How To Install Roof Shingles Over Old Shingles

Use a starter strip or cut pieces for a starter course.

How to install roof shingles over old shingles.

Damaged shingles should be removed to check the decking for problems. Mark 12 inches up on the roof for the first course of shingles then mark every 5 inches all the way up the roof to set your reveal. Around an inch should do. Watch and see how easy it is.

Do this on both sides of the roof. To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below. Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in. Many roofers recommend using laminated or dimensional shingles for re roofs because they re thicker than.

Shingling a shed and want some tips. All shingle manufacturers honor the warranty whether their products are used for a reroof or a new roof. Leave the old valley flashing in place and install new over it. Damaged decking will need to be repaired before you can install any new shingles.

Handy home shows you universal shingling techniques that can be applied to any shed. Do both sides first and then install ridge cap shingles over the top. Each shingle will require around 4 nails underneath the tar line and about half an inch under where the next shingle will overlap. Rip cut the starter strip or starter pieces so that they butt up against the second course of existing shingles and are even with the front edge of the existing roofing.

Attach with nails along the top edge of the strip. Step 3 cover the old shingles. The first row of shingles should overhang the drip edge of the roof. The felt should be secured every six inches with nails or staples.

Re roofers have tricks to lay new roof shingles over old so that the same step ups between courses are maintained but if any old shingles are cupped curled or otherwise misshapen those defects will telegraph through to the new layer.