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A serving hatch can shorten the distance between a café kitchen and its customers, but the useful opening depends on more than the width written on a drawing. The operator needs to reach the handle, move a tray through the opening and close the window after service. For a contractor or purchasing team, those everyday movements provide a practical starting point for specifying the 70 Gas Strut Window.

This model is presented as a gas-strut-assisted pass-through window for spaces such as kitchens and cafés, with a thermal-break aluminium frame and an opening described as reaching 90 degrees. It is a candidate for a counter connection where an upward-opening sash suits the layout. Before requesting a price, put the counter, surrounding wall and intended service arrangement into one drawing so the supplier can assess the whole opening.

Draw the service position before choosing the window size

Begin with the people using the hatch. Mark where the staff member stands, where a customer waits and where a finished drink or tray rests. Include the depth of the counter on both sides of the wall. A wide window above a deep worktop can still leave the handle awkward to reach. A simple full-size mock-up using a table and a taped outline can reveal that problem before dimensions become an order.

Record the finished floor and counter levels as well as the structural opening. Distinguish the opening in the wall from the required finished frame size; the installer and supplier need to agree the fitting allowance. Add wall thickness, interior finishes and exterior cladding to the section drawing. These details help prevent a quotation based on a clear opening that later becomes smaller once the actual junctions are designed.

Check the space occupied by the open sash

The opening angle is only part of the clearance question. Ask for a drawing showing the complete sash movement and its final open position at the proposed dimensions. Compare that envelope with signs, lighting, canopies and any nearby walkway. If the design includes stools beneath the opening, show their position too. The available space needs to work during opening and closing, as well as when the sash is fully raised.

The gas struts also deserve a specific discussion. Their suitability depends on the sash and glazing arrangement, so request confirmation for the exact configuration being quoted. Ask how the handle is operated from the staff position and what routine closing procedure is expected. For a busy counter, a sample demonstration or a video of the proposed operation is more useful than assuming that every size feels the same in use.

Resolve the sill and counter junction together

The product offers sill and no-sill choices, with the no-sill option carrying a caution about possible light leakage. That makes the bottom detail a procurement decision, rather than a cosmetic preference. Send a section through the worktop edge and ask how the chosen arrangement closes against it. Clarify which parts belong to the window supply and which must be fabricated or finished by the counter contractor.

A continuous-looking counter should also be considered alongside cleaning and exposure. Ask the project designer and installer to resolve the exterior junction, drainage route and sealing detail for the actual location. Request the relevant performance information for the proposed assembly where the project requires it. The words “thermal break” describe a frame feature; they do not, by themselves, establish the performance of every size, glass choice and installed junction.

Make screens, locks and cleaning access part of the order

Retractable or roll-down screens are listed as options. If a screen is wanted, ask where its housing and guides sit and how it changes the usable pass-through space. Show how staff will hand items across when the screen is in use. Including that requirement early allows the supplier to propose a coordinated arrangement, while the operator can decide whether it fits the intended service routine.

The listing also includes multipoint locking. Request the handle and lock arrangement on the approval drawing, including the position from which staff operate it. Plan access to the glazing and frame for cleaning, and ask which maintenance tasks apply to the struts, hinges and locks. Keep replacement hardware references with the handover information so a future service request can identify the installed configuration without relying on a photograph alone.

Send a quotation package that reflects the actual café

A useful enquiry brings together the opening schedule, a dimensioned section, the counter layout and photographs of the location. Add the desired finish, glazing requirement, screen preference and chosen sill approach. Ask the supplier to return a marked drawing and a clear supply scope with the quotation. Delivery arrangements, installation responsibilities and the approval process can then be discussed against the same physical design.

If the raised sash cannot fit comfortably within the available space, revisit the opening method before committing to fabrication. The wider aluminium window collection provides other starting points for that discussion. For the gas strut option, the strongest purchasing decision is one the operator can recognise in use: an accessible handle, a workable handover opening and a closing detail that has been agreed with the people building the counter.