal: £5-10/m²

Coating

• Primer: £3-5/m²
• Roof coating (2 coats): £15-25/m²
• Total coating: £18-30/m²

Complete Restoration

• Budget (clean + basic coat): £35-50/m²
• Standard (clean + quality coat): £50-70/m²
• Premium (full restoration): £70-100/m²

Safety and Access Costs

Scaffolding

Scaffold Hire Rates

• Basic scaffold (per week): £150-300
• Full house scaffold: £800-1,500
• Chimney scaffold: £300-600
• Tower scaffold (daily): £50-100

Edge Protection

Roof Edge Protection

• Supply and install: £15-25/linear metre
• Hire (per week): £100-200

Safety Equipment

Include in Overheads

• Harnesses and lanyards
• Roof ladders
• Warning signs
• First aid equipment

Weather Contingency

Quote Clauses

"This quote is based on normal working conditions. Delays due to adverse weather (rain, high winds, frost) may extend the project timeline. No additional charges will apply for weather delays unless materials require re-ordering."

Seasonal Considerations

• Spring/Summer: Standard pricing
• Autumn: Add 5-10% contingency
• Winter: Add 10-20% contingency or decline

Using QuoteOS for Roofing Quotes

1. **Enter roof dimensions** — Or use satellite measurement
2. **Select work type** — Repair, replace, restore
3. **AI calculates materials** — With waste factors
4. **Add access costs** — Scaffolding, safety
5. **Generate professional quote** — With terms

Try QuoteOS free → [Roofer Quoting Software](/trades/roofers)