New Roof Or Second Layer Of Shingles

Make repairs before.

New roof or second layer of shingles.

How to put on a second layer of shingles evaluate the job. Use 1 5 or 1 75 inch roofing nails. In fact the extra layer can reduce your roof s lifespan by up to 40. Doing a second layer right means a lot of prep work goes into the overlay anyway and flashing which remember is the most vulnerable point on your roof is harder to guarantee.

A new roof fixes existing issues and traps less heat than multiple layers which can cause shingles to break and curl faster. When it s time to replace the roof again and you have no choice but to start anew two layers is the maximum allowed in most areas you ll have to pay extra for the two layer tearoff and disposal. Most people would limit this practice to a total of two layers of shingles. When you factor in rain or snow it will add even more weight.

Flashing around roof penetrations and sidewalls can be compromised. The standard practice was that you could install a new layer of singles directly over the old layer during a re roof. Examine the existing roof. Any more than that and you d have to tear off the old shingles before installing a new layer.

Another issue is that when you add in the second layer it can add extra weight to your roof. Place the top of each starter shingle firmly against the bottom of the shingle immediately above it and even with the eaves then nail it into place. Roofing second layer of shingles roofing. That in itself eats away at the savings.

Before you add shingles over shingles you need to look at the existing roof to make sure. The savings you re going to see may be in the range of a modest 25. That second layer of shingles won t last as long. This will force you to replace your roof earlier than expected.

How to shingle over existing shingles and how to shingle a roof how to install roof shingles shingle layout lines h. If a shingle is torn or cracked glue the broken piece back in place using roofing cement. The second layer is also more difficult to install properly compared to new shingles. Eliminating the tearoff can easily save 1 000 or more on a new roof but you re really just delaying the cost.

Plus depending upon the size of your roof you ve added multiple tons of weight which could pose a big problem if there is significant snow accumulation. The goal is to provide a reasonably flat surface for the new shingles to lie over with no gaps greater than 1 2 inch. Before you start hefting shingles to the roof consider whether or not the project is worth doing. If the broken piece is lost cut a new piece to fit the existing shingle.