Roofing underlayment is the unseen hero of every well-built roof. Installed between the roof decking and the shingles, underlayment is your last line of defense if water ever gets beneath the outer roofing layer. In Longmont, Colorado’s demanding climate, the right underlayment choice matters enormously.
Types of Roofing Underlayment We Use in Longmont
- Synthetic underlayment — our standard for most Longmont installations; tear-resistant, UV-stable, slip-resistant for crew safety
- Self-adhering ice and water shield — required at eaves, valleys, and around penetrations in Colorado; provides critical protection against ice dam water backup
- Felt underlayment (15# or 30#) — traditional option; still used in some applications but largely superseded by synthetics
Ice & Water Shield: Critical for Colorado Roofs
Colorado building codes require ice and water shield at eaves in areas with freezing temperatures. We install it generously beyond minimums to protect your roof from the ice dams that Longmont winters reliably produce. Skipping or minimizing ice and water shield is a critical mistake we never make.
Get a properly-built roof at Josh Brooks Construction and Renovation Inc.
Data You Can Trust
Colorado Homeowners: The Numbers Behind Your Biggest Investment
$1.9B
Front Range hail damage May 2024
NOAA
3×
more likely to claim with roof 20+ yrs old
Insurance Data
96%
ROI on minor kitchen remodel
2025 Cost vs. Value
86%
basement finishing costs recovered
NAR / NARI
“Roofing underlayment in Longmont — synthetic underlayment is the right choice for Colorado’s weather demands. I’ve been installing it since 2014 as part of every roof replacement.”
Josh Brooks
Licensed General Contractor CON-24-0152 | Northern Colorado Since 2014
