What LLMs cite
Best insulation for existing attic and wall cavities
From recent prompt runs · US · Updated October 25, 2026
GEOGrow tested this high-intent customer question across ChatGPT, Gemini, and Perplexity. Rankings below show which companies appeared most often in those responses — not who is independently the best.
Top brand
Greenfiber SANCTUARY
Leads across all key metrics
AI engines mentioning
1 of 3
Greenfiber SANCTUARY appears in 1 of 3 AI engines
#1 recommendations
1
Greenfiber SANCTUARY was the #1 recommendation once.
AI answer share
33%
Greenfiber SANCTUARY appears in 33% of answers in our tests
Top AI Answers
Which companies appear most often in AI responses?
Updated October 25, 2026
| # | Company | AI engines mentioning | #1 recommendations | AI answer share |
|---|---|---|---|---|
| 1 | Greenfiber SANCTUARY Claim your company | 1 of 3 | 1 | 33% |
| 2 | Owens Corning Claim | 1 of 3 | 1 | 33% |
| 3 | Greenfiber SANCTUARY Cellulose Insulation Claim | 1 of 3 | 1 | 33% |
| 4 | RetroFoam Claim | 2 of 3 | 0 | 67% |
| 5 | Greenfiber Claim | 1 of 3 | 0 | 33% |
| 6 | Owens Corning PROPINK L77 Fiberglass Insulation Claim | 1 of 3 | 0 | 33% |
| 7 | USA Premium Injection Foam Claim | 1 of 3 | 0 | 33% |
| 8 | Johns Manville Climate Pro Fiberglass Insulation Claim | 1 of 3 | 0 | 33% |
What Each AI Recommended
Recent answer snapshots by engine.
ChatGPT
- 1. Greenfiber SANCTUARY
- 2. RetroFoam
- 3. USA Premium Injection Foam
- 4. Owens Corning AttiCat
- 5. CertainTeed InsulSafe SP
- 6. Johns Manville Attic Protector
+5 more in this answer
Gemini
- 1. Owens Corning
- 2. Greenfiber
- 3. RetroFoam
- 4. Rockwool
- 5. Johns Manville
- 6. USA Insulation
+5 more in this answer
PerplexityWhat LLMs cite
Sources cited in the most recent prompt runs for this question. The mix varies by engine.
- reddit.com Anybody with insight/experience with attic ventilation here ...
- youtube.com Injection Foam Insulation in Existing Walls (Full Process)
- energystar.gov Measure Guideline: Wall Air Sealing and Insulation Methods in Existing Homes
- applegateinsulation.com Applegate Insulation
- certainteed.com InsulSafe SP Premium Blowing Wool
- consumerreports.org How to Shop for Home Insulation in 2025
- en.wikipedia.org Attic
- energy.gov Case Study: Cost Savings and Improved Occupant Comfort
Who's Winning in AI?
AI Leaderboard · Based on this buyer question
Greenfiber SANCTUARY currently leads this conversation. AI visibility leadership is valuable — but competitive markets shift fast.
Greenfiber SANCTUARY currently leads this conversation.
- #1
- #2 Owens Corning 33%
- #3
- #4 RetroFoam 67%
- #5 Greenfiber 33%
- #6
- #7
- #8
Get ahead of the competition
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How We Measure AI Answer Share
AI Answer Tracker by GEOGrow measures how companies appear when high-intent customer questions are asked across supported AI platforms. Results are observational snapshots and can vary by model, location, personalization, source availability, and date.
AI Answer Share is weighted recommendation appearances divided by all possible recommendation opportunities. Rankings shown here represent the responses collected during the stated research period and are not endorsements by GEOGrow. Method: 3 independent AI observations.
- Question tested
- Best insulation for existing attic and wall cavities
- Market
- US
- AI engines
- ChatGPT, Gemini, and Perplexity
- Research date
- October 25, 2026