jm.com
Insulation Systems, Commercial Roofing and Engineered Products | Johns Manville
Last scanned Jul 22, 2026, 8:45 PM · 1 view
Overall score
Fair
Summary
Johns Manville is committed to manufacturing premium-quality insulation, commercial roofing and building materials. This website uses jQuery hosted on Fastly. SEO is good (80/100) and accessibility is fair (60/100). Security scores excellent (90/100) and performance fair (65/100). Top issue: Title longer than 60 characters.
Johns Manville is committed to manufacturing premium-quality insulation, commercial roofing and building materials. We measure success by the relationships we build and the positive impacts we have on our employees and customers.
- United States
- Hosted on Fastly
Top issues to fix
7 issues found · 2 high priority
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Title longer than 60 characters
SEOShorten the title to under 60 characters so search results don't truncate it.
Meta description longer than 160 characters
SEOTrim the meta description to under 160 characters to avoid truncation in search results.
No structured data (JSON-LD) found
SEOAdd JSON-LD (Organization, Article, Product…) to become eligible for rich results.
Missing html lang attribute
AccessibilitySet <html lang="…"> so screen readers pick the right pronunciation rules.
+1 more issue — details in the sections below.
SEO
3 issue(s) found
Performance
2.00 s
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Organization
Company details published in this site's own structured data.
Johns Manville is committed to manufacturing premium-quality insulation, commercial roofing and building materials. We measure success by the relationships we build and the positive impacts we have on our employees and customers.
Contact
Email, phone, and address published on this site's own pages.
Meta tags
- Title
- Insulation Systems, Commercial Roofing and Engineered Products | Johns Manville
- Description
- Johns Manville is committed to manufacturing premium-quality insulation, commercial roofing and building materials. We measure success by the relationships we build and the positive impacts we have on our employees and customers.
- Canonical
- https://www.jm.com/
- Language
- Charset
- UTF-8
- Viewport
- width=device-width, initial-scale=1, user-scalable=no
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
Hosting & CDN
- Hosting provider
- Fastly
- CDN provider
- —
- IP address
- 151.101.195.10
- ASN
- AS54113 (FASTLY - Fastly, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX | — |
| TXT | — |
| NS | — |
| CAA | — |
| CNAME |
|
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- GlobalSign nv-sa
- Subject
- www.jm.com
- Valid from
- Jan 21, 2026
- Valid to
- Feb 22, 2027
- Days until expiry
- 214
- SAN domains
- www.jm.com, jm.com
Security headers
- Strict-Transport-SecurityEnabled
- Content-Security-PolicyMissing
- X-Frame-OptionsEnabled
- X-Content-Type-OptionsEnabled
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: gzip · 1 cookie(s) observed
Content & assets
Headings
H1 1 · H2 3 · H3 0
Links
176 internal · 15 external · 3 broken
Images
9 total · 9 missing alt
Scripts / Styles
15 scripts · 4 stylesheets
JS / CSS size
2.9 MB · 695 KB
Page size
129 KB
Robots.txt & Sitemap
- robots.txt
- Found
- Disallow rules
- 3
- sitemap.xml
- Found
- URLs in sitemap
- 2337
SEO issues
- Title longer than 60 characters
- Meta description longer than 160 characters
- No structured data (JSON-LD) found
Accessibility issues
- Over half of images are missing alt text
- Missing <html lang> attribute
Careers
This company has an active careers page, but individual openings weren't reliably parsed from it — visit the page above for current listings.
Team
People listed on this site's own team or about page.
Scan details
- Requested URL
- https://jm.com
- Final URL
- https://www.jm.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 2.00 s
- HTML size
- 129 KB
- Redirect chain
- https://jm.com → https://www.jm.com/
See something wrong on this report? Request a correction
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Frequently asked questions
- What technology does jm.com use?
- jm.com is built with jQuery.
- Is jm.com secure (HTTPS)?
- Yes. jm.com uses TLS 1.3 with a certificate issued by GlobalSign nv-sa, valid until Feb 22, 2027.
- Who hosts jm.com?
- jm.com is hosted on Fastly.
- What is jm.com's SEO score?
- jm.com scored 80/100 for SEO in the latest analysis (great).
- What is jm.com's overall website score?
- jm.com has an overall SiteGraph score of 75/100, combining SEO, performance, security, and accessibility.
- Is jm.com hiring?
- jm.com has a careers page; check it directly for current openings.
OpenGraph & Twitter Card
OpenGraph
Twitter Card