Areco Aluminium Mega Vent - 350mm
Areco Aluminium Mega Roof Vent, manufactured using spun aluminium.
Top fixed to base with a self-tapping screw.
The area that can be effectively ventilated by a "Mega-Vent" is determined by the materials used in the construction of the roof.
- Designed expressly to meet the needs of the inverted roof can be used with asphalt or felt roofing
- Not for use with cross flow ventilation
Moisture is present in most roofs. A newly screeded concrete deck takes a long time to dry out thoroughly and when the deck is waterproofed, residual moisture from the screeded concrete is trapped with no means of escape. The installation of breather vents in the waterproofing layers of the roof allows this trapped moisture to escape, thus alleviating potential problems:
- Blisters in the asphalt or felt roof covering
- Expansion and contraction stress on the weathering membrane
- Subsequent ceiling level condensation
Where an existing roof covering has failed and moisture has penetrated the roof structure, breather vents should be installed with the replacement waterproof membrane (felt or asphalt). They will assist in clearing the excess moisture and continue to act in relieving vapour pressure, subsequently. Damp timber roof decks still require any repairs to be completed before re-roofing commences.
For felt roofs, the performance of the breather vent will be improved by the use of a proprietary partial bonded base layer or a vented felt. Both provide a better flow of vapour laden air to the breather vents.
Method of installation
A hole should be cut in the base layer and insulation. Place the vent base over the hole and dress subsequent layers of felt over the base and up the neck. The cap can then be secured to the base.
Place the vent base in position and trim sheathing felt around the base plate. Apply minimum two coats of asphalt over the box and dress around the neck of the vent. The vent cap can then be secured to the vent base.
Priming of the vent bases in contact with the waterproofing membrane is recommended.
|Compatible Roof Material(s)||Felt & asphalt|
|Diameter of Aperture at Base||165mm|
|Product Type||Breather vents|
|Ventilation Area||Determined by the materials used in the construction of the roof.|
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