St Louis Roofing: Article About Underlayment Deterioration Considerations
Every rooftop takes the brunt of all local weather events, from driving rain to snowy conditions. When shingles remain serviced and intact, the structure enjoys leak protection throughout any season. However, missing or damaged shingles exposes the underlayment below. This material isn't meant to be exposed for long periods on the rooftop, making accelerated deterioration an issue. St Louis roofing professionals must repair this area before the underlayment declines any further.
Although the rooftop is built to deal with pouring rain, adding in strong wind gusts can damage the surface. If rain and winds come in from a horizontal angle, the forces can pull up underlayment and shingles. Water quickly seeps to the roof sheathing, saturating the wood and starting the deterioration process. Contractors combat these forces by adding plastic windstrips to underlayment edges. Only extremely powerful winds can pull these strips up and damage the rooftop.
Improper installation can also accelerate underlayment deterioration. Although thin, 15 pound underlayment is perfectly suited for budget friendly installations, inexperienced roofers might tear it with their shoes as they walk across the surface. Always look for experienced roofers who understand when they can walk on a surface.
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Some underlayment types can withstand walking, but 15 pound products aren't meant to stand up against heavyset shoes.
If roofers don't use the right fasteners, they could easily damage the underlayment before the shingles are even installed. Homeowners should be present during the installation to observe for themselves whether the roofers thoroughly staple the underlayment down. Staples have narrow puncture sites, allowing the materials to adhere around the fasteners for a water resistant surface. Large nails or other fasteners simply break through the underlayment. Fissures may emanate from the fasteners' positions, creating leaks.
Underlayment can be installed perfectly, but shingle damage above could leave it exposed to sunlight. All underlayment can withstand a short period in the sunlight without leaks damaging the interior, but roofers must repair these areas as soon as possible. Sunlight carries ultraviolet radiation, which can break underlayment down within days or weeks. Only shingles are designed to withstand the sun's hot radiation. Leaving the underlayment exposed only forms a perfect location for leaks into the attic.
From poor installation techniques to extreme weather, underlayment deterioration must be fought with regular service calls. Roofing professionals examine the rooftop at least once a year, allowing them to repair or replace any bad materials. If homeowners hire roofers both before and after the winter season, underlayment and other materials can be preserved for optimal structural protection.