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.

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

Characteristics of this technique

Zinc plus is installed on minimum thickness 19mm plywood over a breathable anti abrasive building paper
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.

Surface aspects: QUARTZ-ZINC in Zinc plus / ANTHRA-ZINC in Zinc plus / PIGMENTO in Zinc plus

What is Zinc plus? 

Zinc plus is VMZINC coated on the underside with a protective layer (VMZINC patent).

Allows the use of an incompatible roof deck.
Zinc plus products can be bent, folded or profiled without any surface change (similar to VMZINC products) and thus allow the exact methods of laying.

670 mm Sheet Batten Centre to centre distances (CTC)	650 mm for 40 mm 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

(*) Weight of the system /sq. m excluding framework.

	Traditional system widely used throughout the Europe, Batten seam is used on 65% of Paris roofs.
	The technique is extremely adaptable to complex shapes and roof penetrations,
	High wind resistance,
	Fast and easy installation making it a cost effective solution. Requires only a simple hand folding tool to install

All types of roofs.
All shapes: flat, curved, concave, convex, conical, domes.
Pitches: Minimum pitch 3° (5%).

Support

The support must be:

19 mm plywood rigid and continuous, with a minimum 40 mm ventilation cavity that is unobstructed
Meet loading requirements in conformity with a minim um pull out strength of 50 daN for each clip.
Rest on at least 3 bearing structure elements.
Have no protruding elements.

	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.
	Anti abrasive building paper (i.e. Tyvek) is applied to protect the Zinc plus coating.
	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.
	Fold down the batten clips by hand.
	The capping strip, one meter long, is placed in position by overlapping.
	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.