Cellulose Insulation in Kensington, MD

Cellulose is the right material for most of Kensington. For the Victorian and Craftsman homes that define the Kensington Historic District — homes with plaster-on-lath walls, original windows, and irregular framing that no other material handles as gracefully — dense-pack cellulose is the only honest answer for wall retrofits. For the surrounding mid-century stock in Rock Creek Hills and along Connecticut Avenue, cellulose is the cost-effective, sound-damping, environmentally responsible choice for both walls and attics.

Dense-Pack Cellulose for Plaster-Walled Victorians

Dense-pack cellulose is the gold standard for retrofitting walls in pre-1940 homes. Our crews drill 2-inch holes through the exterior siding (typically wood lap or cedar shingle on Kensington Victorians), blow cellulose at 3.5 pounds per cubic foot until cavities are completely filled and air-sealed against settling, then patch and seal each hole. Interior plaster, original trim, and historic windows are never touched. The material conforms perfectly to the irregular framing and unsheathed wall cavities common in 1890s-1920s construction. Most Kensington Victorian wall packages can be dense-packed in a single day, with an immediate end to drafty exterior walls and cold corners.

Blown Cellulose Over Attic Air Sealing

For Kensington attics, cellulose is the cost-effective choice for high R-values. Our standard process is comprehensive air sealing first — every top plate, every can light, every plumbing penetration, every chase — followed by blown cellulose to R-49. Cellulose specifically is right for older attics because it conforms to irregular framing, fills around old knob-and-tube wiring boxes (where present), and has the lowest embodied carbon of any common insulation. We document the air sealing with photos and provide all rebate paperwork for Pepco EmPOWER Maryland and federal IRS Section 25C tax credits.

Why Cellulose for Historic Kensington

Cellulose is made from recycled newsprint treated with borates for fire and pest resistance. It has the highest recycled content of any common insulation, the lowest embodied carbon, proven performance in the field for decades, and a 5 to 8 STC point sound improvement over batts in the same wall cavity. For Kensington's historic stock, dense-pack cellulose adds R-value, stops air leakage, dampens road and rail noise, and meets every documented preservation standard for non-invasive wall retrofits.