Letter Re: Light Blocking Suggestions for Windows

James:
In response to the recent article: Light Blocking Suggestions for Windows, I’d like to mention that another very low cost option for blacking out windows is a roll of roofing (tar) paper. It takes up very little space. It can also be used as expedient, water-resistant repair material.  – Pat O’C.

JWR Replies: Tar paper does indeed have many uses, but I’de recommend that you use it outside, rather than inside widows. Tar paper is notorious for outgassing. The distinctive tarry smell can linger for many months or even years in a confined space, so I would recommend never storing or using it inside a living space. It is also important to avoid using tar paper on the outer (exposed) layer of roofs that will be use for drinking water catchment.

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