Sometimes brand new windows on a custom home leak. It can be due to manufacturer defect, improper installation, leaking mull bars (the aluminum bar that joins two windows together) or improper caulking. It's important to test windows before a homeowner moves in.
Of course, the installation of the window must be done properly but sometimes even when that's perfect, windows leak. Brand new windows right from the manufacturer and installed by their local distributor.
Vertical mull bars are very likely to leak on new windows. It's the bar that joins two windows together side by side. The horizontal ones are more water tight.
I'm convinced after 30+ years of building homes behind me, every window on a new home must be checked for leaks. I would much rather deal with a leaking window, roof, door or sliding glass door prior to my Homeowner moving in than after, when personal belonging may be at risk.
Of course, the installation of the window must be done properly but sometimes even when that's perfect, windows leak. Brand new windows right from the manufacturer and installed by their local distributor.
Vertical mull bars are very likely to leak on new windows. It's the bar that joins two windows together side by side. The horizontal ones are more water tight.
I'm convinced after 30+ years of building homes behind me, every window on a new home must be checked for leaks. I would much rather deal with a leaking window, roof, door or sliding glass door prior to my Homeowner moving in than after, when personal belonging may be at risk.
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