After the deposit I was told they could not do the timber windows. I asked a question about the fly-screens they told me this was not included and i would need to pay an additional $2,000USD for the fly-screens. Though in Australian I have been quoted $1,200AUD. When I asked for the certificates, they provided the certificate for structural stability as per Australian Standards, the energy rating they said they could not provide a certificate.
Do not buy from these people.