Why Factory Installed Windows ...
Why factory installed windows? To add value and quality while saving money.
As most production and custom builders know, the windows can be the biggest single cause of callbacks and customer dissatisfaction. Whether it is leaks, missing screens, malfunctioning parts or poor installation, windows can create a negative impression well beyond their cost.
If your wall panel partner is doing the most to add value and save site problems, he will be offering window installation in the factory. This approach adds more value and greater quality to the panel, allows installation and flashing in a controlled environment and dramatically speeds up the completion of the home. The most significant advantages start with:
Rough Openings - if your panel manufacturer uses a highly automated system, rough openings should be true to within millimeters of tolerance. Ensuring a dimensionally correct and true opening in which to install the windows is something that often is not the case in the field. Properly done, no shims should be necessary, thus eliminating another source of potential error.
Kiln Dried or Engineered Headers, Studs, Trimmer, Sills and Cripples - the best possible results will be realized by using KD or engineered (LSL/LVL/GLB) for material for all parts of the window (and door) components. This will ensure accurate openings and will eliminate the change of dimension, shape and square that is experienced with green lumber. In addition, the space required around the window in the opening may be smaller (based on the window manufacturer’s recommendations), leaving less room for the potential air or water penetration intrusion.
Controlled Environment for Flashing and Installation - by installing the windows in the factory, far greater quality control is possible with consistency. Installers are not required to repeatedly climb ladders or scaffolds, and most windows can be installed with a window placement devise that ensures true and square installations. This combines robotics and vacuum lift technology to place windows within millimeters of the desired set and square. This approach allows the installer to start with an accurate opening and a properly placed window from the beginning. The flashing can be done to AIA guidelines, manufacture requirements or the builder’s preference, in a dry, controlled, dust-free environment allowing the installed membranes to adhere, set and cure well prior to any exposure to the environment, moisture or harsher weather.
Less Costly - the actual cost of the window installation should be less, if installed by the panel manufacturer. This is a function of the speed and controlled environment in the factory, as well as the fact that no installer needs to leave the ground. In addition, fewer workers and less job-site trade coordination is required as the machines should do much of the installation work.
Fewer Call Backs - the greater quality of the window, installation and surrounding materials should greatly reduce call backs and buyer dissatisfaction.
There are a few things that you need to be sure your panel manufacturer does for you to ensure a successful window program:
- Ship the panels with windows vertically. Be sure the screens arrive later, and preferably are installed by your panel manufacturer.
- All site work related to the install or repair, except where specifically called out in your supply contract, should be done by panel or window manufacturer personnel. The manufacturer should ensure that all windows function properly after panel placement. This should optimally be done at the time of screen installation.
- It is very important that window manufacturers’ warranties are arranged so that they flow through to your home buyer!
If you follow these few rules, a significant advantage can be delivered on your next project, whether you are building production housing or a custom home.
June 2007 Builder Architect Edition Issue
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