b'Combining Two or More WindowsA mulled unit is the combining of 2 or 3 (or more)units into one opening. Replacement windows can be mulled side by side (a picture window flanked bydouble hung on each side or two double hungs), orstacked on top of each other (a transom over a double hung or a picture window over an awningwindow). The most common mulled units are side by side.Window units can be joined together, and theninstalled as a combo unit. These units can be joinedside by side.Structural mulling enables the units to be joinedside by siade or stacked. The mulls are anchoredthen to the opening frame.Basically, windows can be placed together in multiple units into any opening.In fact, the sameinstallation procedures (blindstop installation orother techniques) will still apply. Mulled units, inessence, become a single unit that will install andmount similarly to single units. The mull systemseffectively seal the joint.How to Join with "H" MullsIf you desire to mull two or more units, order windows to include an H mullion for each joint and a continuous head expander, and sill angle long enough to fit the entire width of mulled unit.Window Fitters Guide to Window Installation772020 AWDI, LLC Do not reproduce without permission'