What is the proper way to install a 2nd layer off plywood over my plywood subfloor? | DIY Home Improvement Forum
![DIY house Reno. This home was built in 1949, pre plywood. Should I rip out this subfloor and replace with plywood? Or just screw down existing floor to the joists using floor DIY house Reno. This home was built in 1949, pre plywood. Should I rip out this subfloor and replace with plywood? Or just screw down existing floor to the joists using floor](https://preview.redd.it/khmc9zos0np81.jpg?auto=webp&s=c73df2d80d794a477725b425df0b878ef85050ff)
DIY house Reno. This home was built in 1949, pre plywood. Should I rip out this subfloor and replace with plywood? Or just screw down existing floor to the joists using floor
![QUIK DRIVE BY SIMPSON STRONG TIE #9 x 3-in Yellow Zinc Strong-Drive WSV Subfloor Interior Wood Screws (500-Per Box) in the Wood Screws department at Lowes.com QUIK DRIVE BY SIMPSON STRONG TIE #9 x 3-in Yellow Zinc Strong-Drive WSV Subfloor Interior Wood Screws (500-Per Box) in the Wood Screws department at Lowes.com](https://mobileimages.lowes.com/productimages/af3d91d6-a8c4-4090-918b-53ca84f9be4c/17876101.jpg?size=pdhism)
QUIK DRIVE BY SIMPSON STRONG TIE #9 x 3-in Yellow Zinc Strong-Drive WSV Subfloor Interior Wood Screws (500-Per Box) in the Wood Screws department at Lowes.com
![Type of screws needed to reinforce subfloor? (installing, glue, build) - House -remodeling, decorating, construction, energy use, kitchen, bathroom, bedroom, building, rooms - Page 2 - City-Data Forum Type of screws needed to reinforce subfloor? (installing, glue, build) - House -remodeling, decorating, construction, energy use, kitchen, bathroom, bedroom, building, rooms - Page 2 - City-Data Forum](https://www.city-data.com/forum/attachments/house/179347d1483590236-type-screws-needed-reinforce-subfloor-image.jpeg)