When installing an SSL certificate you will also need the root and intermediate certificates. Without these you have a chance that the users of your website get SSL warnings because their browsers don’t trust the chain that is presented by the server.
Here is a list of the root and intermediate certificates divided per supplier. For your convenience we have bundled these files where possible.
EssentialSSL (SHA-1 / SHA256)
EssentialSSL Wildcard (SHA-1 / SHA-256)
EV SSL (SHA-1 / SHA-256)
Unified Communications Certificate (UCC)