The smell of death can be quite strong and pervasive, but whether it permeates normal painted drywall depends on several factors. Drywall is a porous material, and if there is a source of strong odors nearby, such as a decomposing animal or other biological matter, the smell can potentially penetrate the drywall.
However, if the death occurred in a different area or if measures were taken to contain and remove the source of the smell, the odor may not permeate the drywall. Painted surfaces can provide some level of barrier and help reduce the odor's penetration, especially if the paint is of good quality and properly applied.
It's important to note that if a strong and persistent smell of death is present in your home, it's recommended to investigate the cause thoroughly. There could be underlying issues such as hidden animal carcasses, mold, or other sources of organic decay that need to be addressed.
If you encounter a situation where the smell of death is present and you suspect it has permeated the drywall, it may be necessary to take more extensive measures to eliminate the odor. This can involve removing and replacing affected drywall, treating the area with specialized odor-neutralizing products, or consulting with professionals who specialize in odor removal.
In any case, addressing the source of the odor is crucial to effectively eliminate the smell.