VENT-A-ROOF®

Introduction

VENT-A-ROOF® is the latest technology in roof ventilation for Fielders® steel roofs. VENT-A-ROOF® is a cost-effective, architecturally attractive solution for:

  • Commercial buildings
  • Light Industrial buildings
  • Residential homes
  • Sheds

VENT-A-ROOF® is a non-mechanical continuously operating, waterproof, cyclone-rated, metal roof ventilation system that provides a condensation management solution. Managing roof cavity condensation mitigates mould issues and contributes to improved health and safety in buildings across Australia.

Benefits of a VENT-A-ROOF®

  • Improves roof ventilation with continuous airflow, reducing both roof space temperature and energy costs associated with cooling the building
  • Full roof ventilation is made possible with both ridge and hip vents
  • Mitigates condensation, humidity and mould
  • Australian wind, bushfire and cyclone rated
  • Cost-effective and integrated into the roof providing a low profile attractive alternative to ventilators
  • Keep cooler in summer and remove condensation in winter
  • Certified for use in BAL 12.5 – 40 regions to prevent ember ingress at ridge and hips
  • Certified for use in cyclonic regions
  • DTC solution for 2019 NCC condensation management and roof ventilation requirements

How the system works

Figure 1.1

This deceptively simple passive system allows fresh outside air to be taken into the roof space either through soffit/eave vents or in through the system itself. This cooler air rises from these intake points and mixes within the ceiling or building space to create a natural flow of air that leaves the hot air escaping through the top of the ridge/skillion.

Simultaneously, external breezes provide a positive airflow which crosses over the ridge of the house creating negative pressure which pulls air out from the ridge vent. Effectively, two thermal effects create a continuous flow of air, allowing cool air into the roof/building space whilst extracting hot air.

This information is a guide to the design and installation of the VENT-A-ROOF® system for steel roofing and walling manufactured by Fielders®. We intend that it be used by all trades and professions involved with specifying and applying the VENT-A-ROOF® range of products.

We refer only to genuine steel roofing and walling manufactured by us and marketed under our brand names. Our recommendations should only be used for our products because they are based on comprehensive testing of our profiles, base metal thicknesses (BMT) and material finishes. More general design in installation with regard to steel cladding may be found in the Fielders® Roofing and Walling Installation Manual. This manual covers a range of topics not covered in this installation.

This information has been prepared for the VENT-A-ROOF® system for roofing applications using components manufactured or supplied by Fielders®.

Whilst this information primarily deals with VENT-A-ROOF® in roofing applications the principles apply equally to walling applications. For specific walling advise speak with your local Fielders® branch. VENT-A-ROOF® louvres are not recommended for use at wall bases where they may be subjected to constant moisture.

This page covers installation procedures for both new and retro fit applications in both non-cyclonic and cyclonic applications.

All erection and connection details are to be made in accordance with the relevant standard connection details contained in this page. We recommend you get professional advice to ensure your particular needs are adequately met.

To ensure maximum lifespan of your building, consult your nearest Fielders® branch for information regarding maintenance, handling, storage and any other technical assistance you may require.

Further information on products and service

Visit our website contact page  for your local supplier of Fielders® products.

Design Preliminaries

Materials and finishes

VENT-A-ROOF® components and Fielders® cladding and flashings are manufactured from Australian made BlueScope steel.

Material specifications

VENT-A-ROOF® steel vent components are manufactured from 0.4mm BMT aluminium/zinc/magnesium alloy coated steel.

Fielders® steel cladding and flashings are available in a range of materials and finishes including

  • Next generation ZINCALUME® aluminium/zinc/magnesium alloy coated steel complying with AS 1397:2011 G300, AM125 125g/m2 minimum coating mass.
  • COLORBOND® steel is pre-painted steel for exterior roofing and walling. It is the most widely used. The painting complies with AS/NZS 2728:2013 and the steel base is an aluminium/zinc alloy-coated steel complying with AS 1397:2011. Minimum coating mass is AM100 (100g/m2).
  • COLORBOND® Metallic steel is pre-painted steel for superior aesthetic qualities displaying a metallic sheen.
  • COLORBOND® Ultra steel is pre-painted steel for severe coastal or industrial environments (generally within about 100m - 200m of the source). The painting complies with AS/NZS 2728:2013 and the steel base is an aluminium/zinc alloy-coated steel complying with AS 1397:2011. Minimum coating mass is AM150 (150g/m2).
  • VENT-A-ROOF® louvres are not recommended for use with COLORBOND® Stainless steel

NCC roof space ventilation requirement V ventilation performance

Volume 1 of the National Construction Code (NCC) covering class 2-9 buildings (Non-Residential) outlines requirements for ventilation of roof spaces at;

Section F - Heath and amenity, Part F6 - Condensation management Performance requirements, Clause F6.4 – Ventilation of roof spaces (extract at Figure 2:1).

Similarly, Volume 2 of the NCC covering class 1 & 10 buildings (Residential) outlines ventilation of roof spaces at;

Section 3 - Acceptable Construction, Part 3.8 - Health and Amenity, Part 3.8.7 - Condensation Management, Clause 3.8.7.4 - Ventilation of roof spaces.

Roof ventilation requirements for both Residential and non-Residential buildings are similar in that where an exhaust system from a kitchen, bathroom sanitary compartment or laundry discharges into a roof space that roof space must be ventilated to outdoor air through evenly distributed openings.

The required ventilation openings must have a total unobstructed area of:

  • For roof pitch of greater than > 22 degrees - an unobstructed area of 1/300 of the ceiling area.
  • For roof pitch of less than < 22 degrees - an unobstructed area of 1/150 of the ceiling area.
  • At least 30% of the total unobstructed area must be located not more that 900mm below the ridge/hip with the remaining required area provided by eave vents.
Figure 2.1:

NCC Volume 1 Extract

F6.3 Flow Rate and discharge of exhaust systems
a) An exhaust system installed in a kitchen, bathroom, sanitary compartment or laundry must have a minimum flow rate of:
1.  25 L/s for a bathroom or sanitary compartment;
2.  and 40 L/s for a kitchen or laundry
b) Exhaust from a kitchen must be discharged directly or via a shaft or duct to outdoor air
c) Exhaust from a bathroom, sanitary compartment, or laundry must be discharged:
1.  directly or via a shaft or duct to outdoor air; or
2.  to a roof space that is ventilated in accordance with F6.4.

F6.4 Ventilation of roof spaces
a) Where an exhaust system covered by F6.3 discharges directly or via a shaft or duct into a roof space, the roof space must be ventilated to outdoor air through evenly distributed openings.
b) Openings required by a) must have a total unobstructed area of 1/300 of the respective ceiling area if the roof pitch is greater than 22˚, or 1/150 of the respective ceiling area if the roof pitch is less than or equal to 22˚.
c) 30% of the total unobstructed area required by b) must be located not more than 900 mm below the ridge or highest point of the roof space, measured vertically, with the remaining required area provided by eave vents.

NCC residential Deemed-to-Satisfy Ventilation requirements (with eave vents) for Whirlybirds or VENT-A-ROOF®

Linear metres of VENT-A-ROOF® required
Roof pitchCeiling area (m2)No. of 300mm diameter whirlybirdsNo. of 400mm x 200mm eave ventsSkillion ridge ventilation (lm)Gable/hip
ventilation (lm)
≤22°100372211
125492714
1505103216
1755123719
2006144322
2257154824
2508175327
2758195829
3009206432
32510226935
35010247437
40012278543
>22°10024116
12525147
15035168
175361910
200372211
225482412
250492714
2754102915
3005103216
3255113518
3505123719
4006144320
NCC residential Deemed-to-Satisfy Ventilation requirements (with eave vents) for Whirlybirds or VENT-A-ROOF® provides a ready reckoner for a Deemed to Comply solution for both whirlybirds and VENT-A-ROOF® in both skillion and gable/ hip roof configurations utilising eave vents as part of the ventilation solution.

NCC residential Deemed-to-Satisfy Ventilation requirements (without eave vents) for Whirlybirds or VENT-A-ROOF®

Linear metres of VENT-A-ROOF® required
(No Eave Vents)
Roof pitchCeiling area (m2)No. of 300mm
diameter
whirlybirds
Skillion ridge ventilationGable/hip ventilation
≤22°100107136
125128844
1501510653
1751712362
2001914171
2252215879
2502417688
2752619397
30029211106
32531228114
35033248123
40038281141
>22°10053618
12564422
15085327
17596231
200107136
225117940
250128844
275139749
3001510653
3251611457
3501712362
4001914171
NCC residential Deemed-to-Satisfy Ventilation requirements (without eave vents) for Whirlybirds or VENT-A-ROOF® provides a similar a Deemed to Comply solution for both whirlybirds and VENT-A-ROOF® in both skillion and gable/hip roof configurations where eave vents are unable to form part of the ventilation solution.

For residential buildings outside of the m2 range in the above tables, the calculation example below maybe used.

Calculation example for a “typical” residential building with bathrooms and kitchen exhaust vans venting into roof space.

House ceiling m2 = 250m2

Roof pitch = 22.5 degrees

Therefore,

250m2 ceiling area x requirement > 22 degree roof pitch i.e. 1/300 (0.003) = 0.833m2 of ventilated opening. This may be split 30/70 between ridge and eave vents

Therefore,

0.833m2 x 30% = 0.250m2 ridge vent

0.833m2 x 70% = 0.583m2 eave vents

Ventilation capacities

  • 1m of VENT-A-ROOF® ridge provides 0.019008m2 of unobstructed area for ventilation.
  • Generally, a 300mm dia whirlybird (WB) provides an unobstructed area for ventilation of 0.07m2 ea.
  • A 400mm x 200mm eave vent (EV) will provide 0.08m2 of unobstructed area for ventilation.

Airflow Calculations

Single storey houseWind
Pressure
Pa
Wind speedExternal
air temp
differential
to attic space
air temp
(degrees
Celsius
300mm whirlybirdlm VENT-A-ROOF®
louvre skillion ridge
(with 45-50mm throat
dimension)
lm
VENT-A-ROOF® louvre
Gable/ Hip Ridge
(2m of louvre)
(with 45-50mm throat
dimension)
lm
VENT-A-ROOF®
louvre skillion ridge =
1x300mm whirlybird
lm
VENT-A-ROOF® louvre
gable/hip ridge
(2m of louvre)
km/hKnotsAirflow
(m3/s)
Heat
Extraction
(kW
Airflow
(m3/s)
Heat
Extraction
(kW
Airflow
(m3/s)
Heat
Extraction
(kW
Airflow
(m3/s)
Heat
Extraction
(kW
Airflow
(m3/s)
Heat
Extraction
(kW
00060.0190.1370.0060.0460.0130.091331.51.5
120.0200.2880.0070.0960.0130.092331.51.5
180.0210.4540.0070.1510.0140.302331.51.5
400.0221.0560.0070.3520.0150.704331.51.5
2.063.260.0290.2060.010.0690.0190.138331.51.5
120.0300.4290.010.1430.0200.286331.51.5
180.0310.6770.010.2260.0210.451331.51.5
3.684.360.0340.2470.0110.0820.0230.165331.51.5
120.0350.50.0120.1670.0230.333331.51.5
180.0360.7870.0120.2620.0240.524331.51.5
8.0126.560.0510.370.0170.1230.0340.246331.51.5
120.0520.7530.0170.2510.0350.502331.51.5
180.0531.1370.0180.3790.0350.758331.51.5
12.5158.160.0600.4320.020.1440.0400.288331.51.5
120.0600.8710.020.290.0400.58331.51.5
180.0611.3240.020.4410.0410.882331.51.5
14.2168.660.0630.4560.0210.1520.0420.304331.51.5
120.0650.9350.0220.3120.0430.623331.51.5
• Airflows represented for 0 km/h (Knots) wind speed are entirely due to convection.
• Increasing wind speeds will cool a sunlit roof hence reductions in attic v ambient temperatures for higher wind speeds.
• Bolded text represents default Australian design pressure of 12.5 Pa.

Airflow capacity/air exchange calculation example for a "typical" light industrial shed

Shed Dimensions

Length50m
Width                                                             18m
Wall height at eave                                      3m
Roof pitch                                                      5 degrees
Roof Apex height                                         3.790m
Wind speed Default design pressure       12.5pa or 8.1knots
External v internal air temp                       12 degrees – warm day

Calculation
Step 1 – Shed Air Volume

  • Air volume of shed = (50m x 18m x 3m) + (50m x 9m x 0.790m) = 2700 + 355.5 = 3055.5m3

Step 2 – Air Extraction RateFrom

  • Table 3 we can see that the Airflow/Air Extraction Rate per metre of louvre at the ridge given a 12 degree external to internal temperature variation and 8.1knts of wind = 0.040m3/s

Step 3 – Air Volume Extracted per Hour

  • 0.040m3/s per metre of louvre

50m building length = 2m3/secondx

60 seconds = 120m3/minx

60 minutes = 7200m3/hr

Step 4 – Air Exchange Rate

  • Shed air volume = 3055.5m3
  • Volume extracted per hour = 7200m3

Therefore:
3055.5m3 divided by 7200m3/hr airflow provides for complete shed air changeover every .424 hours or every 25 minutes from the VENT-A-ROOF® system alone.
In practice, additional air changeover will occur via doorways, windows, shed wall to roof junctions etc.

 

VENT-A-ROOF® BAL (Bushfire Attack Level) performance

All new residential construction in Australia must undergo a BAL (Bushfire Attack Level) assessment as part of the building application process.
Properties are assessed against 6 Bushfire Attack Levels as outlined in the table below

Bushfire Attack Levels

Bushfire Attack Level (BAL)BAL zone description
BAL LowThere is insufficient risk to warrant specific construction requirements
BAL – 12.5Ember attack. (BAL 12.5 Construction Requirements) i.e. Non-combustible coverings roof/wall junction sealed.
Openings fitted with non-combustible ember guards. Roof to be fully sarked
BAL – 19Increasing levels of ember attack and burning debris ignited by windborne embers, together with increasing
heat flux. (BAL 19 Construction Requirements)
i.e. Non-combustible coverings roof/wall junction sealed. Openings fitted with non-combustible ember guards.
Roof to be fully sarked
BAL – 29Increasing levels of ember attack and burning debris ignited by windborne embers, together with increasing
heat flux. (BAL 29 Construction Requirements)
i.e. Non-combustible coverings roof/wall junction sealed. Openings fitted with non-combustible ember guards.
Roof to be fully sarked
BAL – 40Increasing levels of ember attack and burning debris ignited by windborne embers, together with increasing
heat flux and with the increased likelihood of exposure to flames. (BAL 40 Construction Requirements)
i.e. Non-combustible coverings roof/wall junction sealed. Openings fitted with non-combustible ember guards.
Roof to be fully sarked and no roof mounted evaporative coolers
BAL – FZDirect exposure to flames from fire, in addition to heat flux and ember attack. (BAL FZ Construction Requirements)
i.e. Roof with FRL of 30/30/30 or tested bushfire resistance to AS1530.8.2. Roof/wall junction sealed. Openings
fitted with non-combustible ember guards. No roof mounted evaporative coolers

VENT-A-ROOF® has been independently assessed as suitable ridge and hip treatment to prevent ember ingress for BAL-12.5 – BAL – 40 zones

Fielders® steel cladding and ancillary products combustibility status are outlined in NCC compliance documents located at https://specifying.fielders.com.au/roofing-walling/design-data/statement-of-compliance-for-fielders-roofing-walling-and-rainwater-goods/

 

VENT-A-ROOF® cyclonic performance

Air leakage testing conducted at Farabaugh Engineering and Testing, show that VENT-A-ROOF® assists pressure equalisation between internal and external pressures. Testing results as shown in the below table, demonstrate that a greater volume of air “escapes” through the VENT- A-ROOF® system than what is let in, an approximate 8% difference. The results show that as the test pressure increases, the rate of air escaping through the VENT-A-ROOF® system increases.

NB Test results Infiltration = air exiting the roof cavity and Exfiltration = air entering the roof cavity. (Nielson, 2019)

Test Pressure

InfiltrationExfiltrationRatio (%)
Test Pressure
(Psf)
Test Pressure
(Pa)
Air leakage
rate (Cfm)
Air leakage
rate (m3/s)
Air leakage
rate (Cfm)
Air leakage
rate (m3/s)
InfiltrationExfiltrationDifference (m3/s)
1.5775.17440.02076568837.50.01769802954%46%0.003067658
6.24298.7786.10.04063467574.50.03516008554%46%0.00547459

Based on these results, it is determined that installation of the VENT-A-ROOF® system to ridgeline areas of metal clad roofing to residential and commercial properties, will reduce internal pressures and as such reduce structural loads to these structures during cyclonic and high wind events. (Nielson, 2019)

VENT-A-ROOF® has been independently assessed and certified as suitable for use in cyclonic regions when affixed in accordance with the VENT-A-ROOF® Design and Installation Guide for cyclonic regions.

Installation - New Installations

Step 1 - Roof Sheeting Installation

Install Fielders® S-Rib™, Fielders® TL-5™ or Fielders® KingKlip®700 sheeting in accordance with installation details available on this website.
Critical dimensions for roof ridge batten position and ridge throat dimensions are shown at Figure 3.1.1.

Figure 3.1.1

Fielders® Roll Top Ridge

Dimensions (mm)
BattenSheetThroatRidge
Apex ridge to toe of
batten
Sheet
overhang
top of batten
Sheet to
sheet
Ridge legs
15˚22.5˚25˚ToeStep/RaisePan
StateABCEFG
NSW1751651609560-5517.525106
VIC1751701659055-5017.525102
TAS1751701659055-5017.525102
SA1651551509130-17122291
WA1701601559550-45202599
Figure 3.1.2

Fielders® Folded Ridge

Dimensions (mm)
BattenSheetThroatRidge
Apex ridge to toe of
batten
Sheet
overhang
top of batten
Sheet to
sheet
Ridge legsFeed
width
15˚22.5˚25˚ToeStep/RaisePan
RegionABCEFG(mm)
Non cyclonic1801751709555-652225150400
Cyclonic20520019595100-110222517545
Figure 3.1.3

Fielders® Folded Ridge (Commercial applications)

Dimensions (mm)
BattenSheetThroatRidge
Apex ridge to purlin
edge
Sheet overhang top of PurlinSheet to
sheet
Ridge barge legsFeed
width
15˚15˚ToeStep/RaisePan
ApplicationABCEFG(mm)
Commercial/Industrial17395110140-1802225200500
Figure 3.1.4

Skillion Roof Ridge/Apron

Dimensions (mm)
BattenSheetThroatRidge Barge/Apron
Apex ridge to toe of
batten
Sheet overhang
top of batten
Sheet to
sheet
Ridge barge legs
15˚22.5˚25˚ToeStep/RaisePanWall side
RegionABCEFGH
Non cyclonic1901851809540-35252515075
Cyclonic2402352309590-85252520075

It is important that a consistent line is maintained at the ridge line of sheeting as per the dimensions noted in Figure 3.1.1-3.1.4 and the above tables as appropriate. Do not screw fix the ridge line of roof sheets. Sheet pans should not be turned up.

Step 2 - Begin VENT-A-ROOF® louvre install

Looking at ridge or hip line, begin the installation of VENT-A-ROOF® louvres from left to right.

For hipped roofs where only ridge potions of the roof are to be vented, start installation of the VENT-A-ROOF® louvres at the crown point of the roof.

Step 3 - Slide louvre over sheet

Slide VENT-A-ROOF® louvre over the end of metal sheet.

Step 4 -  Fix louvre to sheet

At the left end of louvre, apply enough pressure that the metal sheeting embeds a minimum of 3mm into the foam. To hold louvre into place, install one screw (10-16 x 16mm Teks® screw minimum class 3 coating) through the top of louvre into the rib of sheeting.

 

 

 

 

Continue installing the louvre from left to right screwing the top line of the louvre first. Ensure the louvre is pulled tight when installing the 10-16 x16mm Teks® screws so that the sheet is embedded a minimum of 3mm into the foam.

 

 

 

 

 

 

 

 

 

Finish screw placement through the louvre. Screws are to be installed as per screw pattern shown at Louvre fixing screw pattern - Cyclonic and Non Cyclonic applications table. Install full sealant bead to the end of louvre and foam.

 

 

 

 

 

Step 5 - Add additional louvres

Slide next length of louvre at an angle overlapping and insert it into the crimped end of the installed louvre, making sure the sealant and foam make good contact to ensure a weather-tight seal.

 

 

 

 

 

 

While fitting the louvre against previous louvre, ensure that the foam is in place and against metal sheeting. Screw in place as done in Steps 3 - 5.

Continue along the ridge, repeating Steps 3 - 5.

 

 

 

 

 

Step 6 - Install ridge cap

Install ridge cap in accordance to AS 1562.1 using screws recommended at Specifying.Fielders.com.au Screws should penetrate ridge, VENT-A-ROOF® louvre, roof sheet and batten below providing fixing to both roof ridge and ridge cap.

No scribing is required with VENT-A-ROOF® louvre, due to the closed cell weather tight foam within the VENT-A-ROOF® louvre.

For applications where only the ridge portion of the roof is utilising VENT-A-ROOF® the VENT-A-ROOF® ridge will sit 25mm above the hips caps. This will allow the VENT-A-ROOF® roll top ridge to neatly marry to the hip roll top ridge as shown in Figure 3.6.1.

Please note that for South Australian applications utilising roll top ridge that some pressure is required to “spread” the roll top ridge to cover the VENT-A-ROOF® louvres and maintain ridge throat dimension.

Hip install

The same principles apply to installation of hips with critical dimensions being identical.

 

 

Figure 3.6.1

Screw pattern

Cyclonic and Non Cyclonic

Louvre fixing screw pattern - Cyclonic and Non Cyclonic applications

Fielders®
Sheet TypeS-Rib™TL-5™ KingKlip®700Screw
Recommended spacing of VENT-A-ROOF® fixing screws1st and last sheet rib10 - 16 x
16mm Teks®
then every 4th ribthen every 2nd ribthen every rib
Distance from front/bottom edge of VENT-A-ROOF® louvre60mm
Distance from top edge of VENT-A-ROOF® louvre25mm
Fixing spacing at VENT-A-ROOF® jointsBoth sides of join
Spacing of ridge cap fixing screwsEvery 2nd ribEvery ribEvery ribAs per Fielders®
published
data for roof
sheeting
for cyclonic applications cyclonic zips should be used for
ridge cap fixing screws

 

 

 

Installation - Retro-Fit

The vast majority of Australia’s existing residential and light commercial and industrial buildings do not comply with the current NCC specification for roof ventilation.
Installation of a VENT-A-ROOF® system to an existing building can provide immediate benefits to health and amenity of the building by improving condensation management and reducing thermal loads within the roof space and thus living space.

Step 1 - Determine replacement ridge flashing dimensions

Remove a small number of screws from a portion of the exist ridge to allow measurement from the ridge screw line (and mid-line of existing batten) to the top of the existing sheets.

Compare the measured dimensions with those in Table 6 to determine if roll top ridge or a special folded ridge is required.

Measure and order ridge lengths and VENT-A-ROOF® louvres.

Step 2 - Remove existing ridge

Remove the portion of the existing ridge to be replaced by the VENT-A-ROOF® system to expose the ridge throat.

Step 3 - Mark roof sheets to be cut

From the calculations determined in Step 1 mark each end of the ridge to be cut. Using a chalk line ping a line across the ridge in preparation to cut the sheets back.

 

Step 4 - Cut back the sheets

Using a cold cut steel saw, excalibur shears or similar cut back the roof sheets and cut back any insulation or sarking to reveal throat gap.

Step 5 – Install VENT-A-ROOF® louvres

Start laying VENT-A-ROOF® louvres, left to right, as per 3.2 through to 3.10 of new installation instructions following appropriate screw patterns.

Step 6 – Install new ridge flashings

Following guidelines from 3.10 cut and screw fix new ridge flashings to vented ridge.

Step  7 – Clean up

Clean all debris from roof paying particular attention to swarf from cutting of sheets and screw installation.

Step 8 – Install eave vents

Install 400mm x 200mm eave vents, if required, in accordance with manufacturer’s instructions.

 

 

 

 

 

 

 

Warranties

Fielders® operations have been servicing Australia’s residential, industrial and commercial construction industries for over 115 years. Fielders® unique and innovative products, first class engineering and testing resources as well as a strong commitment to quality customer service and support make them leaders in metal roll-forming manufacture and supply.

Our products are engineered to perform according to our specifications only if they are used in the appropriate conditions and installed to the recommendations in this information and our other publications.

Naturally, the warranties require specifiers and installers to exercise due care in how the products are applied and installed and are subject to final use and installation. Also, owners need to maintain the finished work. The VENT-A-ROOF® system will not negatively impact warranties applicable to Fielders® products.

We invite you to ask about the warranties applicable to your proposed purchase, at your supplier of Fielders® products.

Appendices

FORM 15 – BAL-12.5 – 40

 

FORM 15 Australian wind regions A 1-7, B, C & D

 

JCE A150 - Letter of advice - VENT-A-ROOF® product

 

Performance test summary TAS-100A on EZ VENT-N-CLOSURE for VENT-A-ROOF®

 

Performance test report ASTM E283 leakage test on metal roof vent for VENT-A-ROOF®

Conditions of use

If you use this information, you acknowledge and agree that your use is subject to the terms and conditions in this information. Fielders®, its agents, officers, employees, sub-contractors or consultants make no representations, either expressed or implied, as to the suitability of the information and data in this page for your particular purposes.
It’s your responsibility to ensure the design you use is appropriate for your needs, the products you have purchased, your site and structural limitations and your building and construction capabilities.

This information endeavours to present information on products, details, installation and practices in a clearly prescribed manner and it is the user’s responsibility to apply the information in the way intended. If there is any uncertainty then it is the user’s responsibility to seek clarification.

Where we recommend use of third-party materials, ensure you check the qualities and capabilities of those products with the relevant manufacturer before use.

Use of genuine materials

Structures in this information should only be built or constructed using genuine Fielders® or recommended third party products. Except as otherwise provided in these terms, any warranties only apply to you (if at all) if you use the recommended genuine Fielders® or third-party products and method of construction.

Check delivery

It is important that you check all materials delivered to site against your invoice before you use them in your building or construction to ensure all components have arrived, are of the appropriate quality and are ready for installation.