jm.com
Insulation Systems, Commercial Roofing and Engineered Products | Johns Manville
Last scanned Jul 29, 2026, 11:00 PM · 7 views
Overall score
Fair
Summary
Johns Manville is committed to manufacturing premium-quality insulation, commercial roofing and building materials. This website uses jQuery. SEO is fair (70/100) and accessibility is fair (60/100). Security scores excellent (90/100) and performance excellent (90/100). 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.
Top issues to fix
9 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.
robots.txt not found
SEOPublish /robots.txt with a Sitemap: directive to guide crawlers.
+3 more issues — details in the sections below.
SEO
5 issue(s) found
Performance
2.18 s
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Score history
+3 overall since Jul 22, 2026
- Overall
- 78
- SEO
- 70
- Security
- 90
- Performance
- 90
- Accessibility
- 60
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.
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
- —
- CDN provider
- —
- IP address
- —
- ASN
- —
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
- 207
- 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 · 20 broken
Images
9 total · 9 missing alt
Scripts / Styles
15 scripts · 4 stylesheets
JS / CSS size
6.5 KB · 4.5 KB
Page size
129 KB
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Title longer than 60 characters
- Meta description longer than 160 characters
- No structured data (JSON-LD) found
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Over half of images are missing alt text
- Missing <html lang> attribute
Scan details
- Requested URL
- https://jm.com
- Final URL
- https://www.jm.com/
- HTTP status
- 200
- HTTP version
- HTTP/2
- Response time
- 2.18 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?
- Hosting provider information for jm.com is not available yet.
- What is jm.com's SEO score?
- jm.com scored 70/100 for SEO in the latest analysis (fair).
- What is jm.com's overall website score?
- jm.com has an overall SiteGraph score of 78/100, combining SEO, performance, security, and accessibility.
- Has jm.com's score changed over time?
- jm.com's overall score has improved by 3 points (from 75 to 78) since Jul 22, 2026.
OpenGraph & Twitter Card
OpenGraph
Twitter Card