James Hardie is appealing against a decision to award a Perth man $2 million after it was found to have caused his cancer.

Simon Lowes, 42, contracted mesothelioma after being exposed to asbestos at the Castledare Miniature Railway in suburban Wilson which he visited as a child.

James Hardie used the site to dump its asbestos waste.

Last month the Supreme Court found the company's negligence caused Mr Lowes's cancer and awarded the father of two more than $2 million compensation.

James Hardie has lodged an appeal against the ruling and is now in the process of building its case.

In a statement from his lawyer, Mr Lowes says he is extremely disappointed with the company's decision.