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bldr.com

https://bldr.com· First analyzed 07 May 2026· Updated 07 May 2026
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bldr.com
Desktop screenshot of bldr.com
Mobile screenshot of bldr.com
Mobile

Sponsored

Hosting Provider

Microsoft Azure
azure.microsoft.com

IP Address

40.117.138.103

Site Location

🇺🇸 Irving, United Statesvia schema_nap

Server Location

🇺🇸 Boydton, United States

ASN

AS8075

Organization

Microsoft Azure Cloud (eastus)

Server

*

Nameservers

udns2.cscdns.uk.udns1.cscdns.net.

Performance

97

Core Web Vitals

Weight

First Contentful Paint
1.0 s10%
Speed Index
1.3 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
437 KB
80 requests

Image Optimization

Lazy Load
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Infrastructure
Hosting
Microsoft Azure

Technology Stack

7 Technologies Detected

Analytics

2
Google Analytics
Google Analytics 4

Frameworks

1
Alpine.js

Libraries

1
jQueryv3.6.0

UI Components

1
Slick Carousel

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

SEO Analysis

A81/100
24
4
0
Meta Tags15/15
Content11/12
Headings8/8
Technical21/25
E-E-A-T2/7
Images5/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile1/4
Indexability3/3
B
bldr.combldr.com

Builders FirstSource | Building Supplies & Materials

Welcome to Builders FirstSource, the nation’s largest supplier of building products, components and services. Find a store near you or request a quote online!

Title Length52 chars

Recommended: 50-60 chars (~301px / 580px)

Description Length158 chars

Recommended: 120-160 chars

Issues (0)

    4 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    3 URLs

    3 sub-sitemaps

    robots.txt

    52 rules

    Sitemap reference found

    Local SEO

    Local Search Readiness

    23/100
    Needs Work
    7 13 1

    Sponsored

    AI & LLM Readiness

    D57/100
    Bot Access
    24/25
    Machine Read.
    14/25
    Schema Data
    4/25
    Citation
    15/25

    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.txtinvalid
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    navheader/footer
    Text ratio:6%
    Words:851
    Token eff.:Optimal
    Sections/1K:16.5
    Depth:2/5

    Structured Data

    2 JSON-LD
    Person×1.3
    sameAs entity links

    Citation Readiness

    Opening Summary34w
    Descriptive Headingsavg 3w
    Canonical URL
    Open Graph2/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (10)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    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.
    B
    78/100
    13
    Passed
    3
    Critical
    2
    Warnings
    Images & Alt Text
    18/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    17/20
    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
    11/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    7/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    2 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.
    68/100
    A
    44 mg
    CO₂e / view
    436.9 KB
    Page Weight
    90%
    Cleaner Than
    New Visitor
    50 mg
    vs
    Returning (cached)
    25 mg
    Annual (10K/mo)
    5.3 kg
    Emission Segments
    Data Center
    2 mg
    Network
    13 mg
    Device
    29 mg
    Resource Breakdown
    JavaScript
    123.7 KB
    Images
    9.1 KB
    CSS
    290.7 KB
    HTML
    13.5 KB
    Green Hosting Verified
    Microsoft Azure
    Provider Match
    3 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    D

    Security Score

    56%Poor
    Interactive

    HTTPS

    No WAF

    174d

    Certificate Details

    Type

    Organization Validated (OV)

    Certificate Authority

    Entrust Limited

    Key Algorithm

    RSA (4096 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/1.1

    Valid From

    28.10.2025

    Valid Until

    28.10.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (5)

    www.bldr.comapi.bldr.combldr.combuildersfirstsource.comwww.buildersfirstsource.com

    SHA-256 Fingerprint

    2F:FA:11:62:05:E5:23:C0:95:39:D0:09:8E:04:4E:BC:87:36:33:DE...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    cache-control
    🔴 No Cache(no-cache, no-store, max-age=0, must-revalidate)
    connection
    Keep-Alive
    content-encoding
    📦 Gzip(gzip)
    content-language
    en
    content-type
    text/html;charset=UTF-8
    date
    Thu, 07 May 2026 22:36:31 GMT
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    93

    SPF
    DKIM
    DMARC

    DMARC Policy

    Quarantine (Moderate)

    MX Records (1)

    bldr-com.mail.protection.outlook.com

    Domain Information

    bldr.com

    Domain Age
    27y 11m

    Created

    26.05.1998

    Expires

    25.05.2028

    Last Updated

    26.03.2025

    Registrar

    Network Solutions, LLC

    DNSSEC
    Not Enabled

    Privacy & Compliance

    OneTrust

    Cookie Consent Banner
    OneTrust
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: OneTrust
    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.
    C
    67/100
    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.
    Viewport
    width=device-width, initial-scale=1, shrink-to-fit=no
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Apotek Extra Condensed Bold + Acumin Pro Regular

    WCAG AAA
    73/100
    Readability
    /30
    19/30

    14px · LH 1.50

    Hierarchy
    /20
    18/20

    4.29x ratio · ✓ H1→H6

    WCAG
    /25
    22/25

    15.58:1 min contrast

    Performance
    /25
    14/25

    3 fonts · 6 req

    Heading Font

    Apotek Extra Condensed Bold

    Sans60px

    Body Font

    Acumin Pro Regular

    Sans14px

    Contrast Ratio

    15.58:1

    WCAG AAA (≥7:1)

    Reading Comfort

    ~42 CPL

    Narrow lines
    60px
    h1
    70px
    h2
    24px
    h3
    14px
    p

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

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

    ⚠️ Hard to read: Flesch score 37/100. Simplify sentences for wider reach.

    ✅ WCAG AAA contrast: All text meets 7:1 ratio (min 15.6:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 4.3x larger than body text.

    Buy on MyFontsFlesch 37

    Color Palette

    13 unique colors
    3.23:1 AA Large Light
    #8a827a
    Other· 19.6%
    #383531
    Other· 6.7%
    #002057
    Primary· 11.2%
    #dbe6ee
    Secondary· 6.1%
    #aebbc1
    Secondary· 5.8%
    #8a3038
    Secondary· 3%
    #0d1e40
    Accent· 0.8%

    Business & Marketing Stack

    5 Tools Detected

    Enterprise

    CRM Systems

    1
    SalesforceEnterprise

    Customer Relationship Management platforms

    Behavior Analytics

    2
    Google Tag ManagerFree
    Google AnalyticsFree

    User behavior and product analytics

    Feedback & Surveys

    1
    SurveyMonkeyMid-Market

    Survey and feedback collection tools

    Privacy & Cookies

    1
    OneTrustEnterprise

    Cookie consent and privacy compliance tools

    4

    Categories

    5

    Total Tools

    2

    Enterprise

    1

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    26 Resources

    20
    Scripts
    6
    Styles
    3
    Async
    0
    Defer

    Top Script Sources

    local(12)service.force.com(3)googletagmanager.com(2)cdn.cookielaw.org(1)player.vimeo.com(1)

    Website Identity

    Builders FirstSource

    Builders FirstSource

    Website

    Builders FirstSource, Inc. is a Fortune 500 company that is a manufacturer and supplier of building materials. The company is headquartered in Dallas, Texas, and is the largest supplier of building products, prefabricated components and value-added services in the US.

    www.bldr.com/
    27 years old

    6031 Connection Dr, Suite 400, Irving

    75039, Irving, TX

    US

    Location detected: 🇺🇸 United States, Irvingvia schema_nap
    Network Solutions, LLC📧 Microsoft 365en

    Sponsored

    Last analyzed: 07 May 2026 at 22:36

    Historical Analysis & Change Tracking