Quick Answer
The 2026 implementation phase of the EU Energy Performance of Buildings Directive (EPBD) is a reason to make renovation tenders more precise, not a reason to use one generic Europe-wide window or door specification. Before requesting a quotation, define the project location, building use, thermal target, exposure, glass, interfaces, evidence requirements and local compliance route. A supplier can help review the schedule; the project team must confirm the applicable rules and performance evidence.
Why EPBD news matters to window and door buyers in 2026
On 15 July 2026, the European Commission announced infringement procedures for all EU Member States because the recast EPBD had not been fully transposed by the general deadline of 29 May 2026. One day earlier, the Commission released its first assessment of draft National Building Renovation Plans, which are intended to support the Directive's implementation and are due in final form by 31 December 2026.
For a renovation buyer, the immediate lesson is practical: specifications and evidence requests may become more important as national renovation policies develop. It does not mean that every country now has identical window values, test routes or tender forms. The EPBD provides a European framework; national law, local building rules, project type and the issued tender documents still determine what must be supplied.
That distinction matters when a buyer asks for "EPBD-compliant windows." A useful quotation request needs a defined project requirement, not a label alone.
The 2026 renovation tender checklist
Use this checklist before sending a window or door RFQ to a manufacturer, fabricator or distributor.
| Tender input | What to state | Why it prevents rework |
|---|---|---|
| Project and location | Country, city, building use, renovation scope and target handover date | Applicable requirements, climate and logistics cannot be inferred from "Europe." |
| Drawings and openings | Current elevations, opening sizes, sill/head/jamb details and installation condition | Frame size and interface details affect both performance and production feasibility. |
| Required thermal outcome | Issued energy target or local requirement, plus the calculation basis and responsible party | A requested U-value only makes sense when its unit, boundary and configuration are clear. |
| Glazing and solar-control brief | Safety-glass needs, visible-light/privacy needs, shading concept and orientation | Glass cannot be selected responsibly from a single marketing term such as "energy saving." |
| Air, water and wind exposure | Project criteria, building height, facade zone, exposure and any required test method | Performance classes and test methods must be matched to the actual project requirement. |
| Opening, hardware and safety | Opening type, ventilation use, access, fall protection, fire strategy and security needs | A window that performs in a test may still be unsuitable for the room operation. |
| Interfaces | External shading, facade insulation, membranes, drainage, cladding and handover responsibilities | Many site failures occur at interfaces, not in the frame description alone. |
| Evidence request | Named standards, test reports, declarations, calculation inputs, samples and approval route | It keeps "available on request" from becoming an unsupported promise. |
| Change control | Approved substitution process, tolerances, finish samples and document version dates | It protects the project when glass, hardware or profiles change after quotation. |
Start with a performance brief, not a product name
In a renovation project, a product name such as "thermal-break aluminium window" is a starting point, not a complete specification. The actual assembly can vary by profile, frame depth, glass build-up, spacer, opening type, hardware, sealing design and installation detail. A stated performance value may also use a different calculation or test boundary from the one requested in the tender.
For background on the terms buyers commonly encounter, see SGL's window U-value, SHGC and thermal-performance guide. Use it as vocabulary support, not as a substitute for the issued project criteria.
The same applies to solar control. West-facing glazing, exterior shading, overheating risk and ventilation operation should be reviewed as one facade decision. Do not assume that lower solar gain, larger opening area or an openable sash is automatically appropriate for every room. Rain, wind, acoustics, insects, fall protection, security and local fire strategy may change the correct choice.
What a supplier can review - and what the project team must verify
A manufacturer can usually review drawings, proposed window types, opening sizes, glass options, finishes and hardware choices for a quotation. SGL's aluminum window range is organised around project-dependent configurations, and its customization support page invites buyers to share drawings and requirements.
However, a supplier should not be asked to make unsupported declarations. The following must remain project-specific and require evidence or formal confirmation:
- Compliance with a named national or municipal rule;
- Final U-value, g-value/SHGC, acoustic, air, water or wind performance;
- Test-report applicability to the final size, opening and configuration;
- Certification, fire, security, safety-glass or accessibility status;
- Compatibility with shading, facade, membranes or installation systems; and
- Warranty, installation responsibility and handover acceptance criteria.
Mark these items requires validation until the project team has the applicable documents and the supplier has confirmed the final configuration. This is not a delay tactic; it is what makes a quotation comparable and a technical submittal reviewable.
A better first inquiry for a renovation project
Instead of sending only quantities and photographs, send the following package:
- Current drawings, window/door schedule and project location;
- Existing opening and facade-condition photographs;
- Required performance documents or the design team's written criteria;
- Intended glass, colour, opening and hardware preferences;
- Exterior shading and insulation-interface details, if applicable; and
- The decision date, required samples and approval workflow.
SGL can use this information to discuss a preliminary product configuration and quotation path. For a project review, send the drawing and specification package to SGL. Final pricing, documentation and suitability depend on the confirmed project inputs.
FAQ
Does the EPBD require the same window performance in every EU country?
No. The Directive establishes a European framework, while Member States implement it through national measures. Project location, building type, renovation scope and issued requirements must be checked before any specific performance or compliance claim is made.
Can a supplier guarantee an EPBD-compliant window from a photo or a basic size list?
No. A reliable answer needs the final configuration and the applicable national/project criteria. Profile, glass, opening type, hardware, installation and testing scope can all affect the result.
Which documents should be requested before a window or door order is released?
Request the approved schedule, product configuration, drawings, named evidence requirements, available test or declaration documents, finish and glass samples where required, and a controlled record of approved substitutions. Confirm which party owns installation and final compliance checks.
External Sources and Notes
- European Commission, 15 July 2026: Member State transposition of the recast EPBD
- European Commission, 14 July 2026: first assessment of National Building Renovation Plans
- European Commission: Energy Performance of Buildings Directive overview
Editorial note: This article is a procurement and specification guide, not legal, energy-modelling or certification advice. National law, project documents and product evidence must be checked before release for manufacture or installation.
