Question 1

Where do most roof leaks occur?

Accepted Answer

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Most roof leaks occur where shingles meet or where there are sealants or seams in the materials. This is common around skylights and at any point there is a break in the roof such as corners and edges. Roofing materials are incredibly strong and resistant when overlapping, but any change in that can cause gaps where water can enter.

Question 2

How waterproof is roof underlayment?

Accepted Answer

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The level of underlayment’s water resistance will depend on the type of underlayment. The most popular underlayment, felt, is water-resistant, but it can’t withstand long direct exposure to rain or the elements.

Synthetic underlayment is more waterproof, but asphalt is the only fully waterproof type of underlayment.

Question 3

Will adding a skylight void my roof's warranty?

Accepted Answer

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An improperly installed skylight could potentially impact your roof's warranty. This happens because roofing penetration is necessary during skylight installation. Check your warranty information to verify. In most cases, having skylights professionally installed with proof that flashing is being done to specifications can be enough to preserve your roof's warranty.

Question 4

Does a capped chimney need to be vented?

Accepted Answer

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Yes, capped chimneys should still be vented. Failing to vent a chimney will result in condensation buildup inside the chimney, which commonly results in mold growth. If mold begins to grow in a chimney, it frequently goes undetected and spreads quickly through the home. Mold and moisture can damage the structural integrity of your home, and exposure to mold can cause discomfort and illness in residents.

Question 5

What is the life expectancy of roof underlayment?

Accepted Answer

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Roof underlayment usually lasts as long as the roofing material that covers it, as it’s not directly exposed to the elements. In most cases, roofing companies will replace the underlayment each time they install a new roof. In some cases, particularly with slate, clay, or certain metal roofs that can last 50 to 100 years, your underlayment may require replacement within that timeframe, especially if you start to notice roof leaks.