All Around Roofing: Trusted Roofers Denver CO
While many homeowners today are concerned with their home’s energy efficiency, the issue of ventilation is also important. Today’s building codes involve ventilation standards that were created more than 80 years ago while energy efficiency recommendations have been updated since the 2010s. By working with an experienced Denver roofing contractor, property owners can make sure that their homes are as well ventilated as they are efficient.
Tightly sealed houses keep the home’s air inside, including conditioned air cooled by the A/C system and warm air provided by the heating equipment. However, this means that the same old recycled air stays in the house until doors or windows are opened. Meanwhile, daily household activities like showering and cooking create humidity. This humidity, along with intake air from the soffit vents, builds up in the attic and causes problems such as wood damage. Poor ventilation within an attic may cause the roof’s wooden decking to experience delamination. When the decking delaminates, it may not be able to hold up the roof’s shingles or tiles.
Another problem caused by poor attic ventilation and high humidity levels is loss of fastening power by the screws or nails holding all of the materials together. When the fasteners are weakened, a strong gust of wind may be enough to blow off a bunch of shingles or tiles from the roof.
Loose or missing shingles can cause the roof to leak. If the wooden sheathing is saturated, then the whole rooftop needs to be replaced.
High attic humidity levels and insufficient ventilation can combine to damage the roof’s insulation. Fiberglass and loose fill or blown in insulation become saturated due to the condensation in a poorly ventilated attic. If the insulation contains any organic materials, it may begin to grow mold. This mold can have health effects on everyone living in the home. Wet or moldy insulation must be removed and the ventilation problem corrected as quickly as possible, as the fungus can easily spread to the wooden rafters, joists and trusses.
Inadequately ventilated attics also increase a home’s risk of ice dam formation. Heat leaking through the attic lets some snow and ice melt when the sun shines onto the rooftop during winter days. At night when the temperature drops, the melted water refreezes and pushes up the shingles or tiles. After a few cycles of this, an ice dam forms. The melting ice may saturate the roof’s deck and leak into the home. Undetected ice dams can ruin a roof as well as a home’s walls and ceilings.