Roofing Companies: AI Market Discovery Index

Tracking how AI platforms recommend roofing companies. This public AI Market Discovery Index is updated monthly since July 2026.

By Mark Huntley, J.D.Growth Strategist & AI Discovery Analyst

6 minutes read

Get my free AI Company Index Download sample PDF

On this page

01Benchmark Summary
02Current Benchmark at a Glance
03Research Scope and Qualification
04Current Brand Standings
05How to Read the Standings
06Recommendation Coverage Movement
07Largest Increase: CertainTeed
08Largest Decline: DECRA
09Category Leader: GAF
10Recommendation Placement Snapshot
11Buyer-Intent Distribution
12Historical Measurement Record

Benchmark Summary

GAF leads the Roofing Companies index with 54.5% valid recommendation coverage in September 2026, up from 48.4% in July 2026. Owens Corning holds the second position at 54.4% in September 2026, a gap of 0.1 points behind GAF.

The largest coverage increase from baseline to current came from CertainTeed, which rose to 52.1% valid recommendation coverage in September 2026, up from 44.1% in July 2026, a gain of 8.0 points — the largest among tracked brands. Malarkey also recorded a substantial gain, reaching 42.7% in September 2026, up from 35.1% in July 2026, a gain of 7.6 points. The largest coverage decline was DECRA, which fell to 0.0% in September 2026, down from 0.9% in July 2026.

Five brands recorded significant rises from baseline to current: Atlas Roofing, CertainTeed, GAF, Malarkey, and Owens Corning. DECRA was the sole significant decliner. GAF has risen in each of the two months since July 2026, moving from 48.4% in July 2026 to 54.5% in September 2026. Owens Corning likewise rose in each month, from 47.6% to 54.4% over the same span.

The benchmark began with 800 prompt-surface observations in each month and produced 539 qualified observations in September 2026 after qualification, up from 533 in July 2026.

AI recommendation trend

valid recommendation coverage, Jul 2026 to Sep 2026

GAF54.5%
Owens Corning54.4%
CertainTeed52.1%
Malarkey42.7%
Atlas Roofing27.5%
IKO11.9%
TAMKO10.6%
Erie Home2.6%
Power Home Remodeling2.4%
**CertainTeed0.0%
**Malarkey0.0%
DECRA0.0%

Current Benchmark at a Glance

Measure	Jul 2026	Sep 2026	Movement
Qualified benchmark observations	533	539	Up
Tracked brands	10	10	No change
Qualified surface breadth	6	6	No change
Recommendation-shaped answer share	24.0%	26.2%	Up 2.2 points
Valid recommendation shortlist share	48.0%	57.7%	Up 9.7 points
Leader by valid recommendation coverage	GAF (48.4%)	GAF (54.5%)	Leader held

Qualified surface breadth counts the canonical AI/search surface families with at least one qualified observation: ChatGPT, Copilot, Gemini, Perplexity, AI Overviews, and AI Mode. The benchmark recorded observations on Grok in August 2026; Grok observations are tracked separately and are not counted toward the six-family qualified surface breadth calculation.

For the strategic interpretation of this benchmark, read CiteWorks Studio's analysis of How AI Search Is Recommending Roofing Companies

Want the full Authority Index

The paid deep-dive adds competitor threat profiles, the gap matrix, citation failure map, platform-by-platform recovery roadmap, and client-specific economic modeling.

Request free AI Company Index

Research Scope and Qualification

The public benchmark is narrower than the raw collection universe by design.

Research stage	Jul 2026	Sep 2026	What it represents
Source prompt-surface observations	800	800	Total prompts collected across AI/search surfaces
Unique questions	455	492	Distinct questions after deduplication
Brand / competitor mentions	800	800	Prompts mentioning at least one tracked brand
Relevant observations	783	784	Prompts relevant to the benchmark scope
Irrelevant observations	17	16	Prompts outside the benchmark scope
Qualified benchmark observations	533	539	Public denominator for brand-level metrics

Brand-level percentages use the qualified observations as the public denominator, not the raw collection. AI Market Discovery Methodology

Current Brand Standings

This table is the primary current-month benchmark view.

Brand	Presence rate	Valid recommendation coverage	Top-three rate	Rank-one rate	Net sentiment
GAF	97.8%	54.5%	44.3%	24.1%	0.66
Owens Corning	94.2%	54.4%	42.3%	11.3%	0.66
CertainTeed	88.7%	52.1%	40.1%	9.5%	0.65
Malarkey	53.2%	42.7%	4.1%	0.7%	0.87
Atlas Roofing	38.6%	27.5%	0.7%	0.4%	0.77
IKO	32.5%	11.9%	1.1%	0.2%	0.46
TAMKO	31.9%	10.6%	2.2%	0.7%	0.38
Erie Home	4.3%	2.6%	1.1%	0.7%	0.70
Power Home Remodeling	3.7%	2.4%	1.1%	0.2%	0.70
DECRA	0.7%	0.0%	0.0%	0.0%	0.25

How to Read the Standings

Presence rate: Share of qualified observations where the brand is mentioned in the AI response.
Valid recommendation coverage: Share of qualified observations where the brand appears in a valid recommendation shortlist.
Top-three rate: Share of qualified observations where the brand appears in the first three recommendation positions.
Rank-one rate: Share of qualified observations where the brand is the first recommendation.
Net sentiment: Positive minus negative mention sentiment, scaled by total mentions.

For formulas and denominator rules, see AI Market Discovery Metric Definitions.

Recommendation Coverage Movement

Brand	Jul 2026	Sep 2026	Movement since baseline
Atlas Roofing	20.4%	27.5%	Up 7.1 points
CertainTeed	44.1%	52.1%	Up 8.0 points
DECRA	0.9%	0.0%	Down 0.9 points
Erie Home	2.6%	2.6%	No change
GAF	48.4%	54.5%	Up 6.1 points
IKO	12.0%	11.9%	Down 0.1 points
Malarkey	35.1%	42.7%	Up 7.6 points
Owens Corning	47.6%	54.4%	Up 6.8 points
Power Home Remodeling	2.8%	2.4%	Down 0.4 points
TAMKO	10.1%	10.6%	Up 0.5 points

Largest Increase: CertainTeed

CertainTeed recorded valid recommendation coverage of 52.1% in September 2026, up from 44.1% in July 2026, a gain of 8.0 points from baseline — the largest among tracked brands. The brand appeared in 281 valid recommendation shortlists out of 539 qualified observations in September 2026, compared with 235 out of 533 in July 2026. CertainTeed's presence rate moved from 87.1% to 88.7% over the same span.

Largest Decline: DECRA

DECRA recorded valid recommendation coverage of 0.0% in September 2026, down from 0.9% in July 2026. The brand appeared in 0 valid recommendation shortlists out of 539 qualified observations in September 2026, compared with 5 out of 533 in July 2026. DECRA's presence rate fell from 3.2% to 0.7% over the same span, and its recommendation coverage declined in each of the two months since July 2026.

Want the full Authority Index

The paid deep-dive adds competitor threat profiles, the gap matrix, citation failure map, platform-by-platform recovery roadmap, and client-specific economic modeling.

Request free AI Company Index

Category Leader: GAF

GAF leads the index with 54.5% valid recommendation coverage in September 2026, up from 48.4% in July 2026. GAF appeared in a valid recommendation shortlist in 294 qualified observations in September 2026. Owens Corning holds the second position at 54.4%, a gap of 0.1 points behind the leader.

Note that CertainTeed and Malarkey each recorded 0.0% valid recommendation coverage in August 2026 before recovering to 52.1% and 42.7% respectively in September 2026. Their mid-series readings of 0.0% in August 2026 were followed by full recovery to levels above their July 2026 baselines.

Recommendation Placement Snapshot

Coverage alone does not show how prominently a brand is recommended. Among the leading brands in September 2026, GAF held the highest rank-one rate at 24.1%, while Owens Corning recorded 11.3% and CertainTeed recorded 9.5%.

Brand	Jul 2026 top-three rate	Jul 2026 rank-one rate	Sep 2026 top-three rate	Sep 2026 rank-one rate
GAF	42.8%	28.7%	44.3%	24.1%
Owens Corning	40.9%	7.1%	42.3%	11.3%
CertainTeed	38.3%	7.5%	40.1%	9.5%

Similar coverage can still hide different first-position rates: GAF and Owens Corning stand close on coverage in September 2026 at 54.5% and 54.4%, but they differ by 12.8 points in rank-one rate at 24.1% versus 11.3%.

Buyer-Intent Distribution

In both July and September 2026, all qualified observations fell into the Brand Recommendation class.

Buyer-intent class	Jul 2026	Sep 2026
Brand Recommendation	533	539
Pricing & Value	0	0
Multi-Brand Comparison	0	0
Total qualified observations	533	539

The current public series measures Brand Recommendation discovery and does not yet contain qualified observations in the Pricing & Value or Multi-Brand Comparison classes. Price, value, and head-to-head comparison have no public signal in this data.

Historical Measurement Record

This is an evergreen benchmark URL. New measurements are added to the same report.

Measurement	Qualified observations	Coverage leader	Leader coverage	Largest coverage movement
Jul 2026	533	GAF	48.4%	GAF up 48.4% from zero baseline
Aug 2026	610	GAF / Owens Corning	51.6%	CertainTeed down 44.1 points
Sep 2026	539	GAF	54.5%	Malarkey up 42.7 points from August 2026

Evidence and Source Layer

The benchmark is built from prompt-level observations that retain the query, AI/search surface, answer, brand outcome, recommendation placement, sentiment, and, where exposed, citations or attributable evidence sources. Source presence is evidence about the information environment. It is not automatically proof that the source caused the recommendation.

Scope Boundaries

This public benchmark does not measure:

Market share or sales attribution
Every possible AI response to a given query
Organic-search ranking positions
Social mention volume
Private or sponsored channels (for example, brand-specific apps or paid placements)
Causality from a metric movement alone

A single monthly movement should not yet be treated as a trend on its own. The current dataset cannot answer pricing or head-to-head comparison questions.

About This Benchmark

The LLM Authority Index AI Market Discovery Index tracks how AI search and chat surfaces discover, evaluate, and recommend brands in a category. Each monthly measurement follows the same research protocol so category-level standings are comparable over time.

Get a Company-Level Authority Index

The public industry benchmark shows category-level standings. A company-level Authority Index can go deeper, showing how your brand appears across specific AI surfaces, geographies, and question types, with actionable steps to improve presence and recommendation rates.

Get my free AI Company Index

Want the full Authority Index

The paid deep-dive adds competitor threat profiles, the gap matrix, citation failure map, platform-by-platform recovery roadmap, and client-specific economic modeling.

Request free AI Company Index