Les Grumdahl Window & Siding
Run a free full auditContact Information
-
Address
5210 McQuade Rd
Duluth, MN 55804 -
Phone
(218) 208-0600 -
Website
lesgrumdahl.com
Location
About Les Grumdahl Window & Siding
Les Grumdahl Window & Siding is a Window Installer in Duluth, MN, located at 5210 McQuade Rd. The company specializes in windows, siding, roofing, metal roofing, gutters, doors, and decks for residential and commercial customers. They offer certified installation crews and provide free estimates. The business holds a 4.30 rating based on customer reviews.
Founded in 1947 by Ivar Grumdahl as Grumdahls Rusco Awning and Window Company, the firm is now in its third generation. Les Grumdahl worked for his father early in life and rebranded the company in 1994. His son, Ryan Grumdahl, joined as a partner in 1995. The company operates as a local, family-owned business that provides comprehensive exterior solutions.
Les Grumdahl Window & Siding carries products for windows, siding, roofing, metal roofing, gutters, doors, and decks. They are a Certified GAF lifetime roofing contractor. Most products come with a limited lifetime warranty. The company states it will try to meet or beat any qualified written estimate. In 2021, they built a new warehouse, offices, and showroom in Duluth to better serve their customers.
The business maintains a positive rating from the customers who have reviewed it. Serving the Northland area for over 75 years, the company has established itself as a long-standing local provider. Their certified installation crews and limited lifetime warranties are key aspects of their service offering.
Les Grumdahl Window & Siding combines decades of local experience with certified installation services to meet the exterior needs of Duluth customers.
The business sits on McQuade Rd, just over a quarter mile from Talmadge River and Chez Pond. It is also roughly a mile from the intersection of North Shore Drive and Congdon Boulevard.
BizScoreAI gave the company a Content Quality score of 100 out of 100, meaning the site answers customer questions clearly enough for AI assistants to quote directly. The business also received an SEO Score of 81 out of 100, which helps search engines crawl and rank the site so nearby customers can find it.
Score Summary
BizScoreAI scanned the website lesgrumdahl.com on July 3, 2026. Les Grumdahl Window & Siding has a BizScore of 57 out of 100.
- AI Visibility37 out of 100
- SEO78 out of 100
- Google rating4.3 out of 5
AI visibility scan by category: AI Discovery 0 of 25 points, Structured Data 8 of 25 points, Content Readiness 16 of 30 points, AI Trust Signals 15 of 20 points.
Website audit sub-scores (out of 100): On-Page 78, Technical 78, Performance 75, Content 81.
Strengths: 7 checks passed. AI Content Blocking, Organization Schema, LocalBusiness Schema, Q&A Content, Meta Description, About/Team Page, XML Sitemap.
Areas to improve: 9 checks. llms.txt (failed), FAQPage Schema (failed), Google Business Profile Link (failed), Third-Party Review Links (failed), Speakable Schema (warning), Hyperlocal Targeting (warning), Local Multimedia (warning), Weak Heading Structure (warning), Author Signals (warning).
More Businesses in Duluth, Minnesota
- Village Caregiving of DuluthBizScore 80
- Bali Asian CuisineBizScore 78
- HearingLife of Duluth MNBizScore 74
- Gillette Children's - Duluth ClinicBizScore 72
- Johnson's Auto Repair of DuluthBizScore 72
- Thrivent Financial – DuluthBizScore 72
- Pain Clinic of Lake SuperiorBizScore 71
- Associated Chiropractic PhysiciansBizScore 71
- Kaski Inc.BizScore 71
- Twin Ports Pet SittersBizScore 70
Browse: Businesses in Duluth, MN · Window Installer in Minnesota · Businesses in Minnesota
AI engine reads
Read by AI engines 4 times in the last 30 days.
Counted from AI crawler and assistant visits to this page, identified by user agent.
See the full AI visibility report for this businessContact Les Grumdahl Window & Siding
Ways to improve this score
Run a free full auditWe improve your AI Visibility, SEO, and Local SEO scores as far as your current website allows.
Boost This Listing
Get a gold badge, photo gallery, and more.