Why Are My Shingles Cracking and Curling in North Dakota?
Shingles crack and curl when the asphalt inside them dries out and loses its flexibility, and North Dakota temperature swings speed that up more than almost any climate in the country. A Fargo roof surface can sit at 30 below in January and pass 150 degrees in July, and that expansion and contraction, repeated over 15 to 20 years, eventually lifts the edges and splits the mat. Dodd Roofing and Exteriors inspects roofs across Fargo, West Fargo, Moorhead, and Horace, and curling usually shows on south and west slopes first.
What is the difference between curling and cracking?
Curling comes in two forms. Cupping is when the edges of the shingle turn up, and clawing is when the center lifts while the edges stay down. Cracking shows as hairline splits across the shingle, often running in straight lines along the fiberglass mat. Both mean the asphalt has aged out. Curled edges break the seal strip and give wind something to grab, which is why curled roofs lose shingles in storms well below their rated wind speed.
Does cold weather cause shingles to crack?
Cold alone does not crack a sound shingle, but it makes an aging one brittle. Foot traffic, ice removal, and hail during cold months split brittle shingles that would flex in summer. Spring and fall are the hardest seasons, when the roof surface can swing 60 degrees or more in a single day.
Can poor attic ventilation make shingles curl faster?
Yes. An attic that traps summer heat bakes the shingles from below, and one that traps winter moisture pushes vapor into the underside of the deck. Both dry the asphalt out early. A Fargo roof with blocked soffits or too few exhaust vents can lose several years of life. If you have seen frost in the attic or ice dams, ventilation is likely part of the curling problem too.
Can cracked or curling shingles be repaired?
A handful of curled shingles in one area can be re-sealed or swapped out on a roof under 12 years old. Curling or cracking across a whole slope means the shingles are at the end of their life, and patching wastes money because the neighbors fail next. Homeowners insurance treats this as wear and tear, not storm damage, so it is not a claim. The exception is a roof with cracks next to fresh hail bruising, and our guide to what hail damage actually looks like explains how to tell them apart.
When should you replace a curling roof in Fargo?
This fall, before the ground freezes. New shingles need warm afternoons to seal down, and a curled roof that goes into winter unsealed is the one that loses shingles in a February wind. Ask about Class 4 impact resistant shingles, which hold up better to hail and often earn an insurance discount. Call Dodd Roofing and Exteriors at (701) 831-0710 for a free roof inspection in Fargo, West Fargo, Moorhead, or Horace.
Comments