Home - About Us About Us Dennison Trailers has been building high quality trailers for over 50 years, with a passion for engineering excellence, continuous product development and the highest standards of customer service. At our modern factories in Naas in Ireland and Lancaster UK, we manufacture skeletals, curtainsiders, tippers, platforms, machinery carriers and drawbar trailers – and a range of specialist trailers, including the innovative sliding bogie. Still a family owned and run business, we started in Northern Ireland in 1964, manufacturing trailers (our first trailer is still in existence and kept as a museum piece), moving to a site just outside Dublin in 1970. In 1983, we opened our current manufacturing plant in Naas and six years later, to serve the UK market, opened a manufacturing plant in Lancaster, UK. Today, Dennison Trailers is a market leading manufacturer of semi-trailers, with customers throughout Ireland and Britain and a healthy export market. For an overview of our trailer range, click here to download our latest Trailer Guide. Modern Slavery Policy Dennison Trailers believe modern-day slavery and abuses of human rights are abhorrent and will not condone any such activity either directly or within our supply chain. Our full statement can be downloaded here.