Lay a course of tiles along the eaves setting the tiles at the average linear coverage.
How much overhang on roof tiles.
To create a cantilever properly you will need to know plenty about physics like torque and rotational equilibrium.
Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials.
Clay tiles 6 15 600 1 500 concrete tiles 4 10 400 1 000.
Mark the position along the eaves and top battens of every third tile.
Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood.
Ensure verge overhang is equal at left and right ends.
A typical metal roof overhang may be 2 to 4 inches or even less.
In fact in most places i was unable to get my fingers never mind my hand into the guttering to clear it.
At this stage some adjustment in shunt could be made if necessary to allow a 38 to 50mm overhang at verges.
Here phil explains how much overhang a roof should have at the gutter.
Looking right down the line of the guttering the gap between the end of the last roof tile and the outer edge of the guttering varies from around an inch and half to in some cases millimetres.
You can add 3 to 5 inches to the top.
This will keep rain away from your shed.