Johns Manville Roofing Systems in Appleton, WI
Johns Manville Built-Up, Modified Bitumen, and Single-Ply Systems
Johns Manville carries one of the widest product ranges of any manufacturer we spec against, covering built-up roofing, modified bitumen, TPO, PVC, EPDM, and the insulation and cover board products that go under all of them. That range comes out of the company's manufacturing background in glass fiber and insulation products, which shows up in how deep its insulation and cover board catalog goes compared to some single-ply-focused manufacturers.
Built-Up and Modified Bitumen Depth
Built-up roofing and SBS modified bitumen systems, sold under JM's DynaWeld and DynaKap product names, remain a real option on the Fox Valley's older multi-ply roof stock, including buildings around the paper mill sites in Kaukauna and Combined Locks where a multi-decade-old asphalt roof needs recovering or partial replacement rather than a full conversion to single-ply. JM's published assemblies for these systems cover both smooth and granulated cap sheet options, torch-applied and self-adhered installation methods, giving us more flexibility on a re-cover than a manufacturer with only one modified bitumen application method.
TPO and PVC Single-Ply Lines
JM's TPO membrane covers the standard gauge range with hot-air welded seams and published wind uplift and fastening data across deck and insulation configurations, similar to any major TPO manufacturer. The PVC line matters more specifically on roofs with grease or chemical exposure, which comes up on food processing buildings around Little Chute and New London, since PVC's chemical resistance profile holds up better than TPO against fryer exhaust and cleaning chemical runoff over the membrane's service life.
Having TPO and PVC under the same manufacturer's documentation set simplifies comparing the two chemistries side by side for a building where we're not sure yet which fits better, since fastening patterns and wind uplift testing methodology stay consistent between the two product lines.
Fesco Board and Insulation Manufacturing
JM's insulation catalog includes polyisocyanurate board along with Fesco Board, a fiberboard cover board product with a long track record as a substrate under both built-up and single-ply membranes. That manufacturing depth in insulation and cover board, rather than membrane alone, is a direct result of the company's historical business in fiberglass and mineral wool insulation products.
On tapered insulation systems, where we're building slope to drains across a large industrial roof deck, having polyiso and cover board specified from a manufacturer whose core business includes insulation manufacturing gives us a more complete published assembly than pairing membrane from one company with insulation sourced separately.
That combined insulation-and-cover-board approach comes up often on the older manufacturing buildings around Oshkosh's industrial corridor, where a deck built for a heavier built-up roof decades ago now needs a tapered insulation retrofit to correct standing water before any new membrane goes down.
Fastening Patterns and Wind Uplift Testing
Wind uplift design pressure has to be checked against a specific tested assembly, and JM publishes fastening data across deck types, insulation thicknesses, and roof zones for each of its membrane systems. On larger industrial footprints around Grand Chute's retail corridor and the distribution buildings near Greenville, where exposure category and building height push wind uplift requirements higher than a small retail box, we reference that published fastening data directly rather than assuming a standard spacing carries over from a smaller project.
The same published data covers perimeter and corner zone fastening, which typically needs a tighter spacing than the field of the roof regardless of membrane type, and getting that zone geometry right is as much a part of the wind uplift spec as the fastener count itself.
What We Look At With Johns Manville Systems
- Full range spanning built-up, modified bitumen, TPO, PVC, and EPDM under one manufacturer
- Torch-applied and self-adhered modified bitumen options for older asphalt roof stock
- PVC line with strong chemical resistance for food processing and grease-exposed roofs
- Deep insulation and cover board catalog, including Fesco Board, from the company's fiberglass manufacturing heritage
- Published wind uplift and fastening data across each membrane system
Where JM Fits Our Manufacturer Comparison
We compare JM's product lines against a roof's actual deck condition, drainage, insulation needs, and wind exposure the same way we compare any manufacturer, rather than defaulting to one brand across every project. The breadth of JM's catalog, spanning both asphalt-based and single-ply systems, tends to matter most on mixed-portfolio projects or buildings with an existing built-up roof that a re-cover needs to match.
We do not represent a specific certification tier, exclusive dealer status, or formal partnership with Johns Manville. Product selection is based on matching published assembly specifications to the roof's actual conditions.
Questions Fox Valley Owners Ask About Johns Manville Roofing
What roofing systems does Johns Manville manufacture?
JM manufactures built-up roofing, SBS modified bitumen, TPO, PVC, and EPDM membranes, along with polyiso insulation and Fesco Board cover board products.
Is JM PVC a good fit for a food processing building?
PVC's chemical and grease resistance profile generally holds up better than TPO on roofs exposed to fryer exhaust or cleaning chemical runoff, which makes it worth considering for that building type.
Can JM handle a re-cover over an existing built-up roof?
Yes. JM's modified bitumen and built-up product lines are published for both new construction and re-cover applications over existing asphalt-based roofs.
What is Fesco Board?
Fesco Board is a fiberboard cover board product manufactured by JM, commonly specified as a substrate layer under both built-up and single-ply membranes.
Does JM publish wind uplift data for Wisconsin exposure categories?
Yes. JM publishes fastening and wind uplift assembly data across a range of deck types and exposure categories that we reference when engineering a roof's fastening pattern.