My builder is hiding behind his limited company status

I have a county court judgment against him for a botched job on
my roof, but I can’t get the money

I have taken a builder to court over a botched roof
installation. An independent surveyor concluded that it does not
comply with building regulations or installation guidelines. I won
by default and now have an £8,000 county court judgment (CCJ)
against the company, SIN Building Services.

It refuses to pay and as it is a limited company there
seems little way to enforce it. There is no trading address to send
bailiffs to and it has opened a new company to run accounts
through.

Source: FS – All-News2-Economy
My builder is hiding behind his limited company status