Bi-Fold Windows

For a dramatic opening, ALTHERM bi-folds are hard to beat.

For a dramatic opening, ALTHERM bi-folds are hard to beat. They can be built in a range of configurations - all capable of stacking to one end of the frame.

The innovative lay-back bi-fold allows clear decks, with panels folding flat against walls. This option is available in 2-panel and 2+2 configurations. Our unique, bottom rolling bi-folds ensure the weight is being carried on the sill where it has maximum support, which makes moving panels easily glide.

Configurations