I’d skip fiberglass — feels flimsy, stains fast, and once it dulls, it’s done.If you’re feeling fancy or want that “forever” tub, cast iron is bulletproof — just heavy as sin.

Fiber glass tub for a few hundred more are light and will last longer.

I’m 23 years old and currently own a business specializing in fiberglass and gelcoat boat repairs, but I am looking to transition into a new career path.

I'm not sure about steel doors, but the exterior grade fiberglass doors come pre-hung with a threshold. 

Worth have insulation requirements, and for example on old homes built with 2x4, probably have to do spray foam insulation vs red fiberglass bating. 

Hi,How to use steam cleaner on creamy fiberglass tub.

Iron is better, but fiberglass is fine too. $100 at Home Depot.

I am not a fan of fiberglass products.

., fiberglass/acrylic or a new cast iron tub if budget allows).Let us know what you decide and how it turns out.

Another effective option is a removable acoustic door plug—essentially a thick, custom-cut foam or dense fiberglass "cork" that compresses into the door frame to seal off sound when not in use.