Historic building renovations require materials that preserve structural integrity. Our 2 rigid foam board insulation panels (4kg/m³ density) enable attic/wall retrofits without reinforcing foundations. The 1-inch insulation board variant fits into 1940s cavity walls, improving energy efficiency by 55% while maintaining breathability. Contractors report 60% faster installation versus batt insulation - our pre-cut sheet insulation boards snap together without specialized tools. For landmark projects, we offer custom-sized sound insulation panels matching original architectural profiles. Over 200 heritage sites across Europe use our reversible isolation board systems to meet modern thermal regulations invisibly.