Roof and wall wraps

Thermoseal roof sarking combines the benefits of reflective thermal insulation with superior weather protection. Installed under your tiled or metal roof, Thermoseal provides reduced summer loads on your roof insulation and excellent protection against the elements.

What is Sarking?

Bradford Thermoseal roof sarking products combine the benefits of reflective thermal insulation with superior weather sealing protection. Installed under your tiled or metal roof, Thermoseal products contribute to reduced summer heat loads, allowing your ceiling insulation to work more effectively as well as providing a second skin to protect your home against wind driven rain and dust, as well as storm damage if the roof cladding is damaged.

The Bradford Thermoseal brand replaces the Enviroseal brand of non-permeable roof sarking insulation products referred to as ‘reflective foil laminates' or ‘sarking membranes'. These products are constructed of polymeric laminates* either with or without kraft paper substrates to assist in improving the smoothness of the foil surface. All of the Thermoseal products are developed and laminated in Australia using flame retardant adhesives to ensure that they are suitable for use in BAL rated bushfire regions. When combined with Bradford Gold ceiling batts, Thermoseal roof sarking products can improve thermal comfort in your home by reducing radiant heat transfer entering your home and reducing draughts which can adversely affect the efficiency of other insulation products.

Whether your application is in a hot or cold climate, roof spaces fitted with a reflective foil laminate product (such as a Thermoseal roof sarking product) benefit from controlled ventilation to assist in the removal of excess heat load in summer and moisture in winter.

Features and Benefits

The benefits of Thermoseal roof sarking once your home is completed:

• Protects your home from wind driven rain and dust ingress, creating a secondary protective skin in the event of storm damage;
• Reduces draughts entering the roof space, allowing ceiling insulation to work more effectively which ultimately improves the energy efficiency of your home;
• Contributes a reflective R-Value which improves the overall thermal insulation value of the roof structure when positioned adjacent to an air cavity (minimum 20mm);
• Provides compliance to BAL bush fire ember attack requirements in accordance AS3959 by providing a secondary form of ember protection for the roof space – all products comply with a flammability index of less than or equal to 5 when tested in accordance with AS1530.2.

The benefits of Thermoseal roof sarking as you build:

• Protects the building structure from the elements prior to the application of the roof tiles, which limits water damage to internal structural components;
• Improves on-site work flow efficiency by allowing some internal trades to commence work before the roof tiles are applied.

Thermoseal Reflective foil laminates are pliable, vapour barrier products that can provide an additional R-Value to a building system by using an air cavity (an air void in the building frame) to create an R-Value as part of the total wall construction. The type of wall construction, use of bulk insulation (wall batts) and the required air-gap R-Value from the wall wrap will determine the type of wall wrap that is suitable to the application.

Benefits once your house is built

• Protects your home from wind driven rain and dust ingress, creating a secondary protective skin in the event of storm damage to your roof;
• Reduces draughts entering the roof space, allowing insulation to work more effectively which ultimately improves the energy efficiency of your home;
• Contributes a reflective R-Value which improves the overall thermal insulation value of the roof structure when positioned adjacent to an air cavity;
• Provides compliance to BAL bush fire ember attack requirements in accordance AS3959 by providing a secondary form of ember protection for the roof space – all products comply with a flammability index of less than or equal to 5 when tested in accordance with AS1530.2.

Benefits during construction

• Protects the building structure from the elements prior to the application of the roof tiles, which limits water damage to internal structural components;
• Improves on-site work flow efficiency by allowing some internal trades to commence work before the roof tiles are applied.

Wall Wrap Selection Guide

As a general guide, reflective foil laminates require an air cavity adjacent to the reflective surface in order to generative an air-gap R-Value. Where the stud frame is filled with bulk insulation making contact with the wall wrap or the cavity between the wall wrap and the external cladding is eliminated, the wall wrap is unable to provide an air-gap R-Value.

As a result, it is important to select a wall wrap that has the reflective surface positioned on the correct side to contribute the desired thermal value in addition to the other protective benefits offered by the wrap.

Applications with bulk insulation: Where the stud frame is filled with bulk insulation making contact with the wall wrap and there is an air cavity (minimum 25mm) between the wall wrap and the external cladding, Thermoseal Wall Wrap XP is recommended. This innovative, patterned outward facing antiglare wall wrap relies upon the air gap between the frame and cladding to produce an air-gap R-Value, allowing the insulation batts to be positioned hard up against the inside face of the wrap. Alternative – Thermoseal Roof Metal Wall

Applications without bulk insulation: Where the stud frame is not filled with bulk insulation, the void in the frame can be used to generate an air-gap R-Value using Thermoseal Resiwrap or Thermoseal Wall Wrap.

Use of ‘breather' products: Where air transfer from each side of the membrane is required and ‘unclassified' water barrier properties are acceptable, Thermoseal Wall Breather is an available option. This product is not a vapour permeable product, but maybe a suitable option in some climate zones for specific construction types when specified by a qualified person.