Owner Guide
A weak roof RFP guarantees an uncomparable bid set. When three contractors price three different scopes, you are not comparing value, you are comparing assumptions, and the lowest number usually carries the thinnest scope. We write and review roofing RFPs on behalf of owners precisely to remove that ambiguity, so that every bidder prices the same work to the same standard and the differences left on the table are the ones that actually matter. The sections below are what we insist on including.
Define the Scope Before You Define the System
The first job of the RFP is to state the work without ambiguity: which roof sections, what square footage, tear-off versus re-cover versus recover-over-one-layer, and what happens to existing insulation. A re-cover proposal and a full tear-off proposal answer different questions and cost dramatically different amounts, so the RFP must declare the approach or require each bidder to price a single specified one. If the decision between systems is still open, ask for priced alternates rather than letting each contractor choose, which makes the bids incomparable.
Name the existing conditions you already know. If a condition report or infrared scan identified wet insulation, disclose it and require a unit price for saturated-deck replacement so a known unknown does not become a change order.
Specify the System and Materials
Vague material language is where margin and risk hide. The RFP should specify the membrane system and its key parameters so a bidder cannot substitute down to win on price.
- Membrane type and thickness: 60-mil versus 80-mil TPO or PVC, EPDM gauge, modified bitumen ply count, BUR configuration, or SPF density and coating mils
- Attachment method: mechanically fastened, fully adhered, or ballasted
- Insulation type, R-value, and number of layers, with cover board specified
- Manufacturer approval and the specific warranty term and type required
- Flashing, edge metal, and detail standards, referencing manufacturer details
Tying the specification to a named manufacturer warranty does more than set quality; it ensures the installing contractor is approved by that manufacturer and that the assembly will actually qualify for the coverage you are paying for.
Require Meaningful Submittals
The submittals you require at bid time tell you whether a contractor can actually perform the work and stand behind it. We treat these as qualifying criteria, not paperwork.
- Proof of manufacturer certification for the specified system
- Sample warranty document, not just a stated term
- License, insurance limits, and bonding capacity
- References for comparable roof type, size, and occupancy
- Project schedule, crew size, and named project manager
- Safety program and any relevant experience modifier
Address Logistics and Building Operations
On occupied commercial buildings, how the work is performed is nearly as important as the roof itself. The RFP should set expectations for staging, crane and material handling locations, roof access, and protection of the interior and tenants below. For retail, medical, data, and food-service occupancies, interior exposure during tear-off is a real risk, so require night or phased work where appropriate and state who carries responsibility for temporary dry-in if weather interrupts. Spelling out working hours, parking, debris removal, and daily clean-up prevents the operational friction that turns a sound roof project into a tenant-relations problem.
Set the Commercial and Contract Terms
The terms determine who absorbs surprise. We require the RFP to fix the rules of the game before bids arrive, so the negotiation does not happen after award when you have lost leverage.
- Unit prices for wet insulation, deck repair, and other likely hidden conditions
- A defined change-order process with markup caps
- Payment schedule, retainage, and lien-waiver requirements
- Liquidated or defined remedies for schedule overrun where occupancy demands it
- Warranty start date, inspection, and close-out documentation obligations
Requiring unit prices up front is the single most effective protection against the post-award change order. When a bidder commits to a per-square-foot price for replacing saturated insulation before they know how much they will find, they cannot weaponize the discovery later.
Standardize the Bid Format
Finally, dictate how bidders respond. A required bid form, with line items for base scope, each alternate, and each unit price, forces every proposal into the same shape and makes a true side-by-side comparison possible. Without it, you receive three differently organized narratives and spend your evaluation reconstructing what each one actually means. A clean format also surfaces the outlier fast: when one number is far below the others on identical scope, that gap is now a question you can ask rather than a risk you discover during construction. A disciplined RFP does not just produce better bids; it produces a decision you can defend to ownership and a contract that holds when conditions get complicated.