Shingling Second Story Off A First Floor Roof

In fact the extra layer can reduce your roof s lifespan by up to 40.

Shingling second story off a first floor roof.

Roofing second layer of shingles roofing. Set the first shingle of the second row back a half tab 6 inches 17 centimeters from the edge of first shingle on the first row and so that the bottom of its tabs just touches the tops of the cutout slots on the shingle below. The flashing extends up the wall at least 4 the flashing extends onto the roof a minimum of 2 inches 4 inches is preferable in more severe climate areas. I have a two story house in new england with basically a flat back but the second story overhanging the first story by 16.

After snow melts it drips down from the roof onto the deck and freezes making an icy deck. Another issue is that when you add in the second layer it can add extra weight to your roof. This 1 2 tab has to be cut off where it hangs off the left edge of the gable roof. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. Apply the starter shingle so that the top edge butts up against the bottom edge of the 2nd row of shingles and the bottom edge is flush with the edge of the roof. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. The second layer of shingles will trap heat which can result in the decomposition of both roof layers.

The flashing needs to be installed before installing the roof shingles. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. I m looking for a maintenance free solution to the icy. This will force you to replace your roof earlier than expected.

Lay the second row of shingles. The metal flashing is formed with a hook edge and cleated on 12 centers. There is a doorway to the deck in the middle of the back of the house. For a second layer to be as good as a roof tear off you would have to have sound decking no leaks and a roof with no sidewalls where flashing is needed in order to tie the tiles in to the exterior walls.

Apply this starter shingle along the entire length of the lowest edge of all roof planes. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of roofing installed.