The spec names a manufacturer, and the manufacturer's installation details name the price. In Coeur d'Alene, ID that matters twice over, because a 60 psf snow load and a short dry window push every system toward its limits on thickness, fastening and cold-weather application. A general contractor reading a spec should know which details are fixed by the maker and which are open to a bid alternate.
Roofing Manufacturers
GAF Commercial Roofing Systems
GAF commercial roofing in Coeur d'Alene, ID: how a spec naming GAF single-ply or modified bitumen is priced, installed to the maker's details and closed out.
Carlisle SynTec Roofing Systems
Carlisle SynTec roofing in Coeur d'Alene, ID: pricing a spec that names this maker's EPDM, TPO or PVC single-ply, with snow-load additions and closeout.
Johns Manville Roofing Systems
Johns Manville roofing in Coeur d'Alene, ID: pricing a spec that names this maker's membranes and insulation boards, with snow load and wind on separate lines.
Holcim Elevate Roofing Systems
Holcim Elevate roofing in Coeur d'Alene, ID, formerly Firestone Building Products: pricing new single-ply specs and repairing roofs under the older name.
Sika Sarnafil Roofing Systems
Sika Sarnafil roofing in Coeur d'Alene, ID: how a PVC-led single-ply spec is priced for heavy snow, with welds, details and closeout shown line by line.
Versico Roofing Systems
Versico roofing in Coeur d'Alene, ID: how a single-ply spec naming this maker gets priced for warehouse and flex roofs under a 60 psf snow load.
Soprema Roofing Systems
Soprema roofing in Coeur d'Alene, ID: how a spec for modified bitumen or liquid-applied membranes is priced for heavy snow, from valley floor to Silver Valley.
Duro-Last Roofing Systems
Duro-Last roofing in Coeur d'Alene, ID: prefabricated PVC membrane built to your roof's measurements, what it saves on site and where field conditions decide.
More About Our Roofing Manufacturers
The Call: Follow the Maker's Details
Each manufacturer publishes its own details for seams, flashing, edge metal and fastening. We install and repair systems to those details, and we match repair materials to the membrane already on the roof. Systems from GAF, Carlisle SynTec, Johns Manville and Holcim Elevate cover the single-ply and low-slope field. Sika Sarnafil, Versico, Soprema and Duro-Last fill out the list.
What It Costs: Thickness, Insulation and Fastening
Price moves with three choices the manufacturer's spec controls: membrane thickness, insulation depth and fastening pattern. On a tilt-up at Riverbend Commerce Park, the edge and corner fastening rows carry most of the wind uplift, and a thicker sheet costs more in material but can reduce patching later. Insulation depth drives the parapet height, which in turn drives flashing cost. We show each as a line item, so a general contractor can compare the named system against an equal without guessing what changed. Cover board, tapered insulation and extra drain sumps sit beside them as alternates, because each one changes how the roof handles a heavy melt.
Where It Fails First: Cold-Weather Installs
Adhesives, sealants and welded seams have temperature limits, and North Idaho winters cross them early. Post Falls sees about 59 inches of snow a year and records have touched minus 30 F, so a spec that assumes shoulder-season weather can stall. We plan the install window around the maker's limits rather than around the calendar. A seam welded or glued below its application range can look closed on the day and open by the first thaw, and nobody sees it until a tenant calls. When the forecast leaves a gap, we hold the sheet, dry-in what is exposed and finish when the temperature allows. That hold point goes in the schedule so the owner knows it exists before the work begins.
Closeout: Matching an Existing Roof
When you already have a manufacturer's membrane on the roof, send the spec or the last repair record. We match the repair to the existing system so the two behave as one, and we note anything the original details left open.
Commercial Roofing Questions
Can you repair a roof from a different maker?
Yes. We match repair materials to the existing membrane type and use the details published for that system.
Does the spec lock out alternates?
Not always. Many specs name an equal, and we price the named system and the equal on separate lines.
Does a thicker membrane last longer in snow?
It resists punctures from ice and foot traffic better. Seam quality and drain care still decide how the roof ages.
Who handles manufacturer paperwork?
We prepare the install records and photographs the spec calls for, and the owner keeps the originals.
Send the Spec Section
Send the roofing spec section and the snow-load sheet. We will return a priced scope with the named system and any equals broken out, so the owner decides what stays in.