shaft material alternatives
 
SOLID SHAFT  
The primary function of light shafts is to channel the light made available by the skylight into the living areas throughout the void of the ceiling space. The materials used for shafts are varied depending on the details of the installation, geographic location, climate, availability and cost of materials and aesthetic considerations.

To optimise the amount of light entering the living space the duct material should be of high
reflectivity. All the shaft materials in common use have advantages and disadvantages,
the table below will provide information for your understanding and selection.
INSTALLATION  
The light well can be of rectangular section or to optimise the light distribution my flare out towards the ceiling level. The rafter location dictates generally the positioning of the Skylight and this provides the starting point. The correct choice of location and sizing of skylight to suit existing building elements Will result in saving of work and cost.

The positioning of the opening in the ceiling should consider symmetry, desired location, with consideration for lights and ceiling fans. Mark location and check for plumbing, electrical wires and air conditioning ducts.

The light well may be constructed of Gel Coated Plywood, Pre-finished lining Boards, Particle Board or Plaster Board, Metal Sheeting is not recommended as condensation may form with a change in temperature. If using Gel Coated Plywood or Pre-finished Lining Boards framing may be required depending on light well size. Fix pre-finished sheet with liquid nails in preference to nails or screws. Where nails or screws are necessary, use galvanised, paint to match lining board.

To support diffuser at ceiling level the opening should be cut in ceiling 15mm smaller than internal size of light well and trimmed with casing bead forming a ready made seating for diffuser panel. Alternatively painted timber trim batten or T-Rail may be fitted.

Connect to Regent Skylight of your choice.



Refer to accessories brochure for details about diffuser, ceiling trim and fan kits.
CAUTION: Structurally adequate trimmers or other supporting members must be provided when cutting rafters or ceiling joists.

MATERIAL ADVANTAGES DISADVANTAGES
Painted Plasterboard Readily available, no condensation problem.
Can be fire rated.		 Difficult to finish off in confined space of shaft.
Indifferent reflectivity, expensive
Painted building board Readily available, inexpensive, no condensation problem. Indifferent reflectivity
Painted particleboard Readily available, inexpensive, no condensation problem. Indifferent reflectivity
Not suitable in damp areas
Pre-finished melamine 
face waterproof ply		 Readily available, inexpensive, no condensation problem.
Good reflectivity
Flexible light shaft Readily available, inexpensive, no condensation problem.
Best reflectivity.
Can save structural work by bypassing obstructions.		 Must be used with a diffuser for aesthetic 
considerations.
Pre-coated steel Readily available, inexpensive.
Good reflectivity		 Can produce condensation problem in coastal 
and humid areas and in rooms heated with fuel 
fire.
Aggravates heat problem by re-radiating into room
Natural timber Readily available, no condensation problem.
Attractive
 Poor reflectivity
Splayed shaft is expensive


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The product described herein is protected by one or more of the following:
Australian Patent Nos 688444, 686419 and 712432:
Australian Registered Design Nos 127024, 118780 and 107995.

The skylight system illustrations contained in this brochure are the sole property of Regent Skylight Systems Pty. Ltd. and are reserved under copyright law. It is the responsibility of the user to ensure that the selected skylight system complies with the relevant building codes and authorities requirements. Regent Skylight Systems Pty. Ltd. reserves the right to improve or modify the skylight systems at any time.

Zincalume® and Colorbond® are registered trademarks of BHP Steel (JLA) Pty Ltd. Corrolux® is a registered trademark of Thomas Deutsch (Regent Sheet Metal Pty Ltd)