I went window shopping (literally). Found some windows that fit the existing openings on the back porch....... however, I assume that I really should "frame" openings and not just go with what fits now?
Ruby and I needed new windows on the back of our house. The 1970's windows that were there were aluminum frame, single pane glass that were energy inefficient. There were storm windows associated with them but I never put them on because the storm windows screwed into the wood frame and I didn't like that at all.
Come to find, my Son's Father in Law, Lee, is a Marvin Window Rep on the West coast. I was talking to Lee at my son's wedding and he said if I bought Anderson Windows, I was dead to him. So, I started looking at Marvin windows and they really are pretty good! Most window companies make a fiberglass frame now which is considered the "State of the Art."
If you want the least expensive window installation, then buy an "off the shelf" window from Lowes or HD and adjust your window opening to fit, but adjusting your window opening can be difficult and expensive. It may never look right either. Getting a custom window to fit your existing opening makes it easier to install but the custom windows can be pricey.
I was working in Alaska last summer so I paid a guy to install our Marvin Windows. I specified PVC brick mold on the outside to make these fiberglass windows totally weather proof. They fit perfect and I'm really happy with the install. We ended up getting the casement style windows with a crank to open them. Two reasons for this. Ruby liked the ease of opening the window with a crank but the other reason is probably more important. There is a code for bedrooms that is often overlooked even by professional window companies.
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Building Planning Codes
IRC Code Section R310
SECTION R310
EMERGENCY ESCAPE AND RESCUE OPENINGS
R310.1 Emergency escape and rescue required. Basements and every sleeping room shall have at least one operable emergency and rescue opening. Such opening shall open directly into a public street, public alley, yard or court. Where basements contain one or more sleeping rooms, emergency egress and rescue openings shall be required in each sleeping room, but shall not be required in adjoining areas of the basement. Where emergency escape and rescue openings are provided they shall have a sill height of not more than 44 inches (1118 mm) above the floor. Where a door opening having a threshold below the adjacent ground elevation serves as an emergency escape and rescue opening and is provided with a bulkhead enclosure, the bulkhead enclosure shall comply with Section R310.3. The net clear opening dimensions required by this section shall be obtained by the normal operation of the emergency escape and rescue opening from the inside. Emergency escape and rescue openings with a finished sill height below the adjacent ground elevation shall be provided with a window well in accordance with Section R310.2. Emergency escape
52 2006 INTERNATIONAL RESIDENTIAL CODE® and rescue openings shall open directly into a public way, or to a yard or court that opens to a public way.
Exception: Basements used only to house mechanical equipment and not exceeding total floor area of 200 square feet (18.58 m2).
R310.1.1 Minimum opening area. All
emergency escape and rescue openings shall have a minimum net clear opening of 5.7 square feet (0.530 m2).
Exception: Grade floor openings shall have a minimum net clear opening of 5 square feet (0.465 m2).
R310.1.2 Minimum opening height. The minimum net clear opening height shall be 24 inches (610 mm).
R310.1.3 Minimum opening width. The minimum net clear opening width shall be 20 inches (508 mm).
R310.1.4 Operational constraints. Emergency escape and rescue openings shall be operational from the inside of the room without the use of keys, tools or special knowledge.
R310.2 Window wells. The minimum horizontal area of the window well shall be 9 square feet (0.9 m2), with a minimum horizontal projection and width of 36 inches (914 mm). The area of the window well shall allow the emergency escape and rescue opening to be fully opened.
Exception: The ladder or steps required by SectionR310.2.1 shall be permitted to encroach a maximum of 6 inches (152 mm) into the required dimensions of the window well.
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A double hung window of the size we needed in our bedrooms wouldn't comply with this code even though the window companies (Anderson, Pella and Marvin) would all sell us double hung for the bedrooms. A casement or awning window will comply with the 5.7sq ft opening.