ROOFING
Double Lock Standing Seam (DLSS)

Key advantages:
1.	Flexibility: adapts to almost any architectural design
2.	Design: discreet joints (25mm)
3.	Performance and waterproofing: maximum water and wind resistance
4.	Easy and cost-effective installation: use of profiling and seaming machines, optimisation of metal consumption
5.	Offers architects the freedom in their designs thanks its numerous possibilities of roof shapes

What is standing seam ?

The standing seam system is a roof and façade covering system. It allows long strips of profiled VM ZINC® to be assembled by forming double folds on the upstands. The sheets of VM ZINC® are laid on continuous decking and anchored using concealed fixing clips.

Areas of application

Roofs with a pitch from 3° to vertical.

Classes of internal humidity load: 1 to 4.

Both renovations and new buildings, residential or commercial building.

Aspects

QUARTZ-ZINC® PLUS ANTHRA-ZINC® PLUS	0.7 or 0.8 mm thick
PIGMENTO® PLUS	0.7 mm thick

What is VM ZINC PLUS®? VM ZINC PLUS® is VM ZINC® coated on the underside with a protective layer (Umicore patent).
1.	Surface appearances available : QUARTZ-ZINC® PLUS, and ANTHRA-ZINC® PLUS.
2.	Allows the use of an incompatible roof deck.
3.	VM ZINC PLUS® products can be bent, folded or profiled without any surface change (similar to VM ZINC® products) and thus allow the exact methods of laying.
4.	No need to ventilate the underside of VM ZINC PLUS®.

Characteristics of this technique

VM ZINC® is installed on a minimum 19 plywood, and a roof underlay and breather membrane.
A 40 mm continuous air gap must be left clear beneath the plywood, on all roof pitches.
Continuous ventilation openings are made at the top and bottom.

Installation

Stages to install VM Double lock standing seam:

1	Laying the panel on the structure: Lay the panel on the structure. The L profile of the preceding panel and the clips that have been fastened to the panel and fixed to the structure are covered by the U of the next panel, avoiding stresses and lateral traction.
2	Installation of clips. Number of clips for roofing (depends on the climate zone - contact us for further information)