Roof Cover Over Shingles

Because asphalt shingles are routinely exposed 5 in rip down the first strip the starter course so that it is 5 in.

Roof cover over shingles. When roofing over your existing shingles can be a good idea. Both metal and shingle roofs are great options for your next roofing project. Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros.

When contemplating a new roof many people hope to simply do a shingle over and avoid the extra cost and mess of tearing off the existing roof and starting from scratch. After all you ll be making a significant and long term investment. Over time a metal roof without a. Before you reshingle a roof read our step by step guide for adding new shingles over old ones.

Step 3 cover the old shingles. Damaged decking will need to be repaired before you can install any new shingles. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros. To level out an existing asphalt shingle roof rip down reduce the height of two courses of shingles as shown in the drawing below.

The first is running new underlayment over an existing shingle roof thus covering the old roof. The second benefit is that it acts as a buffer between the metal roof and the shingle roof. Leave the old valley flashing in place and install new over it. It s clearly easier and cheaper to leave the old shingles in place but there s some special prep work involved with a re roof removing vents ridge caps and misshapen shingles among other things and you still have to replace or add new flashing which sometimes can be tricky over old roofing.

Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because. Things to know about metal over shingle roof problems. By placing metal roofing over shingles you can save in the labor costs of ripping them off while also preventing them from being thrown into landfills. When you should tear off your roof and start from scratch instead.

Damaged shingles should be removed to check the decking for problems. In fact the only pro to a shingle over is it s cheaper and cleaner. Disadvantages of metal roofs. Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface.

This allows the new underlayment to act as a line of defense in the event that water somehow gets under the metal roof. Why installing new shingles over old shingles can be good. Advantages of metal roofs over shingles. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems.

Let s start with the good.