AccessoriesService

Sliding doors and rolling shutters, aluminium windows, roof and wall insulation, louvers and sand trap louvers, fasteners, power and ridge ventilators, skylights and wall lights, and roof jacks and curbs where services pass through the roof. They are a small share of cost and a large share of how well the building works day to day.

Because every opening is a hole in a structural envelope. Doors, windows, louvers and roof penetrations all need framing, trimming and flashing designed around them, and cutting them afterwards compromises both the sheet and its weather performance. Late changes to openings are among the most common causes of leaks in an otherwise sound building.

A ridge ventilator runs along the roof apex and works by natural stack effect, with no running cost and nothing to fail. A power ventilator, usually a turbo or motorised unit, moves a defined volume of air and is specified where the heat or fume load exceeds what natural ventilation can clear. Most industrial buildings use a combination, sized against the internal heat load.

It follows from the internal heat load, the building volume and the air changes per hour the operation requires, not from floor area alone. As an indication, a mid-sized agro-processing shed may take 15–20 units. Sizing them properly matters, because under-ventilating a hot process building affects both product and people.

They allow ventilation air in while trapping wind-blown dust and sand, which matters on dry, exposed sites and in any process where airborne dust affects the product. They are specified in place of plain louvers where the external environment is dusty. The trade-off is a slightly reduced free area for the same opening size.

Roof and wall insulation is commonly glass wool or a comparable blanket laid under the sheeting, or a factory-bonded insulated panel where a higher performance envelope is needed. It reduces heat gain through the roof, which improves internal working conditions and cuts cooling load by an estimated 25–30% in conditioned areas. The specification should follow the internal environment the process requires.

Both are the detailing that lets something pass through or sit on the roof without leaking. A roof jack seals around a pipe or duct penetration; a roof curb provides a raised, flashed kerb for a fan, extractor or unit mounted on the roof. Using them is the difference between a penetration that lasts and one that becomes an annual maintenance item.

Self-drilling screws with bonded washers, specified for the sheet material, thickness and exposure. Fasteners are a tiny fraction of cost and a leading cause of roof leaks, because a washer that degrades or a screw that corrodes fails long before the sheet does. Coastal and chemically aggressive sites need a higher fastener specification, not just better cladding.

They are translucent panels set into the roof or wall to admit daylight, and are usually specified as a percentage of the sheeted area. They cut daytime lighting cost substantially, but too great an area increases heat gain and glare. The right proportion depends on the work being done inside and the orientation of the building.

Yes. Doors, ventilators, louvers, skylights, insulation and fasteners can be supplied on their own, which suits owners upgrading an existing shed — adding ventilation, improving daylight or replacing failed fixings. The existing sheet profile and structure need to be confirmed first, so that what is supplied actually fits what is there.