LafargeHolcim will be able to fund half of the $3.4 billion price for Firestone Building Products from its existing cash position, Chief Executive Jan Jenisch said on Thursday. “We don’t need to finance the full consideration of $3.4 billion,” Jenisch told a conference call. LafargeHolcim would still probably issue bonds to pay for part of the acquisition, although the details are still to be decided, he said.