The Compliance Question Buyers Ask Too Late

An aluminum glass sunroom is usually quoted against one standard, and that is where the problem starts. A sunroom is not a single building product. Its vertical walls behave like windows or a facade; its roof is overhead glazing; and the whole assembly carries structural loads that a window never carries. Different parts fall under different documents, and the documents do not overlap neatly.

When an approval authority or an insurance assessor reviews a sunroom, they do not ask "which standard is this certified to?" They ask three separate questions: what governs the roof glazing, what governs the vertical openings, and what governs the structure that holds them. If the supplier answered with one certificate, two of the three questions remain open.

This article maps the scope boundaries, states where each standard stops, and lists the load and thermal declarations a compliant sunroom package should carry.

Scope Map: Which Document Covers Which Part

The practical consequence: EN 14351-1 alone cannot declare a sunroom roof compliant. That standard covers windows and pedestrian doorsets. Overhead glazing introduces post-breakage requirements that a vertical window standard does not address, because a broken vertical pane stays in its rebate while a broken overhead pane can fall onto occupants.

Roof Glazing: The Rule That Changes the Specification

Overhead glazing is governed by one overriding principle in every major code: if the glass can break and fall onto people below, the broken pane must remain supported. That single requirement drives the whole roof specification.

• Laminated interlayer on the inner ply. The lower ply of a roof unit is normally laminated so that, if it breaks, the fragments stay bonded to the interlayer instead of dropping. This is why a roof unit is specified differently from a wall unit even when both are double glazed.
• Tempered or heat-soaked outer ply. Where the outer ply is tempered, heat-soak treatment is commonly required to reduce the rate of spontaneous breakage from nickel sulphide inclusions, which are a known cause of failures that appear years after installation.
• Slope and drainage. A minimum roof pitch is required so water runs off rather than ponds. Ponding adds an unaccounted static load and concentrates dirt and thermal stress. The pitch is a compliance parameter, not a styling choice.
• Support condition and bite. Glass edge support length and the setting block arrangement determine the allowable span of each pane. The pane size limit is therefore a structural output, not a manufacturing preference.

Load Cases a Sunroom Must Declare

A sunroom roof is loaded in ways a window never is. These cases must be stated in the technical file, each with the value used and the deflection result.

The thermal movement row is the one that separates a designed sunroom from an assembled one. Long aluminium beams must be allowed to move, or the movement is transferred into the glass edges and the abutment to the host building. Both outcomes produce failures that appear long after handover, and neither is visible at inspection.

EN 13830 and AS2047: Where Each Stops

EN 13830 — curtain walls

EN 13830 is the harmonised product standard for curtain walls. It provides the framework for declaring performance of a non-loadbearing external glazed assembly: air permeability, watertightness, wind resistance, impact, thermal transmittance, and durability. Many sunroom manufacturers use it as the basis for the glazed envelope because a stick-built sunroom roof is constructed much like a curtain wall — mullions, transoms, pressure plates and caps.

What EN 13830 does not do is replace structural design. It assumes the assembly's structural adequacy has been established under the relevant structural codes. It also does not by itself satisfy overhead glazing post-breakage rules; those come from national provisions and from AS1288 in Australia.

AS2047 — windows and glazed doors

AS2047 is the Australian standard for windows and external glazed doors, including the test methods for deflection, operation, air, water and ultimate strength, and it references wind load classifications. For the vertical parts of a sunroom — the walls, sliding or folding openings, and doors — AS2047 is the right document, and the wind classification of the site (N1 to N6, or cyclonic C1 to C4) determines the required test pressure.

What AS2047 does not cover is the roof. A glazed roof is assessed under AS1288 and the structural codes. A supplier who answers an Australian buyer's AS2047 question with a roof certificate, or answers a roof question with an AS2047 certificate, has not answered the question.

Safety Glazing Locations in a Sunroom

Sunrooms concentrate every critical glazing location into one small building. Each of these needs safety glass with the correct break-safe behaviour, and the requirement does not depend on the glass being in a door.

1. Overhead glazing — laminated inner ply so fragments stay supported after breakage.
2. Low-level glazing — panes whose bottom edge falls within the critical zone above finished floor level require safety glass under IBC 2407 and equivalent rules.
3. Glazing beside doors and in door leaves — impact-rated safety glass, tested under EN 12600 or AS/NZS 2208.
4. Full-height panels with no protective barrier — laminated glass, or a barrier that satisfies the guarding load.
5. Roof glazing above occupied space — both the post-breakage requirement and, where the roof is accessible for cleaning, the access load case.

The declaration should list each location with the glass build used, rather than stating "all glass is safety glass". The second statement is unverifiable and is the most common wording gap we see in sunroom technical files.

Thermal and Condensation Declarations

A glazed roof has the worst thermal geometry of any building element: heat rises into it, solar gain concentrates in it, and its inside surface is the coldest surface in the room in winter. Three declarations belong in the file.

• U-value for the assembly. Quoted for the roof assembly and the wall assembly separately, calculated under EN ISO 10077, including the frame — not the centre-of-glass value, which is always better and therefore always misleading.
• Thermal bridging at the abutment. Where the sunroom meets the host building, the connection is a linear thermal bridge. Assessed under EN ISO 10211, and it is the usual location of the first mould.
• Solar gain and shading. Total solar energy transmittance (g-value) for the roof glazing, with the shading or ventilation strategy stated. A compliant roof with no solar control produces a room that cannot be occupied in summer, which is a performance failure even when every certificate is in order.

The continuous PA66-GF25 thermal break must run through the roof beams as well as the wall frames. A broken wall frame attached to an unbroken aluminium roof beam is a bridge, and the beam becomes the condensation surface.

Documentation Checklist for Approval

1. Structural calculation for the frame: beam sizes, spans, load cases used, deflection results, fixing schedule into the host building.
2. Roof glazing specification: glass build with laminated inner ply, maximum pane size, edge support, minimum pitch.
3. Vertical glazing test report to AS2047 or EN 14351-1 with the wind class stated.
4. Safety glazing schedule listing each critical location and the glass type used.
5. Thermal declaration: Uw for roof and wall assemblies, g-value, thermal bridge assessment at the abutment.
6. Structural sealant assessment where SSG is used, with bite sizing and adhesion data.
7. Drainage detail: gutter capacity, overflow path, and the interface with the host building's weatherproofing.
8. Ventilation strategy: opening area, roof vents or mechanical extract, and any RS485/KNX automation used to drive them.
9. Fire classification where required by the local code, per EN 13501 or the applicable national document.
10. Material declarations: 6063-T5/T6 alloy and temper, profile wall thickness (1.4-5.0 mm), hardware grade (SUS304/316 in coastal sites), EPDM gasket specification.

Manufacturing and Verification Chain

2026 Indicative FOB Prices for Sunroom Systems

Prices are indicative 2026 factory FOB ranges for project volumes, excluding freight, foundation work and installation. Final quotation depends on plan geometry and roof form, span and load case, glass build including laminated inner ply, thermal break continuity, opening types, finish, and the documentation package required. Contact Rogenilan Windows Doors for a specification-matched quote.

Sunroom Compliance FAQ

Which single standard should a sunroom be certified to?

There is not one. A sunroom needs a structural declaration for the frame, a roof glazing specification satisfying overhead glazing rules, a test report for the vertical openings under AS2047 or EN 14351-1, and a thermal declaration for both assemblies. Any supplier offering a single certificate for the whole product has covered one of these four and left the rest open.

Why does the roof glass cost more than the wall glass?

Because the roof unit must remain supported after breakage. That normally means a laminated inner ply, and where the outer ply is tempered, heat-soak treatment to reduce delayed spontaneous breakage. The wall unit does not carry the same post-breakage obligation, so its build can be simpler. The price difference is a direct consequence of the requirement, not of markup.

Can a sunroom roof be walked on for cleaning?

Only if it was designed for it. An imposed access load is a separate load case with its own deflection limit, and most residential glazed roofs are not designed for it. If cleaning access is needed, the design must include it from the start, or an access system must be provided that does not load the glass.

What makes a sunroom too hot or too cold in practice?

Usually three things: a g-value chosen without a shading or ventilation strategy, a Uw quoted for the glass instead of for the assembly, and a thermal break that runs through the wall frames but not the roof beams. Each is fixable at design stage and essentially unfixable afterwards.

Does the abutment to the existing building need its own detail?

Yes, and it is the highest-risk junction in the whole project. It must handle water run-off from the host roof, allow for thermal movement in the aluminium, avoid a linear thermal bridge, and transfer wind uplift into the existing structure. A generic flashing detail applied without these checks is where most sunroom leaks and most condensation complaints originate.