On the other hand, any per-unit retain certificate (other than capital stock) which is redeemable only in the discretion of the cooperative association, or which is otherwise subject to conditions beyond the control of the patron, shall be considered not to have any fair market value at the time of its issue, unless it is clearly established to the contrary.
Composition roof lifeAsphalt shingles are rated at 20, 25, 30, or 35 years. The average roof life is 5 to 10 years less, depending on climate conditions in your area. The life of any asphalt shingle roof is effected if Algae and Mildew is allowed to grow on it.
Your house. The aforementioned Study of Life Expectancy of Home Components report states that a typical roof made of asphalt shingles should last about 20 years. Roofs made of fiber cement shingles should last 25 years, and roofs made of wood shakes are typically good for 30 years. If you have a roof made of slate, copper, clay or concrete, you can expect it to last 50 years. The foundation and frame of your house should last a lifetime if they were properly built. And while the walls should also last the lifetime of the house, aluminum windows are only expected to hang around for 15 to 20 years. Wooden windows should last as long as 30 years. Your garage door opener won't have as lucky of a fate, however. Expect it to last 10 to 15 years.