Q: Under which circumstances is a person obligated to erect a fence around the roof of his house?

A: The Torah in parshas Ki-Setze states, “When you build a new house make a railing for your roof, and you shall not bring blood on your house if someone falls from there”.1 The Torah requires one to build a maakeh – a fence – around a flat roof that people walk on, so as to protect them from falling. The mitzvah applies not only to someone who builds a house but also to someone who buys, inherits or is gifted a house.2 A person who rents a house is also required to build a maakeh if the owner has not already done so.3

A maakeh has to be strong enough that a person could lean against it without falling, and it has to be ten tefachim high.4 This measurement is 40 inches according […]

KitchenAid 1996:
Dear Rabbi Rosen,
The STAR-K KitchenAid Sabbath Mode project had been evolving for 2 ½ years. This novel venture was initiated by KitchenAid to address the needs of the Sabbath observant Jewish community that would not be able to use the new age KitchenAid ranges and wall units due to the new electronic technology and advanced features.
Jewish Sabbbath observance does not permit the kindling or extinguishing of a fire or the cooking of food on Sabbath. Jewish Holiday observance does not permit the creation of a new flame, but cooking and adjusting fire as needed for cooking is permitted.
The issues that KitchenAid engineers had to address in order to create a user-friendly oven for the Sabbath observer were the following:
1. Could the 12-hour automatic shutoff be bypassed?
2. Could the oven be opened without lighting an icon on the control […]

Shockingly, the Natural Resources Defense Council reports that about 40% of all food in the United States goes uneaten; it is either left to rot or tossed in the garbage. In fact, 7% of all food doesn’t even make it out of the farm, and a significant amount doesn’t even get picked because it doesn’t meet standards for color and shape! One industry estimate claims that an average of $2,300 of food products are discarded each day by individual grocery stores due to impending expiration dates. American families throw out between 14-25% of the food and the beverages that they purchase, and restaurant diners leave about 17% of their food uneaten.1

Of course, we know the Torah teaches us that we need to be careful and not wasteful. We also know that we are not just talking about wasting food. We are charged to appreciate every chair, book and bobby pin […]


The Torah forbids the wearing of a garment made from tzemer (wool) and pishtim (linen) together. There are two pesukim in the Torah that refer to Shatnez. It states,1 “Ubeged kilayim shatnez lo ya’aleh alecha,” a garment composed of a mixture which is Shatnez should not be draped upon oneself. We find a different expression of this same mitzvah, “Lo silbash shatnez tzemer uphishtim yachdav2 – Do not wear shatnez, wool and linen together.” Chazal tell us that these two pesukim complement one another. In Devarim, the Torah forbids actual wearing of Shatnez – levisha, whereas the Vayikra prohibition of Shatnez includes he’elah – draping Shatnez over one’s body. The Gemara3 explains that draping is prohibited only if it is done in a way which is similar to wearing, i.e., where some benefit is derived from the Shatnez such as being covered or warmed. It is clear that one must […]