Refer to the
Matrimonial Property Act. Assets you owned prior to marriage are exempt from division, provided you keep those assets seperate. You might have to share the increase of value of those assets. When you mingle those assets, you may lose part or all of the exemption.
A pre-nup or marriage contract is good way to protect these assets further.
http://www.canlii.org/en/ab/laws/sta...000-c-m-8.html