Roofing Systems Patents: Who Leads, Where the Gaps Are 2026
- Concentrated at the top. The five most active filers account for 49.6% of all 119 records in scope, and the top ten reach 69.7% — a steep drop after the leader, who holds 16 records against 7 for fifth place.
- Filing has cooled since 2020. Activity peaked at 12 records in 2020, fell to 4 by the 2022 midpoint, and the trend into 2026 reads flat to declining even allowing for publication lag.
- Solar-integrated roofing is a distinct, smaller cluster. H02S (photovoltaic) classes touch 10.1% of records — a foothold, not a crowded field, next to the 99.2% baseline coverage of E04D roofing classes.
What this landscape covers
This analysis covers 119 published records filed between 2015 and 2026 that claim roofing systems, cool roof coatings or roof membrane assemblies alongside technical criteria such as solar reflectance index, wind uplift resistance, ponding water performance, green roof integration or service life. The scope is defined by IPC classes E04D5, E04D13 and C09D5 — roof coverings, roof structures and coating compositions — narrowed to filings that make an explicit performance claim rather than a generic roofing disclosure.
Records here are counted as families rather than raw documents, which keeps continuation filings and multi-jurisdiction duplicates from inflating any single assignee's apparent share. Publication typically lags filing by around 18 months, so the 2025-2026 figures in the trend chart will revise upward as later filings publish.
Filing trend and technical composition
Two views of the same 119 records: how filing activity has moved year over year, and which IPC subclasses the claims actually sit in.
A peak in 2020, then a decline
Filings rose to 12 in 2020, the high point of the window, then eased toward a 2022 midpoint of 4 and stayed low. Read the final one or two years as provisional — publication lag means 2025 and 2026 will fill in as later applications clear examination and publish.
Roofing dominates; adjacent classes are thinner
E04D (roofing and roof coverings) appears in 99.2% of the 119 records, confirming the scope is correctly centred. Layered products (B32B) reach 25.2%, building structures (E04B) 15.1%, and adhesives (C09J) 13.4%. Photovoltaic integration (H02S) and nonwovens (D04H) each sit at 10.1% — present but not saturated. Because a single record can carry several IPC codes, these shares are read against the 119-record total and add to more than 100%, which is expected.
Shares are the percentage of the 119 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Roofing Systems and Cool Roof Technology with Eureka
This page is one run against one query. Ask Eureka your own question about roofing systems and cool roof technology and every answer comes back with the patent numbers behind it.
Try EurekaThe most-cited records in this space
Adhesive formulations for roofing applications and related methods (US20230027429A1, BMIC LLC)
Some embodiments of the present disclosure relate to an adhesive formulation comprising a high viscosity silyl modified polymer. In some embodiments, the adhesive formulation may further comprise additional components, such as but not limited to, at least one moisture scavenger, at least one adhesion promoter, at least one catalyst, at least one filler, at least one plasticizer, at least one antioxidant, or any combination thereof. In some embodiments, the adhesive formulation may exclude a low viscosity polymer, or may include one in no more than a specified amount.Filed by BMIC LLC, published 2023-01-26. Abstract shown as filed.
View full filing| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4860509A | Photovoltaic cells in combination with single ply roofing membranes | 362 |
| 2 | US6990779B2 | Roofing system and roofing shingles | 149 |
| 3 | US9169646B2 | Low profile slate-style solar roofing system | 113 |
| 4 | US20030040241A1 | Roofing system and roofing shingles | 110 |
| 5 | US20050053746A1 | Highly reflective asphalt-based roofing membrane | 101 |
| 6 | US20050053745A1 | Highly reflective asphalt-based roofing membrane | 89 |
| 7 | US6238502B1 | Single-ply membrane roofing system | 71 |
| 8 | US6004645A | Single-ply membrane roofing system | 67 |
| 9 | US7070843B2 | Highly reflective asphalt-based roofing membrane | 59 |
| 10 | US7070844B2 | Highly reflective asphalt-based roofing membrane | 57 |
Citation counts are drawn from a searched corpus and skew toward older filings that have had more time to accumulate citations — treat them as a signal of influence on subsequent filers, not as a ranking of current technical importance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Three readings of the same dataset, aimed at where a filing or freedom-to-operate question would actually land.
The estate has a short head and a long tail
Five assignees hold roughly half of all records in scope, with the leader alone at 16 records against 7 for fifth place. Below tenth place the field fragments into single- and double-filing entrants, which is where freedom-to-operate searches often turn up unexpected blocking claims.
Filing has slowed since its 2020 peak
The trend line rose to a peak of 12 records in 2020 and has since eased, sitting at 4 by the 2022 midpoint. Combined with thin recent-year momentum among the leading assignees, this reads as a maturing claim space rather than an expanding one — though the final years will revise upward as publication catches up.
Solar-integrated roofing is a minority claim, not a fringe one
Photovoltaic classes appear in 10.1% of the 119 records — smaller than the B32B layered-products cluster at 25.2%, but a consistent enough presence to indicate an established sub-area rather than a one-off filing pattern. It sits alongside, not inside, the core E04D roofing baseline that covers 99.2% of records.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to roofing systems and cool roof technology, with the prior art for and against each one.
Who is filing, and who has gone quiet
The ranked leaders sit well ahead of a long tail, but recent-year filing counts show even the top names have mostly stopped adding new records.
One filer holds a clear lead
The top-ranked assignee holds 16 of the 119 records in scope, more than double the count at fifth place (7). That gap suggests a deliberate, sustained filing programme rather than opportunistic single filings.
The drop-off is steep past fifth place
Fifth place holds 7 records and tenth place only 3 — a fast decline that puts most of the ranked field well below double digits. Diligence work should not assume the top ten are evenly matched; the top five already carry the bulk of the concentration.
Leading assignees have largely stopped filing new records
Recent-year momentum figures show most of the leading assignees at zero new records in the latest year, with only one logging a single filing. That is consistent with the broader flat-to-declining trend and points to a claim space that established players consider adequately covered rather than one they are still building out.
| Assignee | Recent year | YoY |
|---|---|---|
| Rockwool AS | 1 | — |
| Elk Premium Building Products Inc. | 0 | — |
| Building Materials Investment Corp. | 0 | — |
| Johns Manville Corp. | 0 | — |
| BMIC LLC | 0 | — |
| Rockwool International A/S | 0 | — |
| KELLY THOMAS L | 0 | — |
| ROTTER MARTIN J | 0 | — |
Where to take this analysis
The dataset points to specific next steps depending on whether the question is offensive filing strategy or defensive freedom-to-operate.
Run a freedom-to-operate check on the long tail
Roughly a third of all records sit outside the top ten filers. A single-filing entrant can still hold a blocking claim on a narrow feature like a specific membrane seam geometry.
Explore the full assignee rankingWatch for renewed filing after the 2020 peak
Activity has cooled since 2020, but publication lag means 2025-2026 counts are not final. A fresh search closer to the next data refresh will show whether filing is genuinely declining or just under-reported.
Track filing trends over timeMap the photovoltaic-roofing overlap separately
H02S classes touch only 10.1% of records here. A dedicated search combining roofing IPCs with solar-power IPCs would surface filings this scope's keyword string does not catch.
Open a focused sub-search in EurekaCommon questions about this landscape
One assignee leads the ranked field with 16 of the 119 records in scope, more than double the count held by the fifth-place filer at 7. The top five combined account for 49.6% of all records, and the top ten reach 69.7%, so the field is concentrated at the top but not dominated by a single player. Below tenth place the ranking fragments into a long tail of assignees with just one or two filings each, so a full freedom-to-operate check needs to look past the leaders.
Filing peaked at 12 records in 2020 and has since eased, sitting at 4 by the 2022 midpoint, which reads as flat to declining rather than growing. Recent-year momentum data backs this up: most of the leading assignees show zero new filings in the latest year on record. That said, publication typically lags filing by about 18 months, so the final one to two years in any trend chart will always look thinner than they eventually turn out to be — treat 2025-2026 as provisional, not final.
E04D, covering roofing and roof coverings, appears in 99.2% of the 119 records in scope, confirming it as the anchor class for this technology. Layered products and laminates (B32B) follow at 25.2%, building structures (E04B) at 15.1%, and adhesives (C09J) at 13.4%. Photovoltaic integration (H02S) and nonwovens (D04H) each sit at 10.1%, marking them as established but not saturated sub-areas. Because records can carry multiple IPC codes, these shares are each measured against the full 119-record total and do not need to sum to 100%.
The clearest gaps sit in sub-areas with thinner coverage relative to the E04D baseline: photovoltaic and green-roof co-integration hardware, nonwoven substrate additives aimed at service life, and adhesive formulations that explicitly exclude low-viscosity polymer components. These branches show real filing activity but nowhere near the density of the core roofing membrane and shingle claims, which suggests room for a narrowly drafted first claim rather than a crowded prior-art field. Any white-space read should still be confirmed with a live search, since this landscape reflects a fixed search string and cut-off date.
With the top five assignees holding 49.6% of 119 records and the top ten holding 69.7%, this field sits toward the concentrated end: roughly half the estate belongs to a handful of filers, and the drop from fifth place (7 records) to tenth place (3 records) is steep. That said, 49 assignees appear in the ranking overall, so there is meaningful activity beyond the leaders — it is concentrated at the top with a genuine long tail beneath it, not a two-player market.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.