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Ice Dam Formation and Prevention

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Ice dams form when warmth from the attic causes roof snow to melt and flow to roof eaves where it refreezes at the colder overhang and forms a buildup of ice causing more snowmelt to puddle where it can wick back through shingles and leak into the attic

Ice dams form when warmth from the attic causes roof snow to melt and flow to roof eaves where it refreezes at the colder overhang and forms a buildup of ice causing more snowmelt to puddle where it can wick back through shingles and leak into the attic
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Ice dams formed by melting of snow on roofs can affect roofs, walls, ceilings, siding, and insulation.

Ice dams formed by melting of snow on roofs can affect roofs, walls, ceilings, siding, and insulation.
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IECC Climate Zone 1A: Flat Roof, Unvented, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 1A: Flat Roof, Unvented, 2x6 Wall, Monolithic Slab on Grade
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IECC Climate Zone 1A: Unvented Attic, 2x6 Wall, Monolithic Slab

IECC Climate Zone 1A: Unvented Attic, 2x6 Wall, Monolithic Slab
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IECC Climate Zone 2A: Flat Roof, Unvented, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 2A: Flat Roof, Unvented, 2x6 Wall, Monolithic Slab on Grade
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IECC Climate Zone 2A: Unvented Attic with Spray Foam at Roof Deck, 2x6 Wall/CMU Wall, Elevated Slab

IECC Climate Zone 2A: Unvented Attic with Spray Foam at Roof Deck, 2x6 Wall/CMU Wall, Elevated Slab
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IECC Climate Zone 2A: Unvented Attic with Spray Foam at Roof Deck, 2x6 Wall/CMU Wall, Elevated Slab

IECC Climate Zone 2A: Unvented Attic with Spray Foam at Roof Deck, 2x6 Wall/CMU Wall, Elevated Slab
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IECC Climate Zone 2A: Unvented Attic, 2x6 Wall, Monolithic Slab

IECC Climate Zone 2A: Unvented Attic, 2x6 Wall, Monolithic Slab
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IECC Climate Zone 2A: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 2A: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade
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IECC Climate Zone 2A: Unvented Attic, 2x6 Wall, Pier Foundation

IECC Climate Zone 2A: Unvented Attic, 2x6 Wall, Pier Foundation
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IECC Climate Zone 2B: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 2B: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade
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IECC Climate Zone 2B: Unvented Attic, CMU Wall, Slab on Grade

IECC Climate Zone 2B: Unvented Attic, CMU Wall, Slab on Grade
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IECC Climate Zone 2B: Vented Attic, Block Wall, Slab on Grade

IECC Climate Zone 2B: Vented Attic, Block Wall, Slab on Grade
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IECC Climate Zone 3A: SIP Roof, SIP Wall, Stem Wall, Slab on Grade

IECC Climate Zone 3A: SIP Roof, SIP Wall, Stem Wall, Slab on Grade
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IECC Climate Zone 3A: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 3A: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade
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IECC Climate Zone 3A: Vented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 3A: Vented Attic, 2x6 Wall, Monolithic Slab on Grade
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IECC Climate Zone 3A: Vented Cathedral Celling, 2x6 Wall, Vented Crawl Space

IECC Climate Zone 3A: Vented Cathedral Celling, 2x6 Wall, Vented Crawl Space
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IECC Climate Zone 3B: SIP Roof, SIP Wall, Stem Wall, Slab on Grade

IECC Climate Zone 3B: SIP Roof, SIP Wall, Stem Wall, Slab on Grade
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IECC Climate Zone 3B: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 3B: Unvented Attic, 2x6 Wall, Monolithic Slab on Grade
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IECC Climate Zone 3B: Vented Attic, 2x6 Wall, Monolithic Slab on Grade

IECC Climate Zone 3B: Vented Attic, 2x6 Wall, Monolithic Slab on Grade
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IECC Climate Zone 4A: SIP Roof, SIP Wall, Stem Wall, Slab on Grade

IECC Climate Zone 4A: SIP Roof, SIP Wall, Stem Wall, Slab on Grade
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If a cool room is directly under an attic or roof, having lighter colored roofing (home on left) will reduce heat gain to the space as compared to darker roofing (home on right) because the temperature of the roof will be lower (see thermal image)

If a cool room is directly under an attic or roof, having lighter colored roofing (home on left) will reduce heat gain to the space as compared to darker roofing (home on right) because the temperature of the roof will be lower (see thermal image)
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If snow level is estimated to exceed roof load limits, snow removal may be needed; hire professionals

If snow level is estimated to exceed roof load limits, snow removal may be needed; hire professionals