Joist allows you to add photos to your estimates and invoices, embedding them directly into the document.
Other types of files, like PDFs, Word or Excel docs, etc, are not currently supported at this time.
If you would like to send a file to your client along with your Joist estimate or invoice, as a workaround you can email the estimate or invoice to yourself first, then forward that email to your client, attaching the file in the process.
Or you can send them a separate email just before or after you send the estimate or invoice from Joist.
If you would like to request this, or any other feature not currently available in Joist, be sure to check out our Feature Request section and let our team know!