Roof Cover Over Shingles

The second benefit is that it acts as a buffer between the metal roof and the shingle roof.

Roof cover over shingles.

Damaged shingles should be removed to check the decking for problems. Things to know about metal over shingle roof problems. Advantages of metal roofs over shingles. I have a 1949 1600 sf under roof with 8 12 pitches valleys and hips 2 6 rafters on 16 on center sheathed with 3 4 center matched lumber going over at least 1 layer of 3 tab shingles a partial tear took off the old tabs and left a nice wavy surface in pretty good shape.

Damaged decking will need to be repaired before you can install any new shingles. Install a layer of roofing felt over the roof before you begin installing the new shingles. Metal roofs over shingles will also provide an extra layer covering your home helping to further insulate it. 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.

Both metal and shingle roofs are great options for your next roofing project. Before you reshingle a roof read our step by step guide for adding new shingles over old ones. When roofing over your existing shingles can be a good idea. Although it sounds like a good idea we can assure you the cons heavily outweigh the pros.

Beveled wood pieces called horsefeathers must be laid along the thick edges of the shakes to make a fairly flat surface. Many arizona homeowners with shingle roofs do decide to roof over their existing shingles because. Step 3 cover the old shingles. 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. Over time a metal roof without a. Asphalt shingles can be laid over cedar shakes or shingles however this is a roofing project best left to pros. In fact the only pro to a shingle over is it s cheaper and cleaner.

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. Let s start with the good. If you are trying to decide between the two materials it s important to carefully look at the metal over shingle roof problems. This allows the new underlayment to act as a line of defense in the event that water somehow gets under the metal roof.

Disadvantages of metal roofs. When you should tear off your roof and start from scratch instead. After all you ll be making a significant and long term investment. 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.