The contract will now run from 2012 until 2016 and is expected to be worth more than £50m over the next four years.
Speedy is the preferred supplier for a full range of products and services across all Carillion's UK operations including joint ventures where it is the lead company.
Speedy chief executive Steve Corcoran said: "I am delighted that we continue to develop our relationship with Carillion, one of the UK's largest construction and support services companies. This new agreement is another important step in our growth in our key markets of water, waste, energy and transport, all of which are undertaking major new infrastructure projects in the UK."
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