Metal roof purlins are installed horizontally under metal roofs.
How to shape purlin for corrugated roof.
In order for the sheets to be easily fixed to the purlins as a rough guide they should be at least 50mm wide.
The overlaps ends and sides depends upon the sloop of the roof.
In corrugated sheets the corrugations shall be uniform in depth and pitch and parallel with the side.
They are installed on top of the roof rafters with a felt underlayment or vapor barrier installed on top.
Apply front and back panels similarly to side walls.
The flashing should overlap the edge of the roof by one inch to help direct water.
Install vent as close to roof peak as possible.
The g s sheets shall be fixed to the purlins or other roof members such as hip or valley rafters etc.
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.
To install corrugated roofing start by cutting your panels to length with an angle grinder.
With galvanized j or l hook.
Setting corrugated metal roof purlin spacing in a proper distance is an important part of the entire process.
Cut to fit pitch of roof and around vent.
Corrugated sheet roofing material is widely available and easy to use.
How to install purlins.
0 6 mm or 0 8 mm thick as given in the description of the item and shall be appropriately bent in shape.
It helps direct water away from the meeting points and keeps the roofing dry.
Next pre drill holes on the end and side ridges of the panels spacing the holes 6 to 8 inches apart.
Beginning at the outside edge of your roof place each panel directly onto the purlins that are attached to the roof trusses.
Overlap roof panels one corrugation away from prevailing wind and nail to rafters starting from one end.
Corrugated sheet roofing.
Adjust door construction to desired size.
The distance lengths are often based on the roofing panels size.
Proper spacing will offer attachment security that resulted in optimal stability.
They give added support to the roof and also provide a nailing surface for the end panels and drip edge.
Purlins are 2 by 4 feet and are installed much like metal roofing.
However if your metal roof has another supporting method the exact spacing is not.
