PELLA &#8212 Pella Corporation has announced that it has acquired EFCO, a Missouri-based maker of storefront windows.

Pella, Iowa’s largest window manufacturer, makes commercial window and door products, but its focus is primarily residential construction.

EFCO, which makes aluminum-clad store front windows, glass curtain walls and other products for commercial buildings, has about 1,600 employees at its plant in Monett, Mo. It will retain its brand name as a unit of Pella.

The addition of EFCO will increase Pella’s employment to more than 10,600. Terms of the deal were not disclosed.