Should I use PEX or copper pipe when re-plumbing my house?

For most New Brunswick homes, PEX is the better choice for re-plumbing projects — it's more affordable, faster to install, and handles our freeze-thaw cycles better than copper.

PEX offers significant advantages in our climate. Unlike copper, PEX can expand slightly when water freezes, making it much less likely to burst during those brutal -30°C snaps we get in Fredericton or Edmundston. It's also unaffected by our acidic well water, which is common in rural New Brunswick and can cause copper to develop pinhole leaks over time. Installation costs are typically 30-40% lower than copper since PEX uses fewer fittings and can be run in longer continuous lengths.

Copper still has its place in certain situations. If you're renovating a heritage home in Saint John's Uptown or Fredericton's historic district, copper maintains the traditional aesthetic and may be preferred for exposed runs. Copper also handles extreme heat better, making it the right choice immediately around boilers or near wood stoves. Some homeowners simply prefer copper's proven 50+ year track record.

Consider your water source when deciding. If you're on a private well (common throughout rural New Brunswick), have your water tested first. High acidity or mineral content can affect both materials differently. PEX is generally more forgiving with water quality issues, while copper can develop green staining or corrosion with certain water chemistry.

This work requires a licensed plumber in New Brunswick. The Department of Justice and Public Safety — Technical Inspection Services (TIS) requires all plumbing installations be done by someone holding a valid New Brunswick plumber's licence. Your plumber will need to obtain a plumbing permit from TIS before starting work, and the installation must pass inspection before you can use the system.

Expect to pay $8-15 per linear foot for PEX installation versus $12-20 for copper in the current New Brunswick market. A typical 1,500 sq ft home re-plumb runs $6,000-12,000 with PEX, compared to $9,000-18,000 with copper. These ranges include materials, labour, permits, and basic fixture connections.

Your next step is getting quotes from licensed plumbers who can assess your specific situation — they'll factor in your home's age, water source, and layout to recommend the best approach for your project.

---

Find a Plumbing Contractor

New Brunswick Construction Network connects you with experienced contractors in the directory:

• Eastbound Homes ✓
• Nordic Outdoor Living and Leisure ✓
• Chim Chimney Stoves & Services Inc. ✓