ROOFING
VM ZINC® Batten Seam

What is batten seam?

This is a traditional technique involving timber battens and capping strips. The zinc sheets and long zinc strips are held in place by a zinc batten clip supporting the peripheral upstands. The capping strips are placed in position by overlapping, thus ensuring that the roof is water tight.

This technique creates an impression of strong, conspicuous contours and is often used for its shadow effects and urban character.

Areas of application

Pitched roofs with slopes from 5% (3°) or more.

New construction or renovation - all shapes / straight, curved, domes, etc.

Cold or warm roof - low to middle hygrometry - for other types of building, please consult VM ZINC® Australia.

Panel Dimensions

670 mm Sheet Batten Centre to centre distances (CTC)	650mm for 40mm Batten
	640 for 50 mm Batten
500 mm Sheet Batten Centre to centre distances (CTC)	480 mm for 40 mm Batten
	470 for 50 mm Batten

Aspects

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

What is VM ZINC PLUS®? VM ZINC PLUSŽ is VM ZINCŽ 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 PLUSŽ products, like natural VM ZINCŽ, can be bent, folded or profiled without any surface change thus allowing the use of identical installation methods to natural.
4.	No need to ventilate the underside of VM ZINC PLUS®.

Characteristics of this technique

A timber batten, 40 mm or 50 mm in height and trapezoidal or rectangular in shape, is fixed with nails or screws onto the timber decking.
The zinc sheets and long zinc strips are held in place by a zinc batten clip supporting the peripheral upstands.
The capping strips, in lengths of 1 m, are placed in position by overlapping. They are fixed at the top by nailing a special clip which secures the upper end of the panel while at the same time allowing it to expand freely.
The technique is extremely adaptable to complex shapes and roof penetrations

Creates an expression of strong, conspicuous contours, often sought after by architects for its shadow effects and urban character

Requires only a simple hand folding tool to install

19mm plywood ventilated by a 40 mm ventilation air gap. Air inlet and air outlet are required at the ridge and at the eaves.

A slip sheet (i.e. Tyveck) is placed on the plywood to avoid abrasion with the Plus layer.

Components	Dimensions
Thickness	0.7 mm
Maximum Panel width (CTC) Center to Center distance	650 mm with 40 mm Battens
Minimum pitch	5°
Maximum Panel length	13 m

Installation

1	A timber batten 40 mm or 50 mm in height and trapezoidal in shape is fixed with nails or screws onto the 19 mm plywood decking. The batten clips are fixed under the battens during the installation of the battens.
2	Anti abrasive building paper (i.e. Tyveck) is applied to protect the zinc plus coating.
3	The zinc sheets are held in place by zinc clips supporting the peripheral upstands. Upstand height is 35 mm and 45 mm for 40 mm and 50 mm battens.
4	Fold down the batten clips by hand.
5	The capping strip, one meter long, is placed in position by overlapping.
6	It is fixed at the top by nailing a special clip which secures the upper end of the panel while at the same time allowing expansion.