Carriage style doors are generally all built on a base panel made of a 1" to 1 3/8" x 2 1/2" to 3" wood frame. High quality doors (Hahn Woodworking) make the frame out of a decay resistant hardwood (Meranti mahogany, etc.), medium quality doors (Designer Doors) use Douglas Fir, and the lower quality doors (Overhead) use hemlock. Designer doors makes two models A & B in order to better compete with the brands above and below. The basic frame is faced with with 1/4" plywood usually on both sides (Designer only on inside). The plywwod is often luan mahogany but some is "super-ply"(Designer) The best doors prime all sides of all components before assembly (Hahn) some only after assembly (Designer) and some only partially (Overhead). Wood styles and rails and T&G paneling are added to the outer face of this basic door unit. Hahn uses clear Spanish cedar full 1" thick styles & rails butted against 3/4" T&G paneling with biscuit glued joinery and face-grain wood plugs over recessed screws into the framing. They claim 200 screws per door. Each panel is assembled separately. Designer uses clear western red cedar 5/8" thick styles and rails over-laid on top of 9/16" thick T&G paneling with putty over recessed screws . The entire door is built and then cut into separate panels. Overhead uses clear western red cedar 3/4" thick and T&G paneling glued and blind nailed. The total thickness varies from 2 1/2" to 2 7/8". Of course the front edge of this door assembly aligns (in both directions) with the inside corner of the trimmed door opening so the tracks must be set to accommodate this thickness. Polystyrene foam board insulation fills the door panel cavities. Some doors use the extruded kind (Styrofoam) and some use the expanded type (white beadboard). R values range from 5 to 7.7 The more expensive custom doors (Hahn & Designer) will consider a 9'x8' high door to be a standard size. The cheaper doors usually consider 9'x7' high door to be standard. Some provide chain drive openers, others provide belt drive openers. Some use Chamberlain Co. but Overhead has their own brand. Some provide a 3/4 hp motor, others 1/2 hp. Some use overhead torsion springs, others extension springs along the rails. There are too many glass options to describe. Some use a heavier galvanized steel track. Some offer powder coated tracks. Designer has weep holes, the others don't. All of the doors are installed by the manufacturers or their authorized agents. I would guess the approximate cost of a 9'x8' door, installed, would range from $5,000 to $2,000 assuming decorative paneling and glass. These manufacturers use different details at the horizontal panel joints with differing degrees of overlap. I'll post the details if I ever find them. Of course the manufacturers may have changed their designs in the past two years.

Tinker, Just curious if you took the picture of the 2nd house( steel grey /blue shingle style house) Its a house I designed in Columbus /Dublin, Ohio so I was curious.. The doors look great with the house if I do say so myself. Designer doors does a great loooking door as well for those with a bit higher budget( Im sure but never have priced them)

This guy makes beautiful doors. Even if you don't order from him you have to look at the gallery. We considered ordering from him but we have to heat our garage, so I wanted the highest R value possible (we ended up going with insulated steel that has an R value of about 18). Here is a link that might be useful: Maine Doors

Assuming you are referring to the Ranch House collection by Overhead Door, we have had the series #147 for a couple of years now. The door is very nice and, as long as you apply stain once a year, not too difficult to maintain. However, in our area snow has built up outside of our door causing water to seep into the garage when it melted. As a result we recently purchased and installed plastic strips (will paint to match the trim color on the building) to seal around the top and sides of the door and prevent water seepage. Since they will blend in with the trim around the door, the strips won't noticably detract from the appearance of the door. We also had to relocate the hardware on the door because the sealing strips covered the ends of the metal faux hinges. We also replaced the thin rubber gasket on the bottom of the door with a p-trap type rubber seal and attached a rubber threshhold to the garage floor for good measure. We have the same type of sealing system around the steel doors on another garage, so I'm not suggesting the water problem is specific to wood doors. I just want you to know there may be gaps around your door once it is installed and, depending on your climate, you may have to install some type of seals to keep the weather out.