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