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Box Profile vs Corrugated Wall Cladding

Both profiles clad walls perfectly well, and the choice usually comes down to appearance, the spacing of the rails behind, and what the building sits next to. Here is how they differ in practice. Appearance Box profile reads as a series of crisp, straight-edged ribs...

How to Choose the Right Size Z Purlin for Your Roof

Purlins are the horizontal members that carry the roof sheets and transfer their load into the main frame. Choosing a size is a structural decision, and while this article explains what drives it, the final selection should be made or checked by someone competent to...

Choosing the Right Steel Guttering System

Guttering is usually the last thing specified on a steel roof and the first thing to cause trouble. An undersized or badly positioned system will overflow in heavy rain regardless of how well the roof itself is detailed. Start with the area draining to it The...

Barn Roofing Solutions for Overheating

A single skin steel roof over a large open building gets hot. On a clear summer day the underside of the sheet can be considerably warmer than the outside air, and in a livestock building that heat has consequences for welfare as well as comfort. Why it happens Steel...

Cut Edge Corrosion on Metal Roofing

Cut Edge Corrosion on Metal Roofing

Cut edge corrosion is one of the most common reasons an otherwise sound industrial roof starts to look tired. It begins at the exposed edge of a sheet, works its way back under the coating, and eventually lifts the paint film away from the steel. Why edges are...

Using Corrugated Steel Sheets on Curved Roofs

Using Corrugated Steel Sheets on Curved Roofs

Curved roofs turn up more often than you might expect: Dutch barns, older agricultural buildings, bandstands, canopies and a fair number of architectural projects. Profiled steel can follow a curve, but how well depends a great deal on which profile you choose. Why...

Installing Steel Roof Sheets Over Tiles

Installing Steel Roof Sheets Over Tiles

Overlaying a tiled roof with steel sheets is asked about regularly, usually because stripping and disposing of the existing covering is the expensive part of the job. It can be done, but it is not simply a matter of screwing sheets over what is already there, and on...

Underlay for Box Profile Roofing Sheets

Underlay for Box Profile Roofing Sheets

Whether box profile sheets need an underlay depends almost entirely on what the building is for. There is no single right answer, and specifying a membrane you do not need adds cost and an extra layer to get wrong. What an underlay is actually for A membrane beneath...