Vantage Series 548 bi-folding doors run smoothly because they carry all the weight on bottom rollers. In common with the best residential European systems, Series 548 has ruled out the use of top-hung doors.

Design Features

1. No Lintel Sag: There's no worry about the doors jamming up. Bi-folds that run on rollers at the sill don't pull the door lintel down and therefore they work smoothly over the long haul.

2. Robust & Forgiving: Because Series 548 bi-folds have good clearance at the top they can cope with up to 6mm of lintel movement without a problem. Top-hung systems have very little leeway, once they start 'playing
up' they can be hard to fix.

3. European Feature: Virtually all recent, residential bi-fold door systems in Europe are bottom rolling for two reasons - to ensure that heavy panels (for example, with double-glazing) can operate easily, and to eliminate the need for wide bulky transoms above doors with overlights.

4. No Bulky Transoms: Where overlights are included above top-hung doors the transom needs to be large and deep to support
the top track and the overlights. By contrast, the Series 548 bi-fold transom has a narrow profile. This allows a designer to
include 2100mm-high doors plus an overlight in a standard 2400mm-high opening. (Opening sashes as well as fixed overlights are
available).

5. Assured Water Drainage: Series 548 sill design means that bi-fold doors have a very deep water 'head' at the bottom. The
bigger this measurement - from drainage hole to the inside leg - the more assured the water drainage in wet or stormy
conditions.

6. Bi-fold Windows: Are also available to match this door system, refer section 38.

7. Extra Wide Rails: The Vantage Series 548 high performance Bi-fold door features an unusual design embellishment - extra wide top and bottom rails that give the door the chunky appearance of traditional timber designs. This flies in the face of an economy - driven approach to joinery design. This strength of appearance is also backed up by true structural integrity. Vantage Series 548 doors feature a thoughtful but invisible innovation - specially designed compression blocks at the four corner joints of the door. These take the "sloppiness" out of corner joints and make sure that the door stays rigid and square. Compare our door with others available and you will see what we mean about strength and rigidity.

8. Custom Hardware: The centre hinge between door panels has built-in handle to allow home owner to easily pull the panels
back into the closed position. The hinging panels are held in the closed position by heavy duty flush bolts top and bottom.
No ugly shims and packers under the keeper and or hinges as we use custom injection moulded lock keepers, flush bolt blocks
and flush bolt guides. Optional custom 'Miro' lever operated flushbolt or key operated bolts.

9. Opening Panels: Bi-fold panels can be fitted with ClearVENT™ sashless double-hung panels, refer section 27.

10. WERS (Window Energy Rated System) tables are in section 04. Sound reduction ratings can be found in section 55.