When replacing your roof, it’s very easy to get caught up in shingle color and brand. Before you rush into that, make sure your contractor is not skimping on the underlayment. Not all underlayment is created equal. Not all contractors install underlayment in the same locations.
Carlson Exteriors uses Winterguard, CertainTeed’s brand of ice and water barrier. Per city code this barrier is placed at all valleys and at the eaves. However, there are locations this barrier should be applied that are not required by city code. These locations are all roof penetrations (such as vents or furnace flues), around chimneys, skylights, and anywhere a roof line meets a siding wall. These joining areas are first susceptible to leaks if your home is not sealed correctly by using a ice and water barrier. Many manufacturers require these additional areas to have an ice and water barrier applied to qualify for the roof or shingle warranty.
Make sure your contractor is not using a 15lb or 30lb felt. This used to be contractor’s only option but the roofing industry has evolved into synthetic felts. The old felt would tear easily and gave no traction to installers. If your home has the old felt under your shingles, if any shingles would blow off your flimsy felt would be left exposed. If exposed for too long, it will rip leaving your OSB to fend for itself. Synthetic felt eliminates this problem. Synthetic felt is extremely durable and resistant to ripping or tearing. Installers also prefer it when installing because it’s easier to work on.
When you meet with a contractor, remember more than the shingles are working to protect your home from roof leaks or ice dams. The whole roofing system, combined together, protects your home.
One response to “Understanding Roof Underlayment”
[…] Synthetic felt has grown with popularity amongst roofing companies. It’s easier/safer for crews to walk on and it has a higher resistance to ripping in the wind. Regular 15lb or 30lb felt rips very easy in the hands, while synthetic felt is practically impossible to rip. Some shingle manufacturers require synthetic felt to qualify for warranties. Carlson Exteriors only uses synthetic felt. Click here to read more about synthetic felt. […]