How to Insulate Pipes to Prevent Freezing

Pipes in unheated spaces act like heat thieves, drawing energy from your water supply until the pressure inside forces a rupture. A frozen pipe is more than just a momentary inconvenience; it is a pressurized disaster waiting for the moment you turn on the faucet. Insulating your plumbing is the simplest form of home defense you can perform. By creating a thermal barrier, you keep the water temperature above the critical threshold and protect your home from the catastrophic water damage that follows a burst pipe. Done well, this project is invisible, effective, and buys you peace of mind during the coldest months of the year.

1. Measure before you buy. Identify all exposed pipes in unheated areas like crawl spaces, attics, and garages. Measure the diameter of the pipes to ensure you purchase the correct size of insulation tubing.
2. Clean every inch first. Wipe down the exterior of the pipes with a dry cloth to remove dust, grease, or grime. Insulation adhesive will not bond properly to dirty or damp metal.
3. Square cuts seal tight. Measure your foam sleeves against the pipe lengths and cut them to size using a sharp utility knife. Ensure your cuts are square for seamless joints.
4. Wrap and press tight. Spread the slit on the foam sleeve and wrap it around the pipe. Press the edges together firmly to engage the pre-applied adhesive or seal the seam with quality duct tape.
5. Seal every seam. Wrap the joints where two pieces of insulation meet with weather-resistant tape. This prevents cold air from infiltrating the gaps between the sleeves.
6. Hunt down bare spots. Walk the length of the insulated pipe to ensure no bare metal is exposed. Re-apply tape or adjust sleeves where the fit feels loose.