Roof Dry Rot - What Is It And How To Prevent It

Posted on: 2 September 2018

The shingles may look like they're in great shape; unfortunately, that doesn't mean that there isn't a problem that you can't see. The average homeowner doesn't climb up onto their roof, so discovering wood rot often goes unnoticed until there are professional roofing inspections done or if there is sagging or other noticeable problems. To ensure you get the maximum life from your roof as well as the structure of your home, it is important to understand what dry rot is, the cause, and the prevention.

What Is Dry Rot & What Causes it?

Dry rot occurs when wood is invaded with fungal spores. Dry rot is a common type of wood rot that is not caused by water damage, but a lack of ventilation. It most commonly occurs in wood decking that is below the shingles and the tar covering. Without proper ventilation, moisture is drained from the wood and between the lack of moisture and fungi feasting on the wood, the roof will eventually begin to sag, and the roof shingles will become brittle.

Where Is Dry Rot Found?

When it comes to the roof, dry wood is typically found in the supporting plywood (decking); however, it can also be found in the roof framing, the fascia (trim that the gutters are often attached to) and the rake boards (the trim on the gable end of the roof). The best way to determine to extent of the rot is through roof inspections by a roofing contractor. The contractor can also check for wood rot in areas, such as the exterior window sills and door casings.

How to Prevent Dry Rot

One of the most common causes of excessive dry rot damage is due to clogged gutters. When the gutters are clogged, the water backs up, saturating the wood. Without the excess moisture, there is less risk of fungi and less risk of the wood rotting. The best way to prevent dry rot is regularly clean the gutters and ensure the gutter system is in good working order. The next step to prevention is to install roof ventilation. An appropriate roof vent will help to expel the moisture and protect it from dry rot.

When dry rot is left untreated, and under the right conditions it can spread and eventually weaken the entire structure of your home. It is essential that routine maintenance is done on the roofing system, which includes regular inspections, making repairs as needed and ensuring all ventilation systems are working correctly.

For more information, contact a company like Par One Construction, Inc.