Polyglass Review for Wildfire-Resistant Fire-Rated Roofing

The research in brief

Polyglass is a good fit for Wildfire-Resistant Fire-Rated Roofing only when the buyer understands it is a materials manufacturer, not an installing roofing contractor. Four of seven platforms named Polyglass during the ranking stage, with an average listed rank of 6.0 and a best rank of 5. Its strongest asset is documented Class A and CAL FIRE Building Materials Listing positioning for Polystick XFR and Polyanchor XFR underlayments and specified low-slope modified bitumen assemblies ^[23]. The main limitation is that Polyglass does not supply turnkey residential roofing, ember-resistant vents, or guaranteed insurance approval, and no public installed pricing was found ^[23].

Research Snapshot

Why Polyglass Qualified for This Study

Questions explored

• Is Polyglass a good choice for wildfire-resistant fire-rated roofing?
• Why did AI platforms include Polyglass in a wildfire roofing ranking?

Polyglass qualified because it publishes fire-rated roofing materials with UL Class A and California State Fire Marshal/CAL FIRE pathways that map directly to wildfire-zone code and insurance documentation needs. Four of seven platforms named it in the ranking stage: Claude, DeepSeek, Grok, and Kimi, at ranks 6, 7, 5, and 6 respectively. The remaining three platforms evaluated fit but did not name Polyglass during ranking discovery, so the 57.1% share reflects ranking-stage mentions only, not a rejection of the product.

The qualification rests on documented product credentials rather than installation service. Polyglass publishes Polystick XFR and Polyanchor XFR as underlayments used in specified ASTM E108/UL 790 Class A roof assemblies, with the rating applying to the tested assembly and installation conditions rather than automatically to every roof using the product ^[23]. Polyglass also describes UL Class A fire-rated modified-bitumen assemblies and a CAL FIRE-listed low-slope system for wildfire-zone applications ^[10]. California OSFM states that products in its WUI handbook are reviewed for California Building Code Chapter 7A compliance, which is the regulatory context buyers in wildfire zones are trying to satisfy ^[33].

Independent trade coverage supports the CAL FIRE milestone. Polyglass USA received CAL FIRE Building Materials Listing approval for a Class A fire-rated low-slope modified bitumen roofing system, confirming compliance with California Building Code Chapter 7A and wildfire performance standards under ASTM E108 and UL 790 ^[40]. One independent outlet described Polyglass as the first manufacturer to receive CAL FIRE BML approval for a complete low-slope Class A fire-rated modified bitumen roofing system ^[29]. That "first" framing is a company and trade-press claim; the checked sources do not independently verify priority over every competitor.

This review sits inside a broader comparison of Wildfire resistant fire rated roofing providers, and Polyglass should be read as one material-system option within that wider roofing services landscape rather than as a standalone contractor.

The service or product in focus

Questions explored

• Which Polyglass product should a homeowner specify for a wildfire-resistant fire-rated roof?
• Is Polystick XFR or Polyanchor XFR the right Polyglass underlayment for my roof covering and slope?

The most relevant Polyglass offering for this use case is the Burn-Shield Technology system built around two underlayments: Polystick XFR and Polyanchor XFR, plus specified UL Class A and CAL FIRE BML-listed low-slope modified bitumen assemblies. These are components installed beneath an approved roof covering, not finished roof coverings themselves.

Polystick XFR is described as a self-adhered, high-temperature underlayment for metal and other approved roof coverings, and Polyglass documentation lists Class A configurations for metal panels, asphalt shingles, and other coverings with assembly-specific UL listing references ^[19]. Independent product coverage states Polystick XFR helps combustible decking achieve a UL Class A rating and can withstand temperatures up to 265°F ^[38]. Polyglass states Polystick XFR achieves UL Class A fire protection in a single layer rather than the typical multi-layer solution ^[1].

Polyanchor XFR is presented as an ember- and water-resistant underlayment with Burn-Shield Technology, referencing California WUI applications, Class A requirements, UL classification, and California State Fire Marshal listing references ^[23]. It is described as ideally suited for mechanically attaching under clay/concrete tile roof covering systems where ember resistance is required, and for full roof coverage on combustible decks under Class A roof coverings to protect against burning embers ^[13]. One product document references CAL FIRE BMS listing 8180-2305:0504 for specific fire-rated assemblies ^[24].

For low-slope roofs, Polyglass publishes UL Class A fire-rated modified-bitumen systems and describes CAL FIRE-listed low-slope systems, including torch-applied and self-adhered installations ^[10]. Independent reporting states Polyglass is the first manufacturer to receive CAL FIRE BML approval for a complete low-slope Class A fire-rated modified bitumen roofing system ^[29].

What the AI Platforms Agreed About

Questions explored

• What do AI platforms agree on about Polyglass for wildfire-resistant fire-rated roofing?
• Does Polyglass hold recognized Class A and CAL FIRE credentials for wildfire zones?

Platforms broadly agreed on three points: Polyglass holds Class A and CAL FIRE-related credentials, its XFR underlayments are positioned for wildfire and WUI use, and it is a materials manufacturer rather than an installing contractor.

On credentials, multiple platforms cited the CAL FIRE BML listing and UL Class A positioning. Polyglass meets wildfire code demand with complete Class A fire-rated roofing systems listed in CAL FIRE's BML and offers UL Class A fire-rated roofing assemblies for commercial and residential use ^[10]. The CAL FIRE Building Materials Listing confirms Polyglass systems meet fire performance standards under ASTM E108 and UL 790 ^[34]. Polystick XFR and Polyanchor XFR are Class A CAL FIRE BML-listed underlayments meeting or exceeding California WUI code requirements for steep-slope roofing ^[29].

On wildfire positioning, Burn Shield Technology is designed to slow fire spread and provide additional time for occupants and emergency responders during wildfire incidents in WUI zones, and is incorporated in Polystick XFR and Polyanchor XFR ^[28]. Polyglass states Polystick XFR and Polyanchor XFR are designed to resist ignition, slow fire propagation, and help limit ember penetration ^[3].

On entity type, platforms converged on the same structural point: Polyglass is a manufacturer and supplier of roofing and waterproofing products rather than an installation contractor, so a homeowner needs a separate licensed roofer ^[2]. OpenAI put it plainly: Polyglass is a good fit as a fire-rated roofing-material manufacturer for homeowners whose contractor can install a complete, specifically listed roof assembly, but it is not itself a residential roofing contractor ^[23].

Where the AI Platforms Disagreed or Were Uncertain

Questions explored

• Do AI platforms disagree about whether Polyglass is a strong or mixed fit for wildfire roofing?
• Is Polyglass insurance eligibility support for wildfire roofing verified or uncertain?

Fit ratings diverged. Anthropic, Google, and Grok rated Polyglass a strong fit; OpenAI and Perplexity rated it good; DeepSeek and Kimi rated it mixed. That spread reflects a real ambiguity: platforms that weighted product credentials heavily rated it higher, while platforms that weighted turnkey service and installation accountability rated it lower.

Insurance support was the clearest uncertainty. No reviewed source establishes insurer acceptance, premium discounts, or guaranteed eligibility based on Polyglass products ^[23]. Polyglass stated that installations may help property owners qualify for insurance incentives under California's Safer from Wildfires program ^[40]. That is a "may help" claim, not a guarantee, and no quantified discount amounts were published.

Ember-resistant venting integration was also unresolved. The reviewed Polyglass product materials address roof membranes and underlayments but do not establish that Polyglass supplies or integrates ember-resistant vents; vent, eave, soffit, gutter, and opening protection must be specified separately ^[23]. One platform noted Polyglass manufactures advanced underlayment membranes and low-slope roofing systems but does not directly produce or integrate specialized mechanical roof vents or ember-resistant venting hardware ^[15].

Other conflicts and gaps: Burn Shield patent status is reported inconsistently as "patent pending" in older sources and "recently patented" in 2025-2026 sources; the precise current status and scope of CAL FIRE BML listing 8180-2305:0504 should be checked in the official OSFM database before relying on it for permitting; and the reviewed sources do not independently confirm UL listing identifiers through a publicly accessible UL record ^[23].

Features for this home service need

Questions explored

• What fire-rated features does Polyglass offer for wildfire-zone roofs?
• Does Polyglass provide ember-resistant venting or only roof membrane products?

Polyglass covers the fire-rated membrane layer well and does not cover the full home-hardening envelope. Its relevant capabilities are Class A assembly documentation, ember-resistant underlayment technology, and California WUI code alignment.

Class A fire-rated material expertise: Polyglass publishes Polystick XFR and Polyanchor XFR as underlayments used in specified ASTM E108/UL 790 Class A roof assemblies, with the rating tied to the tested assembly and installation conditions ^[23]. Polystick XFR documentation lists combinations with approved metal panels, asphalt shingles, and other roof coverings and directs users to specific UL listings, including TGFU.R25992 or TGDY.R25992 depending on the assembly ^[21].

Wildfire and ember resistance: Polyanchor XFR is marketed as an ember- and water-resistant underlayment with Burn-Shield Technology, and Polyglass identifies applications in wildfire-prone areas and under Class A coverings ^[23]. Burn Shield Technology integrates specialized fire-resistant materials to impede flame spread within roofing systems and creates a barrier that increases the time for fire to penetrate the roof ^[31]. One platform reported that the product withstood burning embers and 1200°F blowing heat without igniting wood roof decking in testing, a company-reported test result ^[24].

California WUI and CAL FIRE relevance: Polyglass documentation references California State Fire Marshal listing and CAL FIRE BML listing 8180-2305:0504 for specific Polyanchor XFR assemblies ^[23]. California OSFM states that products in its WUI handbook are reviewed for Chapter 7A compliance, but the buyer must verify the current listing and exact assembly in the official BML system ^[33].

Steep-slope and low-slope applicability: Polyanchor XFR is described for mechanically attached installation under clay/concrete tile and for use under asphalt shingles; Polystick XFR is described as a self-adhered high-temperature underlayment for metal and other approved roof coverings ^[23]. Polyglass publishes UL Class A fire-rated modified-bitumen systems and describes CAL FIRE-listed low-slope systems ^[10].

Ember-resistant venting integration: not established. The reviewed materials do not show that Polyglass supplies or integrates ember-resistant vents, so that scope must be handled separately by the contractor ^[23].

Insurance eligibility support: unclear. No reviewed source establishes insurer acceptance, premium discounts, or guaranteed eligibility, though Polyglass stated installations may help qualify for incentives under California's Safer from Wildfires program ^[23].

Regional wildfire-zone experience: Polyglass explicitly markets Burn-Shield products for WUI and wildfire-prone areas and references California requirements, and documented commercial projects show contractor presence in Southern California counties and Florida ^[23]. The reviewed sources do not independently quantify regional installation experience or homeowner claim outcomes across the United States.

Pricing, contracts, and ongoing costs

Questions explored

• How much does a Polyglass wildfire-resistant fire-rated roof cost per square foot?
• What warranty and contract terms apply to Polyglass XFR underlayments?

No public homeowner retail, installed, or project pricing for the relevant Polyglass fire-rated products was identified in the reviewed materials. These are generally contractor-specified roofing materials rather than a published consumer roofing plan, and material price must be quoted through a distributor or roofing contractor ^[23].

Where partial figures exist, they are third-party estimates rather than Polyglass list prices. One independent source lists Polystick XFR at roughly $166.99 per roll covering about 160 sq ft (1.5 squares) ^[37]. Another independent estimate places Polyglass roofing material costs at $4 to $6 per square foot and complete installations at $7 to $11 per square foot ^[36]. Torch-down roofing installation, the category Polyglass manufactures in, is estimated at $350 to $700 per square installed depending on material quality, roof size, location, number of layers, and old roof removal ^[30]. These figures carry partial support strength and should be treated as rough market ranges, not quotes.

Additional costs to expect: distributor freight, delivery, waste, disposal, permit, inspection, deck-repair, flashing, ventilation, and accessory costs, plus separately sourced ember-resistant vents and other home-hardening components ^[23]. One platform listed old roof removal at $90–$100 per square, permits at $150–$1,000+ depending on locality, and demolition and disposal at $1–$5 per square foot ^[38].

Contract and warranty terms: no homeowner installation contract, cancellation policy, or standardized consumer service terms were identified ^[23]. Polyglass offers a standard 10-year limited material warranty, with a 10-year labor and material warranty available only through Polyglass Registered Contractor installation ^[24]. The Polyglass Contractor Program provides Material, Material & Labor, and NDL warranties up to 20 years, with extended warranties up to 30 years for higher tiers ^[6]. Polystick XFR offers up to a 30-year warranty when installed by a Polyglass Registered Contractor, and warranty coverage applies when two plies of Polystick XFR are installed by a certified contractor ^[20]. Warranty scope, installer qualification requirements, product registration, and remedies should be obtained in writing before purchase ^[23].

Best Suited For

Questions explored

• Who is Polyglass best suited for in a wildfire risk zone?
• Is Polyglass a good fit for a California WUI homeowner needing a Class A roof?

Polyglass is best suited to buyers who already have a qualified local contractor and need a precisely documented Class A/WUI roof assembly. It fits California and other wildfire-risk jurisdictions requiring a documented Class A roof assembly, steep-slope roofs using asphalt shingles, clay/concrete tile, or approved metal coverings, low-slope roofs where the contractor can install the exact tested Polyglass modified-bitumen assembly, and projects needing product documentation for permitting or insurer review ^[23].

It also fits homeowners with metal, steel, copper, or standing-seam metal roof installations seeking UL Class A fire ratings with minimal material layers, properties in California or other states with strict WUI building codes requiring CAL FIRE-compliant materials, and residential projects combining fire resistance with waterproofing and weathering performance ^[38]. Polyglass underlayments are recognized by the FORTIFIED Roof program developed by the Insurance Institute for Business & Home Safety, which adds a third-party program reference ^[42].

Probably Not Best Suited For

Questions explored

• Who should not choose Polyglass for wildfire-resistant fire-rated roofing?
• Is Polyglass a poor fit for a homeowner wanting one company to handle the whole roof?

Polyglass is probably not best suited for a homeowner seeking a single company to inspect, permit, install, and certify the entire roof ^[23]. It is a materials manufacturer, not an installing roofing contractor, so it does not directly deliver the finished fire-rated roof a homeowner buys ^[2].

It is also a weak fit for projects requiring a turnkey package that includes ember-resistant vents, eaves, gutters, siding, windows, and defensible-space work, since no verified integrated ember-resistant venting service was found ^[23]. Buyers who need explicit insurer documentation, installation warranties, or contractor network support that is not clearly published should look elsewhere ^[10]. Budget-conscious buyers seeking transparent, published pricing will find that Polyglass pricing requires direct quotation ^[36]. Installations where the proposed roof covering, deck, slope, fasteners, or installation method does not match a Polyglass listing are also poor candidates, because a contractor deviating from the listed configuration may lose the stated Class A or WUI compliance basis ^[23].

When Another Option May Be Better

Questions explored

• When is a local roofing contractor a better choice than specifying Polyglass materials?
• What is a better alternative to Polyglass for a homeowner outside California wildfire zones?

Another option may be better when the buyer needs inspection, permitting, installation, ventilation, flashing, and documentation handled by one party, which points to a local roofing contractor or design-build provider rather than a materials manufacturer ^[23]. A roofing system whose manufacturer publishes a complete residential assembly and clearly supports the buyer's exact roof covering, slope, jurisdiction, and insurer requirements may also be a better fit ^[23].

Geography matters. For a homeowner in a high-wildfire-risk state outside California such as Arizona, Colorado, Oregon, or Washington, CAL FIRE BML listings may have limited relevance and local building codes may differ ^[38]. Buyers who need a complete primary fire-rated roof covering in one product, or who have steep-slope residential roofs where underlayment-only solutions are insufficient for code compliance, may need a different category of product ^[24]. Buyers who prioritize national brand recognition and extensive regional contractor networks over CAL FIRE BML certification may also prefer a different manufacturer ^[38]. No publicly available independent analysis comparing Polyglass XFR performance to direct competitors in equivalent fire-rated underlayment categories was found in the reviewed sources ^[38].

Questions to ask before choosing a provider

Questions explored

• What should a buyer confirm with Polyglass and the contractor before signing a roofing contract?
• Which assembly and listing details must be verified before installing a Polyglass fire-rated roof?

Before buying, confirm the exact Polyglass product and current product-data-sheet revision that will be installed, and the complete UL or CAL FIRE assembly number for the proposed deck, slope, roof covering, attachment method, and number of plies ^[23]. Verify that the local building official accepts that exact assembly for the property's wildfire hazard zone and applicable WUI code, and that the contractor will provide the current UL classification, CAL FIRE BML record, installation details, and closeout photographs for permitting and insurance ^[23].

Confirm whether the homeowner's insurer accepts the exact completed assembly and what documentation or inspection it requires, and whether ember-resistant vents, soffits, eaves, skylights, gutters, valleys, and other vulnerable openings are included or separately specified ^[23]. Establish who is responsible if the installed configuration differs from the tested listing, and obtain the material warranty, workmanship warranty, installer requirements, maintenance obligations, and exclusions in writing ^[23]. Ask whether the proposed installation is self-adhered, mechanically fastened, torch-applied, or heat-welded, and whether local fire-safety controls are required during installation ^[23]. Also confirm whether a Polyglass Registered Contractor is available in the area and what the installed cost difference is versus a standard warranty ^[24].

The consensus assessment

Polyglass is a good fit for wildfire-resistant fire-rated roofing as a material system, and a mixed fit as a turnkey solution. Four of seven platforms named it in the ranking stage at an average rank of 6.0, and platforms agreed on its Class A and CAL FIRE credentials while disagreeing on overall fit strength. The strongest reason to consider it is documented Class A and CAL FIRE BML positioning for Polystick XFR and Polyanchor XFR underlayments and specified low-slope assemblies ^[23]. The main limitation is that Polyglass is a manufacturer, not an installer, and it does not supply ember-resistant vents, guaranteed insurance approval, or published installed pricing ^[23]. Buyers should treat Polyglass as a product to specify through a licensed contractor and verify the exact assembly, listing, and insurer acceptance before purchasing.

How This Review Was Produced

This review was generated from seven AI platform responses collected for the research date 2026-10-01, using the research prompt about a homeowner in a wildfire risk zone who needs a fire-rated roof to meet insurance requirements or local defensible space codes. Platforms evaluated fit for the use case, and ranking-stage mentions were counted only when a platform named Polyglass during discovery. Fit ratings by platform were: Claude strong, DeepSeek mixed, Gemini strong, Grok strong, Kimi mixed, ChatGPT good, Perplexity good. All included platforms evaluated fit, but platform_mentions counts only platforms that named the entity during ranking discovery. Citations are platform-reported evidence, not independently verified facts, and company-owned citations materially outnumber independent citations, so company claims should not be described as independently verified.

Research limitations

Platform-reported research dates differ from the authoritative run date: DeepSeek reported 2026-01-15 while the run research date is 2026-10-01, and platform-reported dates are provenance metadata that do not independently prove freshness. DeepSeek ran with search disabled, so its claims require explicit verification before being described as current facts. The supplied URLs were collected from platform responses and were not independently validated by the writer stage. One or more fetched domains were not corroborated by brand name or site identity metadata and were not used as official identity signals. The reviewed evidence is largely manufacturer-provided; independent evidence of real-world wildfire outcomes and regional installer performance was not identified. No public pricing, installer network terms, insurer endorsements, or homeowner service contract was identified. Conflicting product names, pricing, and capabilities were described rather than resolved, and buyers should verify them directly.

Sources

Company-Owned Sources

1. Burn Shield™ Technology - Polyglass U.S.A: https://polyglass.ca/burn-shield-technology/
2. Polyglass - Roofing and Waterproofing Systems: https://polyglass.us/
3. Fire-Resistant Roofing Materials for WUI Compliance - Polyglass: https://polyglass.us/blog/fire-resistant-roofing-materials-what-contractors-need-to-know-about-wildfire-risk-and-wui-compliance/
4. Polyglass Leads Fire Protection Innovation with Burn-Shield Technology® Patent and CAL FIRE BML Complete-System Listing: https://polyglass.us/blog/polyglass-leads-fire-protection-innovation-with-burn-shield-patent-and-cal-fire-bml-class-a-approval/
5. Superior Fire Protection in Wildland-Urban Interface (WUI) Areas with Polyglass Burn-Shield Technology: https://polyglass.us/blog/superior-fire-protection-in-wildland-urban-interface-wui-areas-with-polyglass-burn-shield-technology/
6. Join Polyglass Contractor Program: https://polyglass.us/contractor-program/
7. Find Roofing Contractors: https://polyglass.us/find-us/
8. CAL FIRE BML Approval: A Milestone for Low-Slope Roofing: https://polyglass.us/news/cal-fire-bml-approval-a-milestone-for-low-slope-roofing/
9. Polyglass First to Secure CAL FIRE Approval for Low-Slope Roofing Systems: https://polyglass.us/news/polyglass-first-to-secure-cal-fire-approval-for-low-slope-roofing-systems-ahead-of-wui-2025/
10. Fire-Resistant Roof Systems: https://polyglass.us/product-type/modified-bitumen-membranes/fire-resistant-solutions/
11. Burn-Shield Technology® | Fire Resistant Roofing | Polyglass: https://polyglass.us/product-type/technology/burn-shield-technology/
12. Roof Underlayments: https://polyglass.us/product-type/underlayments/
13. Polyanchor® XFR - FORTIFIED Roof™ Solutions: https://polyglass.us/product/polyanchor-xfr/
14. Polystick® XFR | Waterproofing Underlayment - Polyglass: https://polyglass.us/product/polystick-xfr/
15. Polyglass Product Categories Catalog: https://polyglass.us/products/
16. Commercial Roofing Projects: https://polyglass.us/project-type/commercial/
17. Residential Projects | Polyglass: https://polyglass.us/project-type/residential/
18. Fire Resistant Solutions - Polyglass: https://polyglass.us/solutions/fire-resistant-solutions/
19. Polystick XFR Brochure: https://polyglass.us/wp-content/uploads/2020/04/2024-Polystick-XFR-Brochure.pdf
20. POLYSTICK® XFR FIRE RESISTANT SELF-ADHERED ROOF UNDERLAYMENT: https://polyglass.us/wp-content/uploads/2020/04/polystick-xfr-brochure.pdf
21. Polystick XFR Product Data Sheet: https://polyglass.us/wp-content/uploads/2020/04/polystick-xfr-pds.pdf
22. Polyanchor XFR Technical Specifications Sheet: https://polyglass.us/wp-content/uploads/2023/10/Polyanchor-XFR-PDS.pdf
23. Polyanchor XFR Product Data Sheet: https://polyglass.us/wp-content/uploads/2024/01/Polyanchor-XFR-PDS.pdf
24. POLYANCHOR® XFR: https://polyglass.us/wp-content/uploads/2024/08/2025-Polyanchor-XFR_web.pdf
25. Polystick-Polyanchor-XFR-Brochure: https://polyglass.us/wp-content/uploads/2026/09/Polystick-Polyanchor-XFR-Brochure_web7.pdf
26. Official pricing and terms source: https://polyglass.us/terms/

Independent Sources

27. Pricing | Epic Roof Replacement: https://epicroofreplacement.com/pricing/
28. Polyglass secures CAL FIRE approval for fire-resistant roofing systems: https://firebuyer.com/polyglass-cal-fire/
29. Patented Polyglass Technology Achieves CAL FIRE Building Materials Listing: https://fmindustry.com/2026/03/30/patented-polyglass-technology-achieves-cal-fire-building-materials-listing/
30. 2026 Torch Down Roofing Costs: https://homeguide.com/costs/torch-down-roofing-cost
31. Polyglass First to Secure CAL FIRE Approval for Low-Slope Roofing Systems at WUI 2025: https://informedinfrastructure.com/100261/polyglass-first-to-secure-cal-fire-approval-for-low-slope-roofing-systems-at-wui-2025/
32. Polyglass Leads Fire Protection Innovation With Burn Shield Patent And Cal Fire Bml Class A Approval: https://informedinfrastructure.com/post/polyglass-leads-fire-protection-innovation-with-burn-shield-patent-and-cal-fire-bml-class-a-approval
33. Building Materials Listing: https://osfm.fire.ca.gov/what-we-do/fire-engineering-and-investigations/building-materials-listing
34. Polyglass Leads Fire Protection Innovation with Burn Shield Patent and CAL FIRE BML Class A Approval: https://www.azobuild.com/news.aspx?newsID=24019
35. Why Work with a Polyglass Registered Contractor?: https://www.dolanroofing.com/polyglass-roofing-contractor/
36. Polyglass Roofing Price: https://www.indexbox.io/search/polyglass-roofing-price/
37. Polystick XFR Fire Resistant Underlayment Product Page: https://www.kvlumber.com/shop/roofing/felts/polystick-xfr-fire-resistant-1-5sqroll-metal-roofing-underlayment/
38. Polyglass Polystick XFR Self-Adhering Fire-Resistant Roof Underlayment: https://www.protoolreviews.com/polyglass-polystick-xfr-self-adhering-fire-resistant-roof-underlayment/
39. Polyglass Earns CAL FIRE Class A Approval for Low-Slope System: https://www.roofingcontractor.com/articles/101234-polyglass-earns-cal-fire-class-a-approval-for-low-slope-system
40. Polyglass Earns Fire Rating for Roofing System: https://www.roofingcontractor.com/articles/102045-polyglass-earns-rire-rating-for-roofing-system
41. Polyglass Leads Fire Protection Innovation with Burn Shield Patent and CAL FIRE BML Class A Approval: https://www.waterproofmag.com/2025/06/polyglass-leads-fire-protection-innovation-with-burn-shield-patent-and-cal-fire-bml-class-a-approval/
42. Fall 2025 News: https://www.waterproofmag.com/2025/09/fall-2025-news/