Taking out the full frame was definitely the right choice for our house because we discovered hidden water damage behind the old casing. A simple slab swap would have just hidden that rotting subfloor until it became a massive repair bill down the road. Plus, modern pre-hung doors come with multi-point locks already integrated into the jamb, which makes the whole entry way feel so much sturdier. Keep an eye out for local installer discounts, like searching Best door company Vancouver — July promotions. to offset the labor cost. Getting the entire system replaced gives total peace of mind.