A New Limerick mill that produces wood siding and trim products celebrated a grand opening of its newly-converted mill today, the $150 million project part of its parent company’s nationwide expansion plan. Louisiana-Pacific Corporation, based in Nashville, officially announced the facility’s expansion back in February 2022. …the work is part of a multi-year plan for the company to ramp up its siding production nationwide. The LP Houlton Mill is the first stage of that plan. “We will always take care of our customers, which is why siding capacity expansion projects, like our conversion of LP Houlton, are incredibly strategic and important to LP,” said the company’s executive vice president Jason Ringblom. …Sen. Susan Collins and Gov. Janet Mills attended Wednesday’s grand opening at the LP Houlton Mill, and congratulated the company on its expansion. …The expansion adds about 220 million square feet … making enough siding for 100,000 more homes annually.