Authentic Masonite-brand siding was in 2001 and is no longer manufactured. If you need to repair or replace existing Masonite siding, your options are limited to sourcing salvaged old stock or purchasing modern engineered wood and fiber-cement alternatives designed to mimic its appearance. Where to Find Discontinued Masonite (Hardboard)
Since new production has ceased, you cannot buy official Masonite siding from standard retailers. You may find small quantities of original or "new old stock" through these channels: where to buy masonite siding
Local architectural salvage yards sometimes stock panels removed from older homes. Authentic Masonite-brand siding was in 2001 and is
Some local lumber yards may carry a limited supply of "tempered hardboard" or "bender board" that can be ripped down to match certain dimensions. where to buy masonite siding