Shingling Second Story Off A First Floor Roof

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.

Shingling second story off a first floor roof.

The flashing needs to be installed before installing the roof shingles. 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. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. Roofing second layer of shingles roofing.

The metal flashing is formed with a hook edge and cleated on 12 centers. If you don t tear off the old layer you can t examine the decking. I have a two story house in new england with basically a flat back but the second story overhanging the first story by 16. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.

Lay the second row of shingles. In fact the extra layer can reduce your roof s lifespan by up to 40. How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. Good quality composite shingles can weigh 350 to 450 pounds per square 100 square feet of roofing installed.

This 1 2 tab has to be cut off where it hangs off the left edge of the gable roof. There is a doorway to the deck in the middle of the back of the house. Chances are your roof structure was designed for a dead load of one layer of shingles plus extra for snow and a safety margin. The second layer of shingles will trap heat which can result in the decomposition of both roof layers.

The goal is to create a level surface for the first course of new shingles. After snow melts it drips down from the roof onto the deck and freezes making an icy deck. 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. Apply this starter shingle along the entire length of the lowest edge of all roof planes.

This will force you to replace your roof earlier than expected. Another issue is that when you add in the second layer it can add extra weight to your roof.