Wild West Window Installation

Wild West Window Installation – How To Install A Vinyl Window

Now you may think you know how to install a window. Chances are… you don’t. You might be asking yourself; “Why would this guy know more than I do?”. Trust me, most installers who have been installing windows for 20 years have no idea how to properly install a window. Yeah right! What makes you such an expert? Well to start with I’m a Certified Window Installer. I was until a few months ago the Inspector for the Siding and Window Dealers Association of Canada in Calgary. I was often referred to as “the Association’s best inspector” I don’t know if that was true, but I heard it many times. The reason I left the association was that I was unhappy that the Association would not enforce their own rules, making my work useless. I started building houses in 1982 and have built all the windows and doors in my own house out of oak. I know windows.

Manufacturers sell windows with nailing fins. These nailing fins are commonly used to hold the window in place without any other support. As I have described in a previous article, this is wrong. There’s a very important document titled CSA A440.4-07. This is the correct method of installing a window. Now, it’s 114 pages long and I’m not going to try to cover everything in this article. Is it required by the Building Code? Yes, at least in Alberta and I suspect everywhere else in Canada. Article Environmental Separation of the Alberta Code lists this CSA Standard. The Standard itself states that it is supplemental to any Manufacturers’ Installation Instructions. That means that whatever the manufacturers’ instructions are, you still have to comply with this Standard. Are Installers complying with the Standard? No. I estimate that more than 90% of the windows installed do not comply with the Standard. That includes new homes and renovations. So if you’ve just had windows installed, chances are they’re installed wrong. If the odds were that good in Vegas, my money would be on the table.

“My widows work fine! They look great and the Installer cleaned up nicely when he was done. What’s the difference?” The difference is durability. If you were to put new windows in your house the bill would probably exceed $10,000. 00, larger houses would be more. How long would you like those windows to last? If the window is not supported properly, the window will sag and shift. Most windows today are made of vinyl, the vinyl will only take so much stress. As the window sags, the frame will crack, or the glass may break. Recently, I inspected a new home. I opened a casement window and found that I could not close it. The frame had sagged and the window no longer fit the frame. This was brand new! I thought that the window could be re-installed, but after talking to the Manufacturer’s Rep. I learned that the window could not be salvaged and would have to be replaced. The Manufacturer was supplying the window free of charge to the Builder, because they didn’t want to lose the Builder as a customer. If widows are not installed properly they will fail prematurely, how prematurely will depend on how badly they were installed.

As I stated earlier, I can’t hope to give you everything in the 114 page document that is CSA A440.4-07. I’m going to try to narrow it down. Most widows are vinyl, most windows are sliders and most window replacements are complete tear outs rather than installed inside the old frame. This should be fairly manageable. There are differences with different materials and types of window, so don’t try to extrapolate.

Step 1: Ordering Your Windows

Take off the casings (moldings) surrounding the windows. If you think you can measure the window without taking the casing off, you are wrong. You have no instalator sanitar idea what the previous installer did. The existing window could be too large and is forced in or too small. I know of one young renovator who got stuck with the task of installing windows that his dad ordered. Dad didn’t measure very well and all the windows were too big for the rough openings. He couldn’t return them. If it wasn’t his dad he could have just said no. The thought of that job makes me cringe. Measure the diagonals and make sure the rough opening is square. You want the new windows to be approximately 1 inch smaller in both dimensions than the rough opening. That will give you approximately ½” all around the window for shims. If the openings are not square, as determined by measuring the diagonals, you might want to make the windows a little smaller, because you want the window square. The supplier will want to know if the wall is 2×6 or 2×4. You’ll also want to decide if you want a “brick molding” or not on the exterior. You’ll have to figure out how big the brick molding should be and compare that to what is available from the manufacturer, and adjust from there. If you want my opinion order the windows without a nailing fin.

Step 2: Removal of the Old Windows

Once the new windows arrive, inspect them. First check the new windows and make sure there is no damage and that they are the right size. You don’t want to find that out once you’ve removed the old window.

The idea here is to remove the old windows with as little damage to the house as possible. That means you have to put the sledge hammer away. Cut any caulking, that way it won’t be a problem, and it can be a problem. If you can find fasteners, remove them. Sometimes there are nails through the brick molding or screws through the frame or nails in the nailing fin. You’ll only find the nailing fin if you remove the trim or siding around the window. If you are dealing with stucco or synthetic stucco and there is no trim around the window, cut the fin off and leave the fin there. Once you’ve removed all the fasteners you can find, it’s time to remove the old window. Again, no sledge hammer. The window will probably be difficult to move, but it should be loose everywhere. You can use a hacksaw blade to run around the window, there may be some fasteners that you were not able to find. You can use a reciprocating saw to cut any fasteners in the gap, but do it gently. Remove the sashes (operating windows) and try to remove the fixed panes without breaking them. I usually use a small pry bar with a wide blade. If the window won’t just slide out with some gentle tapping, I usually cut through the bottom of the frame around the middle and pry the two halves up. I can usually remove the other frame pieces easily from there. Try to put as little stress on the building as possible.

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