The information contained in this publication represents current research results available to

CMHC, and has been reviewed by a wide spectrum of experts in the housing industry. Readers

are advised to evaluate the information, materials and techniques cautiously for themselves and

to consult appropriate professional resources to determine whether information, materials and

techniques are suitable in their case. The drawings and text are intended as general practice

guides only. Project and site-specific factors of climate, cost, aesthetics, and so on must be taken

into consideration. Any photographs in this book are for illustration purposes only and may not

necessarily represent currently accepted standards