Handling and Storage
To ensure the durability of the zinc building materials, Umicore recommends specific procedures that must be followed in the handling and storage of zinc sheets and zinc coils.
Avoid dropping the zinc sheets, coils, or formed pieces. Any blow, punch, or deformity to the zinc can cause folds or bumps in one or several parts of the sheets or coils. These deformities will damage the zinc's appearance and may also damage the zinc's structural integrity. Cracks may occur in these damaged places over time. Avoid dragging or sliding the sheets, coils, or formed pieces over rough surfaces. The rough surfaces may scratch or damage the zinc, which will develop into cracks either during forming or after installation, due to the effects of expansion and contraction of the metal. Ensure that the zinc is not handled in an area with great temperature variations.
Temperature variations can cause condensation build-up, that in turn will cause zinc hydroxide (white rust) to form on the zinc. When handling the zinc, always wear gloves and a long-sleeved shirt. The acidic nature of perspiration will leave marks on the zinc surface that will heal over time but will remain visible for a while and could have an adverse effect on the appearance of the zinc.
The zinc sheets, coils, and formed pieces must be stored in a well ventilated, sheltered, and dry area. The temperature variation should be kept to a minimum to avoid condensation build-up. The sheets, coils, and formed pieces should be separated from the ground (by pallet or another similar product) to allow sufficient air space for correct ventilation of the zinc. The pallets (or similar storage device) should allow the zinc sheets to be stored flat to reduce the risk of deformation.
When the zinc is shipped in containers, it is essential to ventilate the containers immediately upon receipt and store the products as soon as possible in the correct conditions.
When coils are shipped, they may be placed either on their horizontal axis or vertical axis, depending on the client’s request. It is recommended that the coils be stored in their original packaging. If coils are to be stacked due to lack of storage space, the following recommendations must be respected:
- If the coils are delivered on their horizontal axis (eye to the side), the pallets must be stored in their original packaging, and preferably individually on separated racks.
- If the coils are delivered on their vertical axis (eye to the sky), the pallets may be stored on top of one another, up to a maximum of four pallets for reasons of stability.
The Protective Film:
The protective film should be removed from zinc panels upon completion of an elevation, all at the same time. The protective film should remain on the zinc no longer than 60 days after the completion of installation. Make sure that other trades will not contaminate zinc panels after the film is removed.