
Building envelope arguably encompasses the entire exterior building system of your home. The envelope serves to protect the interior while facilitating climate control. What is a Building Envelope Specialist?Ī simple definition of building envelope is the separation of the interior and exterior of a building.How Can I Make a Building Envelope Better?.What is the Function of a Building Envelope?.Users of IRCs will often, as a courtesy, also send a self-addressed envelope to save the receiver the cost and time of buying and labeling an envelope. Instead, international reply coupons (IRCs) can be purchased at post offices, although they are no longer sold in some countries, including the United States. SASEs cannot easily be used for international mail, since senders rarely have supplies of mint foreign stamps. In Japan, return postcards are used for similar purposes. In the case of amateur radio, operators will send a SASE when requesting another station's QSL card. An enthusiast will send an autograph request to a celebrity or athlete through the mail and include a SASE, which the celebrity or athlete will use to return the autographed item.

SASEs are also vital in the hobbies of autograph collecting and amateur radio. One of the most common uses is when companies are legally required to send something upon request, such as a "winners list" at the end of a sweepstakes the company will require a SASE to be included with the request to avoid paying postage. SASEs are used when communicating with companies, charities or celebrities (for fan post), in cases where each recipient can afford the cost of a single stamp and envelope, but it would be a burden on the organization to pay for the postage on all the letters it sends out.

Important uses for SASEs are when requesting information about products or services, or when sending manuscripts to literary agents.
