Once you have these things, you should select the type of tin roof that you want. There are two main types that you can choose: an R-panel or V-crimp style. The difference between the two is that an R-panel requires you to use 5/16 inch lap screws while a V-crimp doesn’t use screws.
For you to make the decision you need to consult your roofer. You can also make the decision depending on your budget.
After making the decision you should measure the length and width of your roof so that you are able to determine the amount of edging needed. When taking the measurements you should add two to four inches for the overhang. If you need to deflect rainwater, you should add a slightly larger overhang at the door.
Before you install the tin roof you should remove all of your old shingles. Once you have removed all of the old shingles you should now lay you first piece of tin roofing.
For ideal results you should position the roofing so that it overhangs the edge at least four inches. You should then hold the sheet in place using 1 ½ inch wood screws. You should tighten the screws enough to hold the panel in place, but not enough to create dimples in the tins.
Once the first sheet is in place, you should add the second sheet. To prevent leaks you should ensure that the second sheet overlaps the first sheet. You should continue adding the panels until you complete the first row. When you reach the last panel you should cut it to fit the edge using a jig saw.
After doing this you should now start the second row. To waterproof the roof you should ensure that the second row starts above the last panel of the first row.