Burst & Frozen Pipes

Understanding Burst & Frozen Pipes

Burst and frozen pipes are among the most common causes of water damage in Philadelphia homes, especially during winter months when temperatures regularly drop below freezing. When water inside a pipe freezes, it expands and creates enormous pressure — up to 2,000 PSI — that can split copper, crack PVC, and rupture galvanized steel. The resulting water release can dump hundreds of gallons per hour into your home. In Philadelphia's aging housing stock, where many homes still have original galvanized or lead pipes from the early 1900s, the risk is compounded by decades of corrosion and mineral buildup. Pipes in unheated spaces — basements, crawl spaces, exterior walls, and attics — are most vulnerable. A single burst pipe on an upper floor can cascade water through multiple levels, damaging ceilings, walls, flooring, and personal property on every floor below.

What to Do Right Now

1. Shut off the main water supply valve immediately⚡ Time-Critical✓ DIY Safe

   Every minute of water flow adds hundreds of gallons and thousands of dollars in damage. The shutoff is typically in the basement near the front wall, or at the meter outside.

2. Turn off electricity to affected areas at the breaker panel⚡ Time-Critical✓ DIY Safe

   Water and electricity are a lethal combination. Even if water hasn't reached outlets yet, it can travel through walls and reach wiring.

3. Open faucets to drain remaining water from the system⚡ Time-Critical✓ DIY Safe

   Relieves pressure in the pipes and drains water that would otherwise continue leaking from the break point.

4. Begin removing standing water with towels, mops, or a wet vacuum⚡ Time-Critical✓ DIY Safe

   Every hour water sits, it penetrates deeper into flooring, subfloor, and wall cavities. Mold growth begins within 24-48 hours.

5. Move furniture and valuables away from wet areas⚡ Time-Critical✓ DIY Safe

   Prevents secondary damage to personal property. Furniture left on wet carpet creates permanent staining and accelerates carpet deterioration.

6. Document everything with photos and video before cleanup✓ DIY Safe

   Insurance requires evidence of the damage. Photograph the burst pipe, the water source, all affected areas, and damaged items.

7. Call a restoration professional — do not wait⚡ Time-Critical

   Professional extraction removes up to 97% of water. The 24-48 hour window before mold begins is critical. Professional drying equipment is essential for walls and subfloor.

Insurance Coverage

Almost always covered if the pipe burst was sudden and accidental. Standard HO-3 policies (the most common in Philadelphia) cover burst pipes as a named peril. However, your insurer may deny the claim if they determine the pipe failed due to lack of maintenance, gradual corrosion, or failure to maintain heat in the property. Document everything and call your insurer immediately. Your out-of-pocket cost is typically your insurance deductible (usually $500-$2,500 in Philadelphia). The restoration company works directly with your insurer for the rest.

Philadelphia-Specific Information

Philadelphia's median rowhouse age is 93 years. Pre-1950 homes commonly have galvanized steel or cast iron pipes with 40-50 year lifespans — most are well past replacement age. Pipes in uninsulated exterior walls of brick rowhouses are especially vulnerable. Many renovated homes in Fishtown and Northern Liberties have a mix of new PEX and old galvanized, creating weak points at connection joints. The January 2018 deep freeze caused 366 water main breaks citywide in a single event. Common in Northeast Philadelphia (exposed pipes in older single-family homes), Fishtown/Northern Liberties (renovated rowhouses with mixed old/new plumbing), and Germantown/Mt. Airy (large older homes with extensive pipe runs). PWD emergency line: (215) 685-6300 for water main issues.

Cost Estimate — Philadelphia Metro Area

When to Call a Professional

Call a professional immediately for any burst pipe situation beyond a small drip on hard flooring. Professional extraction equipment removes up to 97% of water — far more effective than consumer equipment. More importantly, professional moisture meters detect water in wall cavities and subfloor that you can't see or feel. Hidden moisture is what causes mold and structural damage weeks later. If water has reached carpet, entered wall cavities, or seeped to a lower floor, professional drying is not optional — it's essential to prevent mold within the 24-48 hour window.

Burst & Frozen Pipes — Frequently Asked Questions

Sources & References

• According to IICRC S500 Section 10, water damage from burst pipes starts as Category 1 (clean water) but degrades to Category 2 within 24-48 hours if not dried, as bacterial growth begins in standing water and saturated materials.
• Under Pennsylvania's bad faith statute (42 Pa.C.S. § 8371), homeowners whose burst pipe insurance claims are improperly denied or delayed can recover punitive damages, court costs, and attorney fees.
• According to the Philadelphia Water Department, the January 2018 deep freeze caused 366 water main breaks in a single event, highlighting the vulnerability of Philadelphia's aging water infrastructure to freezing temperatures.
• Per IICRC S520 Section 12, mold colonization can begin within 24-48 hours of water exposure at relative humidity above 60%, making rapid water extraction after a pipe burst critical to preventing secondary damage.