Glass or polycarbonate? Identify conservatory roof panels

Use records before visual guesses

If you are unsure what your conservatory roof is made from, start with the paperwork rather than a cleaning experiment. An invoice, installation booklet, replacement record or manufacturer reference may identify the panel product. A tinted or textured appearance alone should not be treated as a complete material specification. Tell the cleaner what is known and what remains uncertain.

There is no need to climb onto the conservatory, remove a trim or reach an awkward label to establish the material for a first enquiry. If records are unavailable, ask the installer or explain the uncertainty through the conservatory cleaning service. The next step can be considered without pretending the roof is ordinary glass because that seems the simplest description.

Why the product information changes the question

Manufacturers publish different care instructions for different surfaces. Brett Martin's Marlon ST guidance, for example, cautions against abrasive or highly alkaline cleaners and sharp instruments on that polycarbonate product. This is a reason to identify and follow the actual product guidance, not a universal cleaning recipe for every plastic roof or a claim that every translucent panel is Marlon ST.

Known glass coatings also need their own information. A coated pane, an applied film and a structured plastic sheet should not be grouped together simply because all appear within a conservatory roof. If the roof has had partial replacements, mention that some panels may differ from the others. A single product name may no longer describe the whole assembly.

Build a small product record

Write down the details you can obtain without intrusive investigation. Keep the name of the product, the source of the information and the roof area it relates to. “Installer invoice identifies the replacement panels on the rear slope” is more precise than “the conservatory is this brand”. Save the document or reference so the information remains usable for future maintenance.

• What document or person identified the material?
• Which panels or roof sections does that information cover?
• Is a coating, tint or applied treatment specified?
• Have any panels been replaced separately?
• Are care instructions or warranty details available?
• Is there a known defect or leak being assessed elsewhere?

The list is a way to organise existing knowledge. It is not a requirement to produce complete records before contacting the business. An enquiry can simply state that the material is unknown and ask what information would help establish the appropriate next step. Keep replacement-panel references attached to their location, not just the address.

Describe the mark independently of the material

Once you have the product details, keep the appearance concern separate. Say whether there are scattered spots, a darker band, visible debris or an internal-looking patch. Do not assume that a mark is on the external surface or that product identification makes every deposit removable. Its location, history and condition still matter.

A hypothetical owner might have paperwork confirming some polycarbonate panels and notice a cloudy-looking section of uncertain location. The useful enquiry shares both facts. It does not promise the cloudiness is surface dirt or ask for a glass scraper because the word “window” appears in the service name. Cleaning and repair expectations should follow assessment of the actual surface.

Access remains a separate decision

Knowing the material does not establish a safe working position. Explain the conservatory's surroundings, fixed obstacles and which side can be approached. Do not use the roof as a platform or assume a care instruction authorises elevated access at your property. Product suitability and access suitability are related questions, but neither answers the other automatically.

If vertical glass or internal windows are wanted as well, identify them separately through internal window cleaning or the conservatory enquiry. The final brief should name the product where known, the surfaces requested and the important uncertainties. That gives the cleaning discussion a reliable starting point without turning the homeowner into a material tester or roof inspector.

Choose your next step

Ask about exterior cleaning