Inkatha Freedom Party leader Mangosuthu Buthelezi is disappointed by disruptions during President Jacob Zuma's state-of-the-nation address to Parliament on Thursday.

"I was definitely very disappointed. While I agree with the general unhappiness, I don't think that is the right way to handle it... to waste our time," he said after the event.

Economic Freedom Fighters MPs interrupted Zuma to ask when he would pay back the money for security upgrades made to his private Nkandla residence in KwaZulu-Natal.

Buthelezi also expressed his displeasure at the jamming of cellphone signals in the Chamber at the beginning of proceedings.

"I think it was absolutely amazing, because if it was done by intelligence, then God help us."

He was pleased that Zuma touched on policy aimed at improving education, but said he "wasn't inspired, wasn't feeling hope" at the number of schools that were being built.

He also did not feel that government was getting on top of economic issues.