My door lock keeps freezing to the point I can’t open it, any idea why this would happen?

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My door lock keeps freezing to the point I can’t open it, any idea why this would happen?

AJ Nov. 13, 2016Last updated: July 30, 2020

I have a newly built home (3 years) that is extremely well-insulated and airtight house that had a blower door with results near 1 ACH. I am thrilled with it in every way except that on the coldest days and nights my door lock freezes and I can’t get in and out of the house. My contractor says he followed every procedure properly and that there is nothing I can do. Any ideas?

Responses (4)

Lana-Gail Arnold
Lana-Gail Arnold Jan. 22, 2021, 11:44 a.m.

Weiser makes a product that actually is installed in the door itself and insulates your exterior knob to help prevent the condinstation from building up on the insides, helping to prevent the freezing of the internals.  I have them installed on my house and they helped alot.  I live in a very cold climate.  Mcmunn& Yates and serrubec also timbermart

John Peters
John Peters June 14, 2022, 11:17 p.m.

WD-40 is a degreaser and organic solvent that is widely used. It's made composed of alcohol-based components that keep moisture out of whatever you use it on. Frozen house door locks can be avoided by using WD40. Once or twice a week, a tiny amount of WD-40 should be sprayed directly on the lock.

Mike Reynolds June 16, 2022, 8:38 p.m.

Hi John, the recipe for WD-40 is a well kept trade secret and while it may contain some alcohol, it is mostly comprised of synthetic petroleum-derived ingredients and contains Benzene, which is a known carcinogen. It may work well, but organic in the sense we usually use the word, it most certainly is not.