You can find the information on the Yardener.com website here: http://gardening.yardener.com/HousingforWrens. If you use our search you will find other information about wrens and bird houses. If you need more information, Google "how to build a wren house" and you will get several sites that give information. What they may not tell you is wrens prefer to have their houses mounted between 6 to 10 feet in height. Best And Happy Yardening, Nancy.