Overview
Flat roof work is sold for the membrane, and the upstand detail at the edge is the line that decides longevity
Flat roof specialists work on the part of the roofing trade that isn't pitched. Extensions, garage roofs, dormer flats, balconies, commercial roof areas, and the increasingly common single-storey extension where the customer wants a usable terrace or just a clean line at the back. The system options are EPDM rubber, GRP fibreglass, single-ply membrane (TPO, PVC, EPDM), built-up felt, hot-melt asphalt, and liquid-applied coatings. Each has a different lifespan, a different install method, and a different price. The detail that decides longevity isn't the field; it's the upstand at the edge, the parapet, the flashings, and the corner detail where two membranes meet. A flat 'flat roof, $4,800' quote without naming the system and the detail spec misses the actual durability conversation.
QuoteGenio gives flat roof specialists a quoting shape that surfaces system and detail. Survey and design as the first line, deck preparation, insulation by thickness with the U-value named, vapour control layer, membrane or coating by brand and grade with the manufacturer warranty, upstand and parapet detail with the corner reinforcement, flashings to chimney or wall abutment, drainage outlets, and edge trim. Send via WhatsApp from the roof, take a deposit on the materials order, raise progress invoices through deck and membrane phases, and the final invoice attaches the manufacturer warranty document the customer keeps for the property file.
Who it is for
Who uses QuoteGenio
Built for every type of flat roofing business.
The problem
The quoting headaches every flat roof specialist knows
Flat roofing is a warranty business. Get the detail wrong on the quote and you eat the callback for the next ten years.
System specification changes price 2x
TPO, EPDM, torch-on, or liquid all cost differently. Quote the wrong system on the wrong deck and your margin vanishes.
Upstand and detail work is easy to miss
Parapets, penetrations, drains, and gutters all need membrane upstand. Miss a detail and you are back to reseal for free.
Verbal scope on large commercial jobs
Facilities managers say 'just sort the leak'. Two weeks later they want the full roof replaced but at the original price.
The fix
QuoteGenio makes it simple
Quotes that spell out system, deck, primer, insulation, and warranty, so the scope is watertight before you start.
The payoff
What you get with QuoteGenio
The everyday wins that add up across a year of quoting and invoicing.
Built for flat roof systems
Line items for substrate prep, primer, vapour barrier, insulation, membrane, upstand, and drain detail. Every system component priced separately.
Quote from the rooftop
Pace the roof, key in dimensions, specify the system, send the quote before you are back on the ground.
Warranty written in
Save your standard warranty terms once. They attach to every quote and invoice so the client always knows what is covered.
Track commercial invoices
Commercial flat roof work comes with 30-60 day payment terms. Track what is outstanding and follow up cleanly.
Built for your trade
Quoting calibrated to how flat roof specialists actually work
Pick your trade in Settings and the entire quote flow switches to fit. Line item presets, compliance fields, on-the-quote calculators, and per-m² / after-hours pricing all change to match your industry.
Trade-specific line items
Quick add picker pre-fills the common items your trade quotes. Skip the blank rows.
Brand-specific catalogues
Pylontech, Hikvision, Canadian Solar, Sunsynk and others pre-named. Pick the brand, the description writes itself.
Compliance fields built in
IOPSA, ECASA, PIRB, PSIRA, NHBRC, SAQCC. Set once. Every quote prints them under FROM.
Registration expiry alerts
Dashboard notification 60 days before your PSIRA, CoC or any dated registration lapses.
Per-m² / hour / day billing
Unit selector on every line item: m², hr, linear m, days. Stop doing the maths externally.
After-hours and emergency
1.5× and 2× multipliers as a one-tap toggle. Customer sees the breakdown on the quote.
Quote-flow calculators
Solar size, battery backup, cable run cost. Compute on the spot, drop straight onto the quote.
Staged payments
Deposit on acceptance + balance on completion as two separate amounts on the quote PDF.
Scope-of-work checklist
Structured Included / Not included lists. Client acceptance = signing the scope.
Site-survey mode
Log a location per line item: camera positions, fixtures by room, sensors by zone.
Regional rate hints
Pricing ranges per item per currency shown as you quote.
Free on every plan
All of the above included on the free plan. Premium is for capacity, not the trade tooling.
Why QuoteGenio
Why Flat Roof Specialists choose QuoteGenio
The tools that matter most when you are quoting on-site, under pressure, and between jobs.
Quote from your phone
Most Flat Roof Specialists build and send quotes directly from the job site. No laptop, no office, no delays.
Win more jobs, faster
The first professional quote a client receives usually wins. Respond in minutes, not hours.
Quote to invoice in one click
When the job is accepted, convert to an invoice instantly. No retyping, no double entry.
Pricing guide
Typical Flat Roof Specialists job pricing
Guideline pricing for common flat roof jobs. Rates shift with system, deck type, height, access, and whether scaffold or hoist is needed. Treat as sanity checks, not fixed rates.
| Job | Typical range |
|---|---|
| TPO single-ply membrane (per sq m) | $ 65 - $ 135 / sq m |
| EPDM rubber membrane (per sq m) | $ 52 - $ 98 / sq m |
| Torch-on 4mm SBS (per sq m) | $ 48 - $ 88 / sq m |
| Liquid applied polyurethane (per sq m) | $ 72 - $ 140 / sq m |
| Insulation board 80mm PIR (per sq m) | $ 35 - $ 58 / sq m |
| Upstand flashing (per m) | $ 38 - $ 72 / m |
| Gutter outlet and sump detail | $ 180 - $ 420 ea |
Pricing shown in USD as a rough benchmark. Rates vary significantly by country, region, currency, and market.
Call-out fees
Flat roof surveys on commercial buildings take half a day and often involve lifting samples. Charge $ 380 to $ 850 for a full survey with written report, credited against the contract. Free surveys on commercial buildings are a race to the bottom.
Hourly vs fixed pricing
Use fixed per sq m pricing on straightforward flat roof replacements with known systems. Use hourly ($ 95 to $ 160 per hour per crew) for leak repairs, investigation work, and anything where the decking condition is unknown. Always quote decking replacement as a provisional sum on re-roofs.
See it in action
Example quote breakdown
A clean flat roof quote shows the client every layer of the system. Strip, prep, insulation, membrane, detailing, access, and site work. Clients who see the build-up trust the price.
Try it yourself
Job size
Region
Sample quote
TPO flat roof replacement, 120 sq m commercial roof with 3 drain outlets
Strip existing membrane and insulation
Check and repair timber deck
Vapour barrier
80mm PIR insulation board mechanically fixed
TPO membrane 1.5mm fully adhered
Upstand flashing (parapets, 38m)
Drain outlet detail (3 drains)
Crane hire and access
Site clean and rubble removal
| Description | Qty | Rate | Total |
|---|---|---|---|
| Strip existing membrane and insulation | 120 | $ 14.00 / sq m | $ 1,680 |
| Check and repair timber deck | 1 | $ 450 | $ 450 |
| Vapour barrier | 120 | $ 8.00 / sq m | $ 960 |
| 80mm PIR insulation board mechanically fixed | 120 | $ 42.00 / sq m | $ 5,040 |
| TPO membrane 1.5mm fully adhered | 120 | $ 85.00 / sq m | $ 10,200 |
| Upstand flashing (parapets, 38m) | 38 | $ 52.00 / m | $ 1,976 |
| Drain outlet detail (3 drains) | 3 | $ 280 ea | $ 840 |
| Crane hire and access | 1 | $ 1,200 | $ 1,200 |
| Site clean and rubble removal | 1 | $ 380 | $ 380 |
| Subtotal | $ 22,726 | ||
| Tax (10%) | $ 2,273 | ||
| Total incl. tax | $ 24,999 | ||
Totals recalculate as you change the controls above. Tax rate inferred from the sample quote.
Items often forgotten
Decking repair as a provisional sum, vapour barrier under insulation, parapet cappings, skirting height adjustments, rainwater outlets, edge trims, and a 10 or 15 year product warranty line. Commercial clients specifically ask for warranty terms upfront.
Peer snapshot
How Flat Roof Specialists actually use QuoteGenio
Indicative activity for Flat Roof Specialists on the platform. Use it as a benchmark for how often to quote and how fast to respond.
31
Quotes sent per month
55%
Average quote acceptance
3 min
Median time to send quote
$ 24,999
Typical quote value
Figures are indicative platform averages for this trade segment.
Start quoting Flat Roof Specialist jobs like this, free
Build your first quote in under 2 minutes. No credit card, no setup fee, no contract.
Avoid these
Common quoting mistakes
Flat roof specialists tell us the same mistakes show up on quotes across every trade in the field. Fix these and warranty claims drop, margins hold, and client trust builds.
Mistake: Quoting membrane only without the full build-up
Better: The membrane is 40 percent of a flat roof cost. Vapour barrier, insulation, fixings, and detailing make up the rest. List each layer so the client sees a real specification.
Mistake: Not specifying decking condition
Better: Always quote decking replacement as a provisional sum of 5 to 15 percent of the roof area. When you strip the old membrane you often find rot or delamination. Clients accept a planned allowance, they fight over a surprise.
Mistake: Forgetting fall and drainage
Better: A flat roof with no fall collects water and warranty claims. Quote fall-correction (tapered insulation) as a separate line when the existing fall is insufficient. Photograph standing water on the old roof as justification.
Mistake: Upstand height too short on quote
Better: Membrane upstand against parapets should be at least 150mm, ideally 300mm. Some manufacturers void warranty under 150mm. Quote upstand by running metre at full height, not skimped.
Mistake: No warranty difference between systems
Better: TPO and EPDM carry manufacturer warranties of 15 to 25 years if installed correctly. Torch-on is typically 10 to 15. Quote shows both warranty terms so the client sees why premium systems cost more.
Mistake: Ignoring access cost
Better: Tall commercial buildings need hoists, cranes, or scissor lifts. Quote access as its own line, specify safe work at height requirements, and include any working-at-height training or supervision fees.
Mistake: No payment schedule on commercial jobs
Better: Commercial flat roof work over $ 10k should be staged: 30% on acceptance (to order materials), 40% at membrane laid, 30% on completion. Without staging you fund the client's project.
Mistake: No follow-up after sending the quote
Better: Most quotes that don't close, don't close because nobody followed up. Send a polite check-in 48 hours after the quote lands, and a second nudge at day 7. Two of every three accepted quotes get there because someone followed up.
Step by step
How to quote flat roof jobs
Get onto the roof and assess the full build-up before you price. Measure the area in square metres, count every penetration (rooflights, extractor fans, soil vent pipes, cable entries), and check the upstand height against every parapet and wall abutment. Decide whether the client needs TPO, EPDM, torch-on, or liquid-applied based on the deck type, number of details, and budget. Lift a sample or probe the existing membrane to assess decking condition, photograph any standing water as evidence that fall-correction is needed, and note access requirements (hoist, crane, scissor lift). Commercial surveys are a half-day job with sample lifting; charge $ 380 to $ 850 for this, refundable against the contract.
Itemise the full system build-up. Strip and dispose on one line, decking repair as a provisional sum of 5 to 15 percent, then vapour barrier, insulation (PIR 80mm or tapered for fall-correction), membrane (with product code and thickness like TPO 1.5mm fully adhered), upstand flashing by running metre at 150mm minimum height, and each penetration detail at $ 180 to $ 420. Quote parapet cappings, edge trims, and gutter outlets separately. State the warranty on each line: TPO and EPDM carry 15 to 25 years manufacturer cover, torch-on is typically 10 to 15 years. Access (crane hire, MEWP rental, scaffold) always gets its own line with the specific equipment listed.
Commercial flat roof quotes should carry a 30 day validity because membrane pricing, PIR insulation, and petrochemical-based torch-on products swing with oil and exchange rates. Stage commercial payments over $ 10k: 30 percent on acceptance to order materials, 40 percent at membrane laid, 30 percent on completion and successful water test. State the product warranty clearly and attach the manufacturer system guarantee document. Include a weather clause because membrane cannot be applied below 5 degrees C or in rain, and note that overnight temporary cover will be provided during the works. Any decking replacement beyond the provisional allowance is quoted before work continues.
Commercial clients tender to multiple contractors and facilities managers want email with a proper PDF and a written specification. Send the quote by end of business the day of your survey, because facilities managers approve on the first complete document that addresses their question rather than the cheapest. Follow up after one week with a call to confirm the FM has reviewed it and to offer a sample board or mockup if needed. Variation orders during the job (additional upstand, extra drains, parapet rebuilds) must be quoted and emailed for approval before execution, because unsigned variations do not get paid on retention-held commercial work.
FAQ
Common questions from flat roof specialists
Everything you need to know before getting started.
Yes. Use QuoteGenio to quote multiple systems as options or alternatives. Or create separate quotes for each option and let the client choose based on the PDF.
Yes. Save your standard warranty language in the terms section. It attaches to every quote and invoice automatically.
Yes. Line items are flexible. Most flat roof specialists break out substrate prep, vapour barrier, insulation, membrane, and detailing as separate lines.
Yes. Every quote has a shareable link. Email, WhatsApp, or copy the URL. Commercial clients usually prefer email with the PDF attached.
Liquid systems are typically 20-40% more per square metre installed but are better for complex detailing, roofs with lots of penetrations, and refurb work. Quote them separately with the application method stated. Clients with flat roofs that have many skylights, pipes, or vents usually benefit from liquid.
A warm roof has insulation above the deck; a cold roof has insulation below. Quote them differently because the build-up, vapour barrier placement, and condensation risk are completely different. Most UK and EU jurisdictions now require warm roofs for new work; state which you are quoting.
Tapered insulation is priced by area with a separate allowance for the tapered cutting. Typically 20-35% more than flat insulation of the same thickness. Quote the average thickness and note that a tapered layout drawing is included as part of the manufacturer's design service, usually free.
Every penetration needs a dedicated detail line item (typically $ 180 to $ 420 per penetration depending on size). Count them from the roof plan, not after the strip-out. Bundling them into a general 'detail work' line almost always underestimates.
Link to a hosted PDF from the notes field. Many specialists keep a folder of manufacturer data sheets and paste links into quotes.
Yes. Every quote has a public link with an Accept button. The client opens the link on any device and taps Accept. You get a notification and can convert to invoice.
Still have questions? We would rather answer them now than after you have signed up.
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Guides
Guides for Flat Roof Specialists
Practical advice to help you quote better, get paid faster, and grow your business.
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