In addition to selling doors, the Marvin Doors company also sells windows as well as components needed to install windows. The company web page offers a lot of information regarding all their products.
Marvin doors and windows is the largest manufacturer of this type in the world. It has a very large variety of doors and windows that are made to order to satisfy all the clients needs. Therefore it is highly recommended to buy windows and doors from them.
The cost of using Marvin windows and doors depends on what size and number you plan to use. Consult marvin.com for rates.
Lowes does sell windows and doors. They do have a website and they have many of their models online that you may not be able to see in a store. The sale associates are very knowledgeable about the products as well.
You Tube is a great place to find how to videos on how to install doors and windows. However, installing doors and windows is a skilled trade and should only be done by professionals.
Marvin Windows and Doors is based in Minnesota, although they do ship and do business in all states in the U.S.A. They also have a large international business, offering their products in a number of different companies.
Pella is a manufacturer of high end windows and doors. You can find a selection of Pella windows, patio and entry doors, at Lowes Stores, Home Depot Stores, Norandex, and the Pella Showrooms.
Garage doors are not designed to have windows. You will need a more traditional barn type door on your garage for windows.
There are instructions on how to install all kinds of things from pet doors to windows at stores such as Home Depot, Lowe's, or Menard's. You can probably also find them online.
Measure Them
Your best bet to find a wooden door, whether it is pine, oak or even cherry, is to check out places such as lowes, home depot, or menards. They have extensive samples of doors and windows.
When looking to install electronic dog doors then it may be possible to find helpful installation process instructions on the internet. Such sites as Lowes offer information on the installation process of electric dog doors.