If you suspect older pipe insulation contains asbestos (indicated by a distinct corrugated look), do not disturb it; consult a professional for removal as fibers can be a serious health hazard.
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Steps
1
Identify at-risk pipes in unheated areas of the home, such as the basement, crawl spaces, attics, garages, or within exterior walls.
2
Remove any old, degraded insulation from the pipes using a utility knife.
3
Select the appropriate insulation material based on the pipe's use: use vapor barrier-wrapped insulation for cold-water lines to control condensation, or fiberglass pipe covers for areas with unusually high temperatures.
4
Wrap the new lengths of insulation around the pipes. If using conventional foam with a side slit, fit the foam over the existing pipe.
5
Seal the insulation. For self-sealing foam, remove the protective backing and press the adhesive edges together. For conventional foam, use tape to shut the slits to enhance insulating capability.
6
Secure the joints where two pieces of insulation meet by wrapping the edges with electrical tape.
7
Inspect the installation to ensure there are no gaps and that all high-risk sections are fully covered to prevent freezing and minimize heat gain or loss.
Pro Tips
Insulating hot-water pipes results in lower monthly energy bills and reduces the time you must wait for hot water to reach fixtures.