How To Shape Purlin For Corrugated Roof

In corrugated sheets the corrugations shall be uniform in depth and pitch and parallel with the side.

How to shape purlin for corrugated roof.

Adjust door construction to desired size. Purlins are 2 by 4 feet and are installed much like metal roofing. The overlaps ends and sides depends upon the sloop of the roof. Beginning at the outside edge of your roof place each panel directly onto the purlins that are attached to the roof trusses.

The g s sheets shall be fixed to the purlins or other roof members such as hip or valley rafters etc. Corrugated sheet roofing material is widely available and easy to use. Bend the flashing into a v shape to fit over the top roof ridge and the corners where the panels meet. 0 6 mm or 0 8 mm thick as given in the description of the item and shall be appropriately bent in shape.

They give added support to the roof and also provide a nailing surface for the end panels and drip edge. In order for the sheets to be easily fixed to the purlins as a rough guide they should be at least 50mm wide. When positioned roof purlins should be spaced no further than 1 2 metres apart when using sheeting with a thickness of 0 7mm and 1 metre when using 0 5mm sheeting. Install vent as close to roof peak as possible.

Next pre drill holes on the end and side ridges of the panels spacing the holes 6 to 8 inches apart. Proper spacing will offer attachment security that resulted in optimal stability. How to install purlins. The flashing should overlap the edge of the roof by one inch to help direct water.

Cut to fit pitch of roof and around vent. To install corrugated roofing start by cutting your panels to length with an angle grinder. With galvanized j or l hook. It helps direct water away from the meeting points and keeps the roofing dry.

Flashing is metal trim that fits over joints where two sections of roof meet. Overlap roof panels one corrugation away from prevailing wind and nail to rafters starting from one end. Corrugations should run in a straight line between the highest and lowest points and at a right angle to the purlins the intermediate supports. Apply front and back panels similarly to side walls.

They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top. Setting corrugated metal roof purlin spacing in a proper distance is an important part of the entire process. Metal roof purlins are installed horizontally under metal roofs.