Secondary glazing: which surfaces need cleaning?

Begin with the two systems

Secondary glazing creates a more detailed cleaning question than a single room-side pane. There is the original window and the additional unit inside it. A request to clean “the inside windows” can therefore leave uncertainty about which surfaces are intended. Start by naming the two systems, then describe the faces you want considered. You do not need specialist terminology to explain that one window sits in front of another.

The important practical issue is how the relevant surfaces can be accessed. Selectaglaze's secondary-glazing guidance discusses opening requirements and obstructions such as window dressings. Your existing product's operating information is the right reference for its mechanism. Do not assume a sliding, hinged or removable unit should be handled in the same way as a different design.

Make a surface map in plain language

Describe the room-facing surface of the secondary glazing, the face towards the original window and the original window's inner surface separately where relevant. State whether the original window's outside face is also wanted. This is a request for a defined set of surfaces, not an instruction to dismantle a unit in order to reach them. Ask what can be included once the system and access are understood.

A short list might read: “Living-room secondary unit, room-side face; other faces to discuss because the unit's opening arrangement is uncertain.” That is clearer than promising all surfaces are accessible. If you already have an operating manual, share the relevant product identification. If you do not, the installer or manufacturer may be able to help identify the unit before any unusual handling is agreed.

Mention the room arrangements that matter

Curtains, blinds, furniture and deep reveals may affect the approach to the secondary unit. Describe a fixed obstruction or an item that cannot be moved normally. Do not assume the cleaner will remove a blind, lift a heavy panel or relocate furniture as part of a routine internal appointment. Those actions need their own agreement, and some may belong with another person or service.

• Identify the rooms and the secondary units involved.
• Say which glass faces you want included.
• Provide any known product or operating information.
• Mention locks, restrictors or parts you do not normally operate.
• Explain fixed obstructions and known condition concerns.
• Ask how inaccessible or uncertain faces will be treated in the scope.

Use a hypothetical enquiry

Imagine a homeowner with an original sash window behind a sliding secondary unit. The room-side face is easy to identify, but they are unsure how to expose the remaining surfaces. Their useful message names both systems, asks for internal cleaning and flags the opening question. It does not claim that the panels can be lifted out or that the cleaner will dismantle them on arrival.

If another room has a different secondary design, mention that variation. A description that works for the living room may not apply to a bedroom unit. The purpose is not to create a technical inventory of the house; it is to avoid treating materially different mechanisms as one identical cleaning surface.

Keep maintenance questions visible

A stiff mechanism, a loose part or a damaged seal should be described as a separate concern. Cleaning is not an undertaking to repair the unit or restore its operating performance. If a panel is not opening as intended, seek the manufacturer's or installer's advice rather than forcing it so that a cleaning appointment can proceed. The agreed service can reflect the surfaces that are suitable and available.

Start with internal window cleaning for room-side work. If the original external glass is also wanted, use the inside and outside service information to keep that request explicit. The right brief identifies the systems, faces and opening uncertainty without implying that every cavity or concealed edge is included in an ordinary clean. Retain the agreed surface list so another household member can prepare the correct rooms before the appointment.

Choose your next step

View internal window cleaning options