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(833) 490-5225
Serving Jefferson County

Ice Dam and Roof Leak Water Damage in Sullivan, WI

Ice dam damage and roof leaks in Sullivan after winter storms, with assessment of attic insulation, ventilation and flashing failures that let meltwater into the structure.

  • Phones answered 24/7
  • Burst pipes, wet basements, ice dams
  • Estimate approved before work starts
  • Moisture readings and photos for your claim

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Ice Dams & Roof Leaks

Ice Dam and Roof Leak Water Damage: what it covers

Quick answer

Ice dams form when warm air escaping through an attic melts snow on the roof, the water runs down to the eave where it refreezes, and the dam backs water up under the shingles and into the attic. The fix is a combination: reduce heat loss from the attic (insulation), improve air circulation (ventilation), and ensure flashing is sealed and sound. Restoration after ice dam damage includes assessment of the insulation and ventilation, removal of any mold that grew during the wet period, and replacement of wet drywall or framing. In Sullivan, where snowfall averages 45 to 50 inches annually and freeze-thaw cycles are intense, ice dams are a seasonal risk from December through March. Sullivan Water Damage Restoration evaluates roofs for ice dam vulnerability and handles water damage restoration after leaks occur.

Ice Dam and Roof Leak Water Damage illustration for Sullivan, WI, with the river in the background

The mechanism is simple: heat in the attic melts the snow sitting on top of the roof, the water runs down, reaches the eave where the roof deck temperature is below freezing, and the water refreezes. A dam builds up, and water trapped behind it backs up under the shingles, enters the attic, and leaks down into the living space. The classic sign is a water stain on the ceiling running the length of an outside wall, with the stain centered in that room.

Not all roofs get ice dams. A well-insulated attic that is also well-ventilated stays cold enough that snow does not melt on the roof. But many homes built before energy codes improved have insufficient insulation or poor ventilation, so the attic stays warm, snow melts, dams form, and water enters the home. Attic modifications can prevent ice dams, but diagnosis must come first: a thermal inspection can show where heat is escaping and where airflow is blocked.

Restoration after ice dam damage includes water extraction, drying of the attic and the rooms below it, and inspection for mold growth in insulation and framing. Once the structure is dry, insulation and ventilation are evaluated so the problem does not repeat next winter. (833) 490-5225 is answered 24/7 for emergency water extraction after an ice dam leak.

Service area
Sullivan & Jefferson County
Availability
Phones answered 24/7
Warning signs

Signs you need ice dam and roof leak water damage

Never climb onto a roof with ice present. Do not strike ice dams with hammers or crowbars, as you risk puncturing the roof or falling. Call (833) 490-5225 for safe extraction and drying.

  • Ice buildup along the eave or in the gutters during winter, especially after a warm spell followed by a freeze
  • Water staining on the ceiling or upper wall of a room just inside an exterior wall, often in a line running the width of the room
  • Wet insulation or brown staining on attic framing near the top plate, indicating water entry from above
  • A musty smell in an upper-floor bedroom or bathroom during the melting season
  • Water dripping from the soffits or eaves when snow is present on the roof but not from other parts of the roof
  • Peeling paint or blistering on soffit trim boards
  • Visible daylight or moisture around roof penetrations (vents, chimneys) in winter
Options

Types and options for ice dam and roof leak water damage

Attic insulation loss and ice dams on colonial and two-story homes

Older colonial and two-story homes often have insufficient attic insulation and poor roof ventilation, making them prime candidates for ice dam formation. The heat loss from the living space below melts the snow, creating the dam. Restoration requires both water damage cleanup and insulation/ventilation upgrades.

Ice dam leaks in finished attics or bonus rooms

When an attic is finished or partially finished, the insulation placement and air sealing become critical. Heat from the conditioned space below melts snow on the roof, and the water enters the finished room. The restore-and-upgrade approach prevents recurrence.

Valley and complicated roof ice dams

Complex roof shapes with valleys, dormers, and intersecting planes create areas where snow collects and ice dams are more likely. Water trapped in a valley behind an ice dam can leak into walls below. Restoration includes flashing inspection and possible flashing replacement.

Ice dam damage to gutters and soffits

Heavy ice buildup can pull gutters away from the fascia, damage soffit trim, and create gaps where water backs up into the eave. Gutter and soffit replacement is part of the full restoration after an ice dam event.

One call and it gets handled.

A crew is dispatched as fast as one is available, and you approve the estimate before any work starts.

How do I prevent ice dams?

Add insulation to the attic and ensure soffit and ridge ventilation are open and balanced. The attic must be cold (close to outside air temperature in winter) and well-ventilated so that snow on the roof does not melt. If you have ice in your gutters every winter, adding insulation is worth the cost.

A well-insulated, well-ventilated attic stays close to the outside air temperature, so snow does not melt on the roof. The insulation acts as a blanket between the warm living space and the cold roof, and the ventilation allows cold outside air to flow through the attic, flushing out any heat.

Most homes built before 2000 do not have enough attic insulation. Adding 4 to 6 inches of blown-in cellulose or fiberglass is a typical upgrade and can prevent ice dams. Ventilation upgrades (soffit vents, ridge vents, or both) ensure the cold air can actually flow.

Can I melt an ice dam with heat tape or calcium chloride?

Heat tape applied to the eave can melt the ice temporarily, but it does not fix the underlying problem—heat loss from the attic. Calcium chloride (the granules) can melt part of the dam but can damage gutters and stain siding. The permanent fix is insulation and ventilation.

Heat tape is a short-term measure for an emergency (active water intrusion) and uses significant electricity. Calcium chloride melts ice but leaves salt residue that corrodes aluminum gutters and stains paint or siding.

Once the water damage is dried and restored, the investment in attic insulation and ventilation prevents the problem from recurring and saves money on heating costs winter after winter.

Is mold a risk after ice dam water intrusion?

Yes. Water that enters the attic and is not dried quickly can promote mold growth on insulation, framing and drywall. Attic moisture is often slow to dry because of poor ventilation, so extraction and dehumidification are critical.

A wet attic is cold and stagnant, so drying takes time. Running dehumidifiers and checking moisture readings daily ensures the space dries completely before it is closed up.

Once dry, the insulation and any damaged wood framing is inspected. Visible mold is removed with the material (wet insulation is always replaced). The goal is a clean, dry attic before new insulation is installed.

What is the cost of ice dam restoration?

Water damage restoration (extraction, drying, mold assessment) ranges from $1,500 to $5,000 depending on the extent of water intrusion and the size of the affected area. Attic insulation and ventilation upgrades to prevent recurrence are a separate estimate.

Call (833) 490-5225 with photographs of the staining and the extent of the problem (is it one corner of the attic or the entire eave?). A technician will assess the damage and provide a scope and estimate before work begins.

Many insurance policies cover ice dam water damage if the home has been well-maintained. Check with your agent and your policy's terms on insulation and ventilation as prerequisites for coverage.

Our process

How our ice dam and roof leak water damage visit works

  1. Inspect the attic to identify heat loss and ventilation gaps

    A technician enters the attic with a thermal camera and measures insulation depth and coverage. Ventilation gaps, blocked vents, and thermal bridges (roof rafters, wall framing) are photographed and documented. The attic temperature is compared to the outside air to confirm heat is escaping.

  2. Assess roof damage from the ice dam and water intrusion

    The underside of the roof decking is inspected for staining, soft spots, or mold. If water entered, the attic joists, rim board, and the top plate of the exterior wall are checked. Penetrations (vents, chimney flashing) are examined for gaps.

  3. Extract water and dry the affected areas

    Wet insulation is removed and replaced. Drywall ceilings with water damage are assessed for repair or replacement. Air movers and dehumidifiers run until moisture readings confirm the space is dry.

  4. Recommend and schedule insulation and ventilation improvements

    Once restoration is complete, recommendations are made for additional insulation, soffit ventilation, ridge ventilation, or both, depending on the audit. These improvements prevent ice dams and reduce heating costs in winter.

Jefferson County

Why ice dam and roof leak water damage is different in Jefferson and Waukesha counties

Sullivan is at elevation 910 feet, with an average January low of -7°F and average January high of 23°F, creating intense freeze-thaw cycling. Snowfall averages 47 inches annually (NOAA data).

The Jefferson County area sees peak ice dam formation from late December through February, when outdoor air temperatures remain below 25°F but solar radiation on south-facing roofs can reach 40–45°F due to the low winter sun angle.

Older farmhouses and lake homes in the area often have unfinished or partially finished attics with poor insulation (R-11 or R-19), making them especially prone to ice dams.

The Bark, Rock and Crawfish river valleys are subject to humid air masses in winter, which increases snowfall rates and the risk of heavy snow loads that drive ice dam formation.

DSPS building code requires R-30 attic insulation minimum (R-38 in newer homes); many older homes are at R-15 or less, making upgrades cost-effective.

Related

Water Damage Restoration

Extraction, structural drying with daily moisture readings, and cleanup for Sullivan homes, farmhouses and businesses across Jefferson County.

Structural Drying and Dehumidification

Professional structural drying and dehumidification for Sullivan homes and businesses, with daily moisture readings, ambient humidity control, and verification of complete drying to prevent mold and secondary damage.

Mold Inspection and Remediation

Mold assessment and remediation in Sullivan after water damage, including visible growth inspection, containment and cleanup protocols.

Basement Flooding Cleanup

Emergency extraction and drying for flooded basements in Sullivan, from heavy rain, spring thaw, plumbing failure or sump pump breakdown.

Guides

Read before you book

FAQ

Ice Dam and Roof Leak Water Damage FAQs

Does heat tape really prevent ice dams?

Heat tape melts some ice but uses significant electricity and does not address the root cause (heat loss from the attic). It is a temporary fix for active water intrusion, not a solution.

How long does it take to dry an attic after ice dam water entry?

With dehumidifiers and air movers running, a typical attic dries in 5 to 7 days. Moisture readings are taken daily to confirm drying progress. Wet insulation is usually removed and replaced rather than dried in place.

Can I upgrade my attic insulation in winter?

No. Attic work requires good weather and daylight for safety. Insulation and ventilation upgrades are scheduled for late spring or early fall.

Will insurance cover both water damage restoration and the insulation upgrade?

Insurance covers the water damage restoration. Attic insulation and ventilation upgrades are not covered (they are maintenance) but are a good investment to prevent future ice dams.

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