Type BR door from Bilco is designed for installation on sloped sidewalls of brick, stone, block or poured concrete, which are generally found on older homes throughout the country. For these homes, basement door replacement can often be more challenging than newer homes with an areaway surface that is flat or at grade level. The BR Sloped Wall door simplifies sizing and installation. The Type BR basement door is designed with a flat frame that can simply be placed on top of the sidewalls and positioned as required to accommodate the areaway opening dimensions. The door is available in 3 standard sizes and extension panels and foundation plates are available to accommodate virtually any areaway dimension. Color: Red Primer. Material: Steel.