Install the starter hub starting at the bottom edge or gutter and nail the sheet metal firmly with the top and bottom edges facing down. The use of galvanized roof nails is mandatory. Install the second sheet so that it overlaps the bottom sheet according to the manufacturer's requirements.
You can find the best-graded timber wall frames at Heydenframeandtruss.com.au which are usually marked with different colored lines to indicate the required overlap. Notice that each layer at the bottom of the tarp has a layer of asphalt at the bottom. As the sunlight warms the leaves, this asphalt melts and closes the joints between the two leaves.
When the roof is installed in winter, timber roof builders use a flashlight to heat and close the tour. Overheating of a roof can cause the roof to melt and, in the worst case, ignite the structures underneath.
Sealing the leaves requires a little heat. This work has to be done very carefully so as not to damage it. When finished, use a sealing gun to apply the roof covering to the exposed nail head.
For larger structures, such as full-size homes, sheet timber frame roofing is used instead of fiberglass. Although initially more expensive than traditional shingles, many companies guarantee their protection for fifty years or more. Folding timber frame roofs are not usually used in private homes because they don't look as good as shingles.