Install the purlin along the house and the outer purlin.
How to install tin roof under deck.
For example assume the porch measures.
If the span under your deck is 12 ft for example the purlin at the outer end of the deck should be 3 in.
Mark the porch with a line parallel to the edge farthest from the house.
Install the roofing screws vertically along each rib in the panel.
Be sure the larger edge is laid so that the small edge of the next panel will overlap it.
Step 2 take measurements.
How to build a tin roof over a deck step 1.
Then stretch a string between them.
Install subsequent rows of panels working your way to the downwind side of the deck s lower surface until finished.
For an r panel style you will need to install it with 5 16 inch lap screws.
Decide what type of tin roof you want by selecting either an r panel or v crimp style.
Place the first screw.
Lower than the purlin along the house 12 x 1 4 3.
Position the next panel further from the house but overlapping the first by at least 6 inches.
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.
However with a seamed or crimped roof style you won t need screws.
First mark all the purlin locations on the deck joists.
Mark the line 2 inches in from the.