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passivhaustrust.org.uk

https://passivhaustrust.org.uk· First analyzed 19 May 2026· Updated 19 May 2026
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passivhaustrust.org.uk
Desktop screenshot of passivhaustrust.org.uk
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Mobile

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Hosting Provider

Tagadab Ltd

IP Address

185.77.64.82

Site Location

🇬🇧 United Kingdomvia tld

Server Location

🇬🇧 Worcester, United Kingdom

ASN

AS34920

Organization

Tagadab Ltd

Server

Microsoft IIS

Nameservers

ns1106.ui-dns.org.ns1106.ui-dns.biz.ns1106.ui-dns.com.ns1106.ui-dns.de.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
947 ms10%
Speed Index
1.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
1.2 MB
56 requests
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Tagadab Ltd

Technology Stack

9 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Segment

Libraries

1
jQueryv1.11.2

Icon Libraries

1
Font Awesome

Email Marketing

1
Mailchimp

Web Servers

1
Microsoft IISv8.5

Frameworks

1
ASP.NET

CSS Frameworks

1
Bootstrap

SEO Analysis

D40/100
9
10
3
Meta Tags7/15
Content9/12
Headings1/8
Technical5/21
E-E-A-T0/7
Images1/7
Links5/5
URL5/5
Social0/5
Freshness0/4
Mobile4/4
Indexability3/3
P
passivhaustrust.org.ukpassivhaustrust.org.uk

Home

The Passivhaus Trust, UK, adoption of the Passivhaus standard and methodology. leading international low energy, design standard. eco buildings, reducing ene...

Description truncated.
Title Length4 chars

Recommended: 50-60 chars (~27px / 580px)

Description Length247 chars

Recommended: 120-160 chars

Issues (3)

  • • Missing H1 tag — every page should have exactly one H1
  • • Most images missing alt text (16/27) — critical for accessibility and SEO
  • • Missing viewport meta tag — page may not be mobile-friendly (Google uses mobile-first indexing)

13 issues found

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Local SEO

Local Search Readiness

7/100
Poor
2 13 2

This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

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AI & LLM Readiness

F27/100
Bot Access
20/25
Machine Read.
1/25
Schema Data
0/25
Citation
6/25

AI Bot Access

14/14 accessible
AI Search
OAI-SearchBot
PerplexityBot
Claude-SearchBot
Gemini-Deep-Research
DuckAssistBot
Training
GPTBot
ClaudeBot
Google-Extended
Meta-ExternalAgent
Bytespiderinfo
Amazonbot
Applebot-Extended
CCBotinfo
Fetch
ChatGPT-User

Machine Readability

llms.txt
llms-full.txt
Semantic HTML
Heading Hierarchy
Text ratio:7%
Words:243
Token eff.:Too Short

Structured Data

No Schema

Citation Readiness

Opening Summary51w
Descriptive Headings
Canonical URL
Open Graph0/3
Twitter Card0/3
Language Tag
Publish Date
Author Info
Lists
Tables
TL;DR / Summary
About Page Link
Recommendations (12)
AI readiness recommendation preview...
Upgrade to view recommendations

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Accessibility

WCAG 2.1 Compliance

Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
D
47/100
6
Passed
7
Critical
1
Warnings
Images & Alt Text
5/20
Checks if images have descriptive alt text for screen readers and visually impaired users.
Semantic Structure
4/20
Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
Forms & Inputs
10/15
Verifies form fields have labels, error messages are clear, and inputs are properly associated.
Color & Contrast
15/15
Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
Keyboard & Focus
9/15
Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
ARIA & Roles
4/15
Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
5 recommendations
  • •Accessibility recommendation preview...
Upgrade to view recommendations

Carbon Footprint

SWDM v4 · Eco-Score

Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
24/100
C
152 mg
CO₂e / view
1.2 MB
Page Weight
70%
Cleaner Than
New Visitor
174 mg
vs
Returning (cached)
87 mg
Annual (10K/mo)
18.3 kg
Emission Segments
Data Center
34 mg
Network
37 mg
Device
82 mg
Resource Breakdown
JavaScript
357.6 KB
Images
817.9 KB
CSS
39.3 KB
HTML
17.6 KB
Green Hosting Not Verified
Tagadab Ltd
7 recommendations
  • •Carbon footprint recommendation preview...
Upgrade to view recommendations
F

Security Score

21%Critical
Interactive

HTTPS

No WAF

70d

Certificate Details

Type

Domain Validated (DV)

Certificate Authority

Let's Encrypt

Key Algorithm

RSA (2048 bit)

Signature

SHA-256 with RSA

TLS Version

TLSv1.2

HTTP Protocol

HTTP/1.1

Valid From

29.04.2026

Valid Until

28.07.2026

Subject Alternative Names (4)

passivhaustrust.org.ukpht.surefirehosting.co.ukwww.passivhaustrust.org.ukwww.pht.surefirehosting.co.uk

SHA-256 Fingerprint

A0:74:5F:49:4C:EB:89:08:1D:A9:2F:7B:3E:B1:13:7C:8C:8A:3C:9B...

Top Recommendations

Security recommendation preview

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HTTP Headers

Developer Console

cache-control
🔴 No Cache(no-store, no-cache, must-revalidate, post-check=0, pre-check...)
content-length
17741
content-type
text/html; charset=UTF-8
date
Tue, 19 May 2026 13:05:47 GMT
expires
Thu, 19 Nov 1981 08:52:00 GMT
pragma
no-cache
Good Warning Issue

Email Infrastructure

Microsoft 365

Score

93

SPF
DKIM
DMARC

DMARC Policy

Quarantine (Moderate)

MX Records (1)

passivhaustrust-org-uk.mail.protection.outlook.com

Domain Information

passivhaustrust.org.uk

DNSSEC
Not Enabled

Privacy & Compliance

Cookie Consent Banner
Privacy Policy
Terms of Service

GDPR Indicators

Privacy policy page linked

Mobile Compatibility

Viewport & Responsive Test

Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
F
34/100
Not Mobile Friendly1 breakpoint
Viewport Meta
The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
Responsive Design
Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
Touch Icons
Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
Readable Font Size
Base font size should be at least 16px on mobile to ensure text is readable without zooming.
Relative Units
Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
No H-Scroll Risk
No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
Tap Targets OK
Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
No Fixed Widths
No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
4 recommendations
  • •Mobile compatibility recommendation preview...
Upgrade to view recommendations

Typography & Readability

Arial Rounded MT Bold + Arial

WCAG Partial
59/100
Readability
/30
18/30

14px · LH 1.50

Hierarchy
/20
7/20
WCAG
/25
14/25

2.08:1 min contrast

Performance
/25
20/25

System fonts

Heading Font

Arial Rounded MT Bold

Body Font

Arial

Sans14px

Contrast Ratio

2.08:1

14 issues

Reading Comfort

~80 CPL

Wide lines
16px
h4
14px
p
Major Second
Scale

⚠️ Small text: 14px may strain on mobile. Use ≥16px for WCAG compliance.

✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

⚠️ Wide lines: ~80 chars/line. Use max-width: 65ch for comfortable reading.

❌ Very complex text: Flesch score 26/100. Consider shorter sentences and simpler words.

⚠️ Partial contrast: 14 elements below WCAG AA threshold (min 2.1:1).

❌ Missing H1: Every page should have exactly one H1 element for SEO and accessibility.

Buy on MyFontsFlesch 26

Color Palette

10 unique colors
2.67:1 Fail Light
#ffffff
Background· 34.6%
#9b9fa2
Other· 4.7%
#072341
Primary· 8.5%
#196189
Accent· 7.7%
#2292b7
Accent· 6.5%
#e7f0f1
Secondary· 5.4%
#b5d6df
Secondary· 1.3%

Business & Marketing Stack

3 Tools Detected

Enterprise

Marketing Automation

1
MailchimpSMB

Email marketing and automation platforms

Behavior Analytics

1
Google AnalyticsFree

User behavior and product analytics

Social Media

1
Twitter/X WidgetsFree

Social widgets and sharing tools

3

Categories

3

Total Tools

0

Enterprise

0

Mid-Market

Assessment: Sophisticated marketing and sales technology infrastructure

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Scripts & Styles

19 Resources

16
Scripts
3
Styles
4
Async
0
Defer

Top Script Sources

local(5)downloads.mailchimp.com(2)maps.googleapis.com(2)gstatic.com(1)ssl.google-analytics.com(1)

Website Identity

passivhaustrust.org.uk

Location detected: 🇬🇧 United Kingdomvia tld
📧 Microsoft 365

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Last analyzed: 19 May 2026 at 13:06

Historical Analysis & Change Tracking