Re-roofing over an existing layer of composition shingles, while generally permitted by code, reduces the ability of the newer shingles to resist impact damage from .

It should be noted that Re-roofing over an existing layer of composition shingles, while generally permitted by code, reduces the ability of the newer shingles to resist impact damage from hail.

According to the question, we are to discuss the Re-roofing over an existing layer of composition shingles.

As a result of this we can see that this Re-roofing brings about reduction in the ability of the newer shingles, i e their capability to impose a damage

Therefore, Re-roofing over an existing layer of composition shingles reduces the ability of the newer shingles to resist impact damage from hail.

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The available options are:

A. hail

B. UV rays

C. water

hail

Explanation:

In roofing construction works, Shingle is a form of roofing materials that are designed to cover the roof of a building and generally, resist other atmospheric components from entering the building.

However, in this case, and considering the available options, in a situation whereby re-roofing is carried out over an existing layer of composition shingles, even though, it is generally permitted by code, it reduces the ability of the newer shingles to resist impact damage from Hail.

Hence, the correct answer is option A. which is HAIL.

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