Robert Bryant
Analyst · the line of David Begleiter with Deutsche Bank
Thanks, Charlie, and good morning, everyone. During the third quarter, if you turn to Slide 5, you can see that during the third quarter, we grew our sales by 3.2% to $1.1 billion compared to the prior year period. These results were driven by volume growth of 2.8% as increases in North America and Asia were slightly offset by moderate declines in EMEA and stronger declines in Latin America.
We realized 1.9% of growth as moderate price increases contributed to higher average selling prices across most of our regions. Partially offsetting the volume pricing growth was 1.5% from unfavorable currency translations, primarily as a result of devaluations in Latin America. Therefore, net sales growth using constant currency growth would have been a positive 4.7%.
Adjusted EBITDA increased 17.5% year-over-year to $228 million for the quarter, driven primarily by higher sales with improved mix and lower manufacturing cost from productivity initiatives. We also saw a slightly higher -- slightly lower raw material cost this quarter compared to the prior year. Adjusted EBITDA expanded by 250 basis points to 20.6%.
If you turn to Slide 6, we wanted to just take a moment to highlight the progression of our adjusted EBITDA. On a pro forma basis, as you can see, our adjusted EBITDA has expanded from $570 million in 2011 to $738 million in 2013. And on an LTM basis ended September 30 of this year, our adjusted EBITDA has increased to $833 million.
Now as Charlie stated earlier, we've generated 6 straight quarters of year-over-year growth, starting with the first full quarter since the acquisition on February 1. Now while we've made meaningful progress to date throughout the organization, we're still in the early stages of implementing several initiatives in revenues, in costs and in productivity that we believe will continue to generate significant earnings growth.
If you move on to Slide 11, where we begin to discuss our results by segment. I'd like to first talk about Performance Coatings. Net sales in our Performance Coatings segment increased 3.1% to $664 million compared to the prior period. Sales were higher across all of our geographies and in both end markets despite currency headwinds during the quarter. Growth was driven by 3.3% in volume, 1.5% from higher selling prices, which was partially offset by 1.7% from unfavorable currency.
Refinish net sales -- refinish end market net sales grew by 3.4% to $478 million, and industrial end market sales grew by 2.3% to $185 million compared to the third quarter of 2013. In our refinish end market, we continue to see strong conversions of multi-shop operators within North America and continued growth in our emerging markets.
Performance Coatings generated an adjusted EBITDA of $148.5 million, which was an increase of 0.8% compared to the third quarter of 2013. This modest improvement was driven by higher net sales but was offset by higher operational costs to support our growth initiatives. The adjusted EBITDA margin of 22.4% contracted by 50 basis points compared to the third quarter of 2013. Again, the reduction in margin was primarily attributable to increased operating expense to help grow our businesses around the world.
Moving on to Slide 8, Transportation Coatings. Net sales in this segment increased 3.4% to $445 million compared to the prior period. Growth was driven by 2.5% from higher average selling prices, 2.1% from volumes and that partially offset 1.2% of unfavorable currency. We experienced significant growth in Asia Pacific, driven by increases in our light vehicle end market, where we saw new OEM plant wins.
In addition, within North America, we saw a significant increase in commercial vehicle volumes during the quarter. These increases were largely offset by significantly lower light volume vehicle sales in Latin America. Light vehicle sales grew by, as I've mentioned before, 0.8% to $343 million, and commercial vehicle net sales grew by 13% to $103 million compared to the third quarter of 2013.
Adjusted EBITDA was $79.5 million, an increase of about 70% compared to the third quarter of 2013. This growth was driven by higher net sales and lower manufacturing cost, partially resulting from our operational improvement initiatives. Adjusted EBITDA margin expanded by 700 basis points to 17.8% compared to the third quarter of 2013.
If we turn to Slide 9, we wanted to update on our onetime transition-related costs. Since the acquisition of the business in February 2013, we've incurred a significant amount of transition-related costs to separate the business from DuPont and in particular, to stand up our information technology environment.
During the third quarter of 2014, these transition costs related -- transition-related costs amounted to approximately $49 million. These expenses, again, were primarily related to our information technology transition activities, but also included severance costs, some consulting fees and IPO expenses. Almost all of the transition-related costs are now behind us, and we expect them to be fully completed by the end of the fourth quarter of this year.
If you move to Slide 10 regarding debt and liquidity. Our balance sheet, cash flow generation and borrowing capacity provide us with the flexibility to fund our business and to invest for future growth. If we look at the balance sheet, cash and cash equivalents totaled $233 million as of September 30, 2014.
Total debt was $3,732,000,000 at the end of the third quarter, which resulted in a debt balance of approximately $3.5 billion -- a net debt balance of $3.5 billion. As you can see, our net leverage ratio has improved in every quarter since the acquisition, declining from 5.6x on a pro forma basis in January 2013 to 4.2x at September 30, 2014.
Lastly, we lowered our cash interest expense compared to the year-ago quarter, which was a result of refinancing our senior credit facility, which we completed in February 2014 and an additional step down in interest rates in the third quarter of 2014 on our term loans, which resulted from our improved leverage metrics.
That concludes our prepared remarks. Before we move in to Q&A, we would like to remind everybody again that, unfortunately, we remain in a 25-day mandatory quiet period following our IPO. So we ask that any questions be limited to our historical results, in particular, the third quarter. We do plan to provide 2015 guidance early next year, and we are currently in the process of finalizing our 2015 budget. And after we've done so early in the first quarter of next year, we will be providing guidance on 2015.
And with that, operator, would you please open up the line for questions?