Building regulations for windows and doors can be confusing. A recent article urges our industry to clear up common myths about U-Values and Part L compliance . Here is what the study found—and how you can use these insights in your sales talks, marketing materials, and brand identity.
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Key Myths to Correct
1. Energy ratings (DSERs/WERs) apply only to replacements and extensions, not new homes. Using them for new builds risks non-compliance.
2. You cannot use the 1230 × 1480 CEN standard window as a proxy for all products. Part L requires calculations based on actual window sizes or recognised standard formats (BRE BR443).
3. Bifold doors must be tested in their worst-performing configuration, not a simpler French door sample. Standard sizes tied to door area must be used.
4. CE/UKCA marking is mandatory for all windows and doors sold in the UK, and thermal performance must be declared .
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1. Sales Tips
• Build Trust with Clear Data: In your next meeting, explain that your U-Values follow BRE BR443 rules and use real window sizes. This shows you know the rules and puts customers at ease.
• Offer Compliance Proof: Give prospects a one-page compliance sheet that lists Part L references, actual product sizes, and the CE/UKCA mark. A clear document helps you stand out.
• Use Case Study Examples: Say, “Our S140 Lift & Slide door passed with a U-Value of 1.2 W/m²K on its largest size—better than the standard requirement.” Real figures make your pitch memorable.
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2. Marketing Ideas
• Lead with Compliance Messaging: On brochures and your website, feature a banner: “Certified Part L Compliance – CE/UKCA Marked.” This headline addresses the myth that marking is optional.
• Educate with Simple Graphics: Create an infographic showing “Myth vs. Fact” for each misconception. Share it on LinkedIn or in email campaigns to position yourself as an expert.
• Highlight Innovation: Promote your enhanced thermal-break designs (like those in AluK’s S140 system) as proof that you exceed Part L requirements rather than just meeting them.
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3. Branding Strategies
• Adopt a Myth-Buster Tagline: Use a slogan such as “Real U-Values. Real Compliance.” This tells customers you stand for accuracy and honesty.
• Showcase Your Expertise: On social media, post short videos of your team explaining one myth each week. This ongoing series builds authority and trust.
• Partner for Authority: Collaborate with a recognised testing lab or a BRE-certified consultant. Co-branded content (“Tested by X Lab”) reinforces that your data is reliable.
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Conclusion
Dispelling myths about U-Values and Part L compliance is not just a technical task—it is an opportunity. By sharing accurate data, offering clear proof, and building your brand around honesty and expertise, you can win more sales, run smarter marketing campaigns, and strengthen customer trust.
Source: “Industry urged to confront persistent myths around u-values and Part L compliance,” Windows Active Magazine (March 21, 2025)