The idea of mulling and installing windows yourself may have some appeal to the enthusiastic DIYer, but according to Jeff Silverhus, Senior Product Manager at Marvin, there is little to be gained by taking the DIY route. “You’d definitely need to know what you are doing, even for a simple, standard two-wide casement assembly,” he said. “But even then, I’d always recommend having it professionally installed.”
“In addition to the technical details of joining and installing the window units, applying sealant, and trimming the mulled intersection, the sheer weight of even a small assembly would require additional help. Handling the window units would be dangerous without the right equipment and experience,” he added.