AUSTRALIAN DESIGNED MADE AND OWNED INVENTED 1992
|
PRODUCTION CEASED PERMANENTLY
(as of August 2020)
*very limited stocks of RENSHADE available in random lengths from Wren Industries
*RENSHADE is formally sold under licence through ECOMASTER 1300-326627 www.ecomaster.com.au
NOTE
*Trademark names of “CONCERTINA FOIL BATTS” & “RENSHADE” remain held by Wren Industries
BUILDING ENERGY EFFICIENCY CONSULTANCY SERVICES
$100 per hour
TIMELINE 1952-2019
Key discussion issues
- Building heat flow dynamics – for residential and commercial buildings
- Thermally effective insulation materials relevant to climatic location – for buildings, and cooling and heating appliances
- Differences between reflective foil and bulk insulations
- Aluminium foil insulation been used in Australia since 1952
- International thermal testing methods for bulk insulations have never accounted for high temperature impact, e.g. 50-70degC roof spaces
- House Energy Ratings: 5-6-7 Star ratings are not validated by physical house testing, 6 Star was officially not recommended, in 2009
- Limits to insulation levels, i.e. Law of Diminishing Benefits is never discussed by the Insulation Industry or regulations
- Airconditioning ductwork bulk insulation materials, frequently underperform fail in hot roof spaces
- Insulation Industry is driven to sell thicker insulation, i.e. ‘thicker is better’ is a straight out lie, and against established scientific facts
- Building Codes & Standards refuse to address ‘heat stress resilience’ in housing,
- Building Codes & Standards refuse to institute national condensation and mould research, when specifically advised to do so in 2016
- Failure of Standards Australia to adopt ‘greater public participation and transparency’, as recommended in Technical Governance Review 2018
- Insulation Industry, regulators, standards, and advisers refuse to engage in transparent public discussion about residential building energy efficiency.
|
REDUCE AIR-CONDITIONING & POWER BILLS |
FOIL BATT FACTS-1
Failures of air-conditioning ductwork insulation
in hot roof
spaces,
and foil solutions to rafters and around cooling ductwork
DOWNLOAD HERE |
Little Girl Story
We don't wear overcoats in summer, so why use
bulk insulation in hot climates?
LETTER: 200 units in QLD with fibreglass batts, some made hotter
VIEW HERE |
FACTS-10
Roof Space Installation Photograph Examples
DOWNLOAD HERE
|
SPEECH in Federal Parliament Tim Wilson MHR 16 Oct 2017
Household contributions for reducing total energy demand
Aluminium foil insulation for radiant heat control of airconditioning ducts
VIEW HERE
|
FACTS-13
Physics diagram – High Reflection & Low Emission
DOWNLOAD HERE
|
AIRAH (Australian Institute of Refrigeration,
Air Conditioning & Heating)
Technical Handbook 2013 - Radiant heat barriers needed for all of Australia
Page 47: DOWNLOAD HERE
Page 163: DOWNLOAD HERE
Tim Renouf – PROFILE “Ecolibrium” magazine – Sept 2016
DOWNLOAD HERE
|
FACTS-14
Do You Live In a Hot House? – Thermal Testing Tables
DOWNLOAD HERE
|
National Energy Efficient Building Project (Pitt & Sherry) 2014
Multiple radiant heat barriers in ventilated roofs, and no
bulk insulation, works well in the tropics
DOWNLOAD HERE
|
GREEN Magazine (Jan/Feb 2013)
Keeping the house cool
DOWNLOAD HERE
|
A framework for adaptation of Australian households to heat waves (Univ SA) 2013
Reduce cooling demand for existing dwellings –
modify roofs, adding reflective foil
DOWNLOAD HERE
|
|
CEILINGS
- PITCHED ROOFS |
|
Combination insulation system - DUAL WINTER AND SUMMER CLIMATES
FOIL BATTS simply laid over fibrous insulation (33deg
tested R value) maintaining concertina
air spaces.
NOT STAPLED in ceilings – deemed to be electrically safe (conclusions from 2014 Royal Commission – Home Insulation Program)
Do not pull tight. Dust is of little importance on top surface - bottom triangular
foil airspaces emit or re-radiate approx 3%
of all summer heat.
Ceiling
temperatures reduced by approx 5-10 deg, depending on thickness of
existing insulation.
Extra R Value = approx R1.0 down/summer, R0.5 up/winter.
Extreme radiant heat from roof is stopped,creating comfort in the rooms below, and reduces air conditioning running costs. |
|
|
JOISTS VISIBLE |
JOISTS COVERED |
|
Laid direct on ceilings in triangular profile for dominant summer climates.
Two FOIL BATTS, in triangular profile, one on ceiling, the other on top of joists provides maximum heat flow down summer benefit.
|
|
|
CEILINGS
- FLAT OR CATHEDRAL ROOFS |
|
Use two FOIL BATTS stapled between rafters plus foil under
metal roofs - Approx total R4 down/summer
R2 up/winter.
Bottom
layer can rest on ceiling battens, maintaining 3%
low emitting foil airspace.
Extreme radiant heat from roof is stopped.
Do NOT use bulk
insulations in narrow cavities = rapid summer
heat transfer and 40% R value reduction. |
|
|
|
ROOF SPACES & AIRCONDITIONING DUCTWORK |
|
*BEST TIME TO INSTALL IN ROOFS IS DURING COOLER MONTHS*
ROOF RAFTERS @ 900mm CENTRES – NO EXISTING FOIL SARKING |
|
Staple PACK STRAP tight to underside of roof rafters, spaced approx 600mm apart, acting as support device for FOIL BATTS
Staple two 1350x450 size FOIL BATTS clipped together, using a small office stapler.
Staple double FOIL BATTS to sides of 900 roof rafters, overlapped approx 50mm
Unique foil retrofit radiant heat barrier, and easiest installation technique
450 rafters = one 1350x450 FOIL BATT, 600 rafters = one 1350x600 FOIL BATT |
|
|
WALLS |
|
FLOORS |
|
New
and existing floors - overlapped and stapled to joists with min
50mm airspace = Total R3.0
97%
radiant heat flow down - reflected back to maintain warmer floor
temperature
Create still air above and below FOIL BATT. Enclosed perimeter walls (eg brick veneer or shade cloth behind base boards). Open perimeter walls - use floor joist underlining
Joist
tops clear for gluing and cramping of flooring & easier than draping foil or supporting fibre batts with chicken wire
Unstable base for nesting of rats and rodents, ie other insulations can support vermin
Perforated
FOIL BATTS allows
floors to drain moisture from rain. Retrofit for existing floors do not need perforation holes. Breathing of timbers occurs through unsealed overlaps. Recommended for use by Timber Promotion Council (VIC).
100% waterproof lamination bonding process. |
|
|
|
CONCERTINA FOIL BATTS FOR FLOORS
PERFORATED FOR DRAINAGE FROM RAIN
|
EASY TO RETROFIT UNDER
EXISTING FLOORS |
|
|
|
LIGHTWEIGHT - COMPACT - EASY TO TRANSPORT & STORE
|
|
|
THIS IS WHY RADIANT HEAT BARRIER INSULATIONS ARE NEEDED
USE CONCERTINA FOIL BATS IN ROOF SPACES AND
RENSHADE ON WINDOWS & OUTSIDE ROOFING |
ABN 35 053 019 202
Unit 5, 19 Abbott St,
SANDRINGHAM
VICTORIA 3191
*President
AFICA - Aluminium Foil Insulation Council of Australia Inc (est 2019)
www.afica.org.au |
|
|
|
|
|
|