Commercial Roofing Quotes — Compared Properly, From a Survey
Holding two or three commercial roofing quotes that do not add up? The cheapest number is very often the one that hides the fault. We survey the roof — the deck, the falls and the loads — then set out repair, refurbishment and replacement options side by side, so you compare like with like and defend the spend to the board.
- NFRC network
- Manufacturer-approved
- Survey-based
- CDM & Work at Height
- Form-only, no sales calls
- NFRC-accredited, manufacturer-approved installers
- Every option priced from a survey, not a rate card
- Repair, refurbish and replace numbers, side by side
- Work at Height and CDM handled for a live, occupied building
WE CONNECT YOU WITH INSTALLERS ACCREDITED BY
Why two quotes for the same roof differ by 40% — and how to read them
A facilities manager rarely struggles to find a roofer. The struggle is the pile of quotes on the desk — three numbers for the “same” roof, thousands apart, with no honest way to tell which is comparing like with like. The gap is almost never the price of the work. It is the scope. One firm strips a wet deck and rebuilds a warm deck to a Part L U-value under a 25-year single-point manufacturer guarantee; another overlays the existing roof, leaves the condensation problem in place, and offers a workmanship promise. The headline numbers look comparable and the work behind them is not.
A commercial roof is read from the deck up, not chosen from a price list, and a quote is only comparable once the specification is fixed. Before any rate per square metre means anything, five things have to be on the page:
- The system, and why. Single-ply, built-up felt, liquid, profiled-metal cladding, slate, tile, an overlay or a coating — each is right in a specific set of conditions set by the deck, the falls and the loads, not by a brand or a headline price.
- The falls and drainage design. On a flat roof, BS 6229:2025 sets a minimum finished fall of 1:80; a roof that ponds was never laid to fall, and ponding voids guarantees. A quote that is silent on falls is silent on whether the roof will drain.
- The build-up and the U-value. Renewing a significant area triggers a Part L thermal-element upgrade, typically to around 0.18 W/m²K on a re-roof. An overlay that skips it may not be lawful, and will not perform.
- The guarantee — type and term. A single-point or insurer-backed manufacturer guarantee is a different thing from a workmanship promise. Ask for the number of years and whether the cover survives any one firm ceasing to trade. Never accept a “lifetime guarantee”; a guarantee is always bounded by a term.
- What it excludes. Access and edge protection for working over a live building, asbestos survey on pre-2000 stock, gutter and rooflight work — the cheap quote is often cheap because these sit in the exclusions.
Give us the roof and we will connect you with an NFRC-accredited, manufacturer-approved installer who surveys first and sets out every option against that checklist — so the numbers on your desk finally mean the same thing.
What a commercial roof costs by system, and why whole-life beats a headline price
Roofs are priced from a survey, not a rule of thumb: roof area drives the programme and the rate per square metre, while the deck, the falls, the loads and the building's use drive the specification — and therefore the price. The table below gives indicative supplied-and-fitted ranges across every commercial roof system, from a life-extending coating to a full re-clad, with typical service life and guarantee. All indicative, all confirmed from a survey.
The honest framing for the board is whole-life cost, not the capital line on its own. A life-expired roof patched reactively typically costs more over a ten-year horizon than a planned re-roof or re-clad carrying a manufacturer guarantee measured in decades — before you count the business-interruption cost of a single major ingress: ruined stock, a closed aisle, a lost trading or teaching day. Where budget timing is the constraint, the works can be phased across financial years by roof area. Work through the numbers on our cost guide, or the repair, refurbish or replace decision.
| Roof system | Guide cost | Typical service life | Guarantee |
|---|---|---|---|
| Industrial cladding / re-clad | £70–£140 | 30–40 yr | 25–40 yr |
| Commercial flat roof | £90–£180 | 25–35 yr | 20–30 yr |
| Pitched slate / tile / metal | £90–£220 | 40–60 yr | 15–30 yr |
| Refurbishment / over-roofing | £45–£110 | +20–30 yr | 15–25 yr |
| Roof coatings / cut-edge | £20–£55 | +15–20 yr | 10–20 yr |
| Gutter lining (per linear m) | £40–£120 | 20–25 yr | 15–25 yr |
Indicative supplied-and-fitted ranges, confirmed from a survey. Gutter lining is priced per linear metre.
Three quotes on a 2,400 m² warehouse — from £48k to £310k for the same roof
A facilities manager held three quotes for a leaking profiled-metal warehouse roof that ranged from a £48,000 coating to a £310,000 full re-clad. The three numbers looked like a bidding war; they were three different scopes. On survey the sheets were sound, but the valley gutters and the cut edges had failed — the real source of the leak was never the roof surface. The honest answer sat between the extremes: a gutter lining, cut-edge corrosion treatment and an over-sheet to a new insulated build-up at around £140,000, correcting the actual fault and adding a Part L U-value upgrade the coating would never have delivered. It ran about six weeks, phased and occupied throughout, under a 25-year manufacturer guarantee. The cheapest quote hid the fault; the dearest over-specified; only the survey made the three comparable. This is a representative, modelled scenario — figures are indicative, not a named client.
From survey to a quote you can defend to the board
A controlled process that starts with the survey and ends with a defensible quote — most roofs stay fully operational below while the work happens above.
- 01Day one
Tell us the roof
Send the building type, the roof size and what the roof is doing now — leaking, ponding, corroding, life-expired, or a planned re-roof ahead of solar. No site visit is needed for an initial view, and we respond within one working day.
- 02Week 1
Survey & core samples
We connect you with a surveyor who confirms the deck type, takes core samples to check for wet insulation, checks the gutters and cut edges, and — on any building from before 2000 — arranges an asbestos survey before any intrusive work. You get a condition report, not a sales pitch.
- 03Weeks 1–2
Options priced side by side
You receive repair, refurbishment and replacement options against a common checklist — system, falls, U-value, guarantee type and term, access plan and exclusions — so you can finally compare quotes like with like and put an honest whole-life case to the board.
- 04On site
Install, phased around you
The chosen system is fitted by a manufacturer-approved installer to the wind-uplift fixing pattern, phased bay by bay with edge protection and fragile-roof precautions so the building keeps trading below.
- 05Completion
Test, guarantee & handover
The roof is checked, drainage proven, and — where your installer is CompetentRoofer-registered — the work is self-certified with a Building Regulations Compliance Certificate. You receive the guarantee documentation, the falls and uplift design, and an O&M manual.
Building Regulations, guarantees and the honest funding position
A commercial re-roof or re-clad is notifiable building work when more than 50% of the roof surface is renewed, or more than 25% of the whole building envelope is renovated — which catches most full jobs. That triggers a Part L thermal-element upgrade, so the insulation is brought up to current standards, typically around 0.18 W/m²K on a re-roof, with compliance by calculation rather than one fixed number. Where your installer is CompetentRoofer-registered, that contractor can self-certify the work and issue a Building Regulations Compliance Certificate — the document you will need at a sale, lease event or insurance review — instead of a separate Local Authority Building Control application. Fire performance matters too: coverings are specified to the right external fire rating (Broof(t4) to BS EN 13501-5 near a boundary) under Part B, and working at height over a live building is managed under the Work at Height Regulations 2005 and CDM 2015, on which the building owner carries the Client duties.
On funding, be clear-eyed. Commercial roofing is overwhelmingly capital works and planned maintenance — there is no general public grant that re-roofs a commercial building, and any site advertising a “roofing grant” should be treated with suspicion. The legitimate angles are tax treatment: standard-rated 20% VAT recoverable by a VAT-registered business, and capital allowances on the insulation element of a warm-deck or insulated-panel upgrade — all matters for your accountant, never a blanket promise from us. See the full picture in our funding notes.
Authority references: Approved Document L, NFRC and CompetentRoofer.
Compliance is designed into the quote, not bolted on
What building owners ask before comparing quotes
The questions facilities, estates and property managers actually ask before a repair, refurbishment or re-roof.
Why do commercial roofing quotes vary so much for the same roof?
Because they are rarely quoting the same scope. One firm strips a wet deck and rebuilds a warm deck to a Part L U-value with a 25-year single-point manufacturer guarantee; another overlays the existing roof, leaves the condensation problem in place, and offers a workmanship promise. The headline numbers look comparable and the work behind them is not. Ask every quote for the system, the build-up, the falls design, the guarantee type and term, and what it excludes, then you are comparing like with like. More on our cost guide.
What does a commercial roof cost per square metre?
As an indicative guide, supplied and fitted: industrial re-cladding around £70 to £140/m², commercial flat-roof re-roofs around £90 to £180/m², pitched re-roofs around £90 to £220/m², overlay and over-roofing around £45 to £110/m², and life-extending coatings around £20 to £55/m². Gutter lining is priced per linear metre. The real driver is the build-up the deck, falls and loads demand, not the headline material — so a defensible number comes from a survey, not a rule of thumb.
Should I repair, refurbish or replace my commercial roof?
Repair where the failure is localised and the deck, insulation and falls are sound. Refurbish — overlay, over-clad or coat — where the substrate is sound and dry but the covering is tired, and you want to defer capital cost honestly. Replace where the insulation is wet, the roof ponds because it was never laid to fall, the deck is failing, or reactive patching has become an annual cost that never fixes the fault. The honest test is whole-life cost, and a survey gives you all three numbers. Work through it on our repair-or-replace guide.
Can my commercial roof carry solar panels?
Often yes, but only after a survey confirms the roof can take the load and has enough life left to justify it. A ballasted or fixed array adds roughly 15 to 25 kg/m² of dead load in typical conditions — more, up to around 30 kg/m², on exposed or high-wind roofs — plus wind uplift, and it sits on the roof for 25 years or more. Putting an array on a tired roof means lifting it again to re-roof underneath within a few years, so where solar is planned the right sequence is to survey and, if needed, re-roof first.
Is there a grant for commercial roofing?
In the general case, no. Commercial roofing is capital works and planned maintenance, and there is no public grant scheme that pays to re-roof a commercial building. Any site advertising a "roofing grant" should be treated with caution. The legitimate financial angles are tax treatment, 20% VAT that a VAT-registered business recovers, and capital allowances on the insulation element of a warm-deck or insulated-panel upgrade — all matters for your accountant. See our funding notes.
Commercial roofing quotes across the UK
Local knowledge of the ageing industrial-estate and civic building stock in each area. Pick a location for local detail, or see every area we cover.
London
Greater London. 8,908,081 population. Industrial-estate, retail and civic roof stock.
Birmingham
West Midlands. 1,141,816 population. Industrial-estate, retail and civic roof stock.
Leeds
West Yorkshire. 793,139 population. Industrial-estate, retail and civic roof stock.
Sheffield
South Yorkshire. 584,853 population. Industrial-estate, retail and civic roof stock.
Manchester
Greater Manchester. 568,996 population. Industrial-estate, retail and civic roof stock.
Bradford
West Yorkshire. 546,412 population. Industrial-estate, retail and civic roof stock.
Tell us the roof and we will get you comparable quotes
The building type, the roof size and what the roof is doing now is enough for an initial view. No site visit needed, and we respond within one working day.
Get a free commercial roofing quotes quote
Responds within one working day
- 1. Free condition review from your roof plans and photos, no obligation.
- 2. Site survey and a fixed-price, itemised proposal in writing.
- 3. Install and aftercare by accredited commercial roofing contractors.
- NFRC network
- CompetentRoofer
- SPRA / LRWA
- Insured