Lower than the purlin along the house 12 x 1 4 3.
How to install tin roof under deck.
For an r panel style you will need to install it with 5 16 inch lap screws.
Place the first screw.
If the span under your deck is 12 ft for example the purlin at the outer end of the deck should be 3 in.
How to build a tin roof over a deck step 1.
For example assume the porch measures.
Step 2 take measurements.
Install the purlin along the house and the outer purlin.
Mark the porch with a line parallel to the edge farthest from the house.
Mark the line 2 inches in from the.
Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof.
First mark all the purlin locations on the deck joists.
However with a seamed or crimped roof style you won t need screws.
Step 1 select a tin roof type.
Measure the porch to find the best length and width for a tin porch roof.
Secure it in the same manner as the first.
Then stretch a string between them.
Position the next panel further from the house but overlapping the first by at least 6 inches.
Decide what type of tin roof you want by selecting either an r panel or v crimp style.