How do I fix noisy pipes in my Calgary bathroom after a renovation?

Noisy pipes after a Calgary bathroom renovation are typically caused by water hammer, loose pipe strapping, thermal expansion in copper lines, or high water pressure — and most can be resolved without tearing open your newly finished walls. The type of noise tells you a lot about the cause, so identifying whether you hear banging, rattling, whistling, or ticking is the first step toward a fix.

Water hammer — a loud banging or thudding when a faucet or valve shuts off quickly — is the most common post-renovation pipe noise. It occurs when fast-closing valves (like those in touchless faucets, single-lever faucets, or toilet fill valves) abruptly stop water flow, sending a pressure shockwave through the pipes. New fixtures installed during your renovation may have different valve closing speeds than your old ones, triggering water hammer that was not present before. The fix is a water hammer arrestor, a small device that absorbs the pressure surge. A plumber can install arrestors at the fixture supply connections for $50 to $150 per location, including parts and labour. For a DIY approach, screw-on water hammer arrestors that attach between the shut-off valve and the supply line cost $15 to $30 each at Calgary hardware stores and require no special tools.

Rattling or vibrating noises during water flow usually indicate pipes that are not properly secured inside the walls. During renovation, plumbing lines may have been repositioned without adequate strapping or cushioning — pipes need to be secured with appropriate hangers or clips every 32 inches on horizontal runs and every 6 to 8 feet on vertical runs, with cushioned clamps to prevent metal-on-metal contact. If the noise comes from inside a finished wall, a plumber may be able to access the pipes through an adjacent unfinished space (basement ceiling, utility room, or access panel) without opening the new bathroom walls. If wall access is necessary, this is a warranty issue that your renovation contractor should address — contact the contractor who did the work first, as improperly secured pipes are a workmanship defect.

A ticking or creaking sound, particularly when hot water is running, is thermal expansion in copper pipes. Copper expands when hot water flows through it and contracts as it cools, and if the pipe passes through a tight hole in a stud or joist, it rubs and clicks as it moves. This is common in Calgary homes due to the extreme temperature differential between cold supply water (2 to 5 degrees in winter) and hot water from the tank (typically 49 to 60 degrees). PEX piping is less prone to this noise because it is flexible, which is one reason many Calgary plumbers now prefer PEX for bathroom renovations. If your renovation used copper, enlarging the holes where pipes pass through framing and adding foam insulation sleeves can eliminate the ticking.

High water pressure — above 80 PSI — can cause whistling, humming, or vibrating in pipes, especially through partially open valves. Calgary's municipal water pressure varies by neighbourhood and can exceed comfortable levels in lower-elevation areas. A pressure-reducing valve (PRV) installed on your main water line regulates pressure to a safe 50 to 70 PSI range and costs $250 to $500 installed. If you already have a PRV, it may need adjustment or replacement — they typically last 7 to 12 years.

If noisy pipes developed immediately after your renovation, document the issue and contact your renovation contractor. Properly secured and installed plumbing should not produce disruptive noise, and most reputable contractors will address this under their workmanship warranty. For persistent issues, a licensed plumber can diagnose the specific cause — ensure they carry WCB Alberta coverage. Find qualified contractors through the Calgary Construction Network directory.

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Looking for experienced contractors? The Calgary Construction Network connects homeowners with qualified professionals:

• Mike’s Restoration Service
• Durable Decks
• Premium Built Structures
• Besademolition
• Onsite Contracting and Electrical Services