Why do asphalt shingles crack in Pontiac winters?

Temperature swings exceeding 80 degrees between day and night cause repeated expansion and contraction that stresses the asphalt binder holding granules to the fiberglass mat, eventually creating cracks that allow water penetration and accelerate deterioration.

What does proper underlayment involve?

Synthetic underlayment covers the entire roof deck to create a secondary water barrier, while ice and water shield along eaves extends up the roof slope at least 24 inches past the interior wall line to prevent ice dam water from reaching the deck surface.

How does shingle quality affect longevity?

Premium architectural shingles contain 30 to 40 percent more asphalt than three-tab economy products, providing better flexibility during freeze-thaw cycles and greater resistance to granule loss that exposes the underlying material to UV damage and accelerates aging.

When is the best time to install a new roof?

Spring and fall provide optimal temperature ranges for shingle sealing—the adhesive strips that bond each shingle to the course below require moderate warmth to activate properly, while extreme summer heat can make materials difficult to handle and winter cold prevents proper bonding.

What preparation happens before shingle installation?

The existing roof is removed completely, deck boards are inspected for moisture damage or rot and replaced where necessary, and the entire surface is swept clean of debris before any underlayment or shingle material is applied to ensure proper adhesion.

Asphalt Shingle Roofing

Freeze-thaw cycling causes asphalt shingles to expand and contract repeatedly throughout Michigan winters, creating stress that exceeds material flexibility in lower-quality products and leads to cracking along tab edges and curling at corners where fasteners no longer hold properly. When you notice shingle tabs lifting in high winds, granules accumulating in gutters during rain events, or visible cracking across multiple roof sections, the material has reached the end of its functional lifespan regardless of its stated warranty period. DG Builders LLC installs premium asphalt shingle systems throughout Pontiac and Mid-Michigan using proper underlayment layering that addresses the specific failure patterns seen in this climate zone.

Shingle installation requires removing existing materials to expose the roof deck, repairing any moisture-damaged decking boards, installing ice and water shield along eaves and valleys, applying synthetic underlayment across all remaining deck surfaces, then fastening shingles with nailing patterns that resist wind uplift without over-driving fasteners through the shingle material. The underlayment system provides the actual weather barrier while shingles protect that barrier from UV degradation and physical impact.

Request a property evaluation to determine whether current shingle damage requires full replacement or targeted repair work.

Premium asphalt shingles contain higher asphalt content and heavier fiberglass mat backing than economy products, providing better flexibility during thermal cycling and greater resistance to tearing during high-wind events. DG Builders LLC uses architectural-grade shingles with multiple laminated layers that create dimensional appearance while adding weight that resists wind uplift, particularly important in exposed roof areas and along ridge lines where wind forces concentrate. Proper fastening involves driving nails to manufacturer specifications—too shallow and shingles blow off, too deep and the fastener tears through the material during thermal expansion cycles.

After installation, your roof has shingle coverage that remains flat against the deck rather than curling at edges, tabs that stay sealed during wind events instead of lifting and tearing, and granule surfaces that maintain coverage rather than washing away to expose the underlying asphalt layer. The difference becomes visible during the first major storm when properly installed shingles remain in place while neighboring roofs lose materials to wind.

Shingle color selection affects attic temperature—darker colors absorb more solar heat, which can increase cooling costs but aids snow shedding in winter, while lighter shades reflect more energy and reduce summer attic temperatures. Ventilation requirements remain constant regardless of color choice, since unbalanced attic airflow causes problems whether the roof surface runs hot or moderate.

Why do asphalt shingles crack in Pontiac winters?
Temperature swings exceeding 80 degrees between day and night cause repeated expansion and contraction that stresses the asphalt binder holding granules to the fiberglass mat, eventually creating cracks that allow water penetration and accelerate deterioration.
What does proper underlayment involve?
Synthetic underlayment covers the entire roof deck to create a secondary water barrier, while ice and water shield along eaves extends up the roof slope at least 24 inches past the interior wall line to prevent ice dam water from reaching the deck surface.
How does shingle quality affect longevity?
Premium architectural shingles contain 30 to 40 percent more asphalt than three-tab economy products, providing better flexibility during freeze-thaw cycles and greater resistance to granule loss that exposes the underlying material to UV damage and accelerates aging.
When is the best time to install a new roof?
Spring and fall provide optimal temperature ranges for shingle sealing—the adhesive strips that bond each shingle to the course below require moderate warmth to activate properly, while extreme summer heat can make materials difficult to handle and winter cold prevents proper bonding.
What preparation happens before shingle installation?
The existing roof is removed completely, deck boards are inspected for moisture damage or rot and replaced where necessary, and the entire surface is swept clean of debris before any underlayment or shingle material is applied to ensure proper adhesion.

Shingles Designed for Extreme Temperature Swings