Non-Standard Construction

syndrome78

I'm considering buying a non-standard timber frame with reneder applied externally onto a wire mesh, this is a 1930's property on the south coast and was a fairly common type of construction at the time.
I do not require a mortgage and if i buy i intend to extend the property fairly extensively using traditional building methods (bricks & mortar). My main concerns are with sell on issues, if or when it is time to sell i am unsure if the property will be mortgagable, i am told that as it stands it is unlikely that a lender would mortgage the property, would a later bricks and mortar extension to the property make any difference.