January 24 - 30, 2021: Issue 480
How To Keep Your Home Cool During A Heatwave
Living beside the sea in a place that has worked to retain its tree canopy has its advantages during the hotter weeks of the year. Just as an umbrella will shield you from blazing sun, a tree will absorb those hot rays and provide shade to keep cooler those hot tin rooves.
This week a few tips to keep things cooler around and inside the home.
If you live in an area with restricted air flow due to surrounding buildings, lots of concrete or other hard surfaces that creates radiant heat, or have a lack of trees or green breaks, the outside temperature may be hotter than that inside your home and your street may be hotter by as much as 3-4 degrees than one facing that cool ocean.
In that case you may be better shutting up your home during the hotter part of the day, drawing curtains and installing ceiling fans to create air movement. However, if your home does not have adequate insulation to keep out heat, and there is no breeze whatsoever, an air-conditioner in one room and closing off the others until a sea breeze occurs is going to be your best option for comfort and reducing energy costs. You could also shade outdoor areas around the house with plantings and shade structures to lower the ground temperature and in turn the temperature of incoming air. Even a shade cloth or large market umbrella over hotter areas will reduce the temperature being radiated against your home's walls and then inside your home.
There are also many ways you can cool your home through what is termed passive (non-mechanical) cooling, as well as hybrid approaches which utilise mechanical cooling systems. Passive cooling is the least expensive means of cooling a home in both financial and environmental terms.
- shading windows, walls and roofs from direct solar radiation
- using lighter coloured roofs to reflect heat
- using insulation and buffer zones to minimise conducted and radiated heat gains
- making selective or limited use of thermal mass to avoid storing daytime heat gains.
Evaporative cooling by installing water features
As water evaporates it draws large amounts of heat from surrounding air. Evaporation is therefore an effective passive cooling method, although it works best when relative humidity is lower (70% or less during hottest periods) as the air has a greater capacity to take up water vapour.
Pools, ponds and water features immediately outside windows or in courtyards can pre-cool air entering the house. Carefully located water features can create convective breezes. The surface area of water exposed to moving air is also important. Fountains, mist sprays and waterfalls can increase evaporation rates. A previous DIY Ideas page on how to install water features is archived below.
Open Design to Maximise Natural Ventilation
Heat enters and leaves a home through the roof, walls, windows and floor, collectively referred to as the building envelope.
- Maximise the indoor−outdoor relationship and provide outdoor living spaces that are screened, shaded and rain protected.
- Maximise convective ventilation with high level windows and ceiling or roof space vents.
As those living in Pittwater know that cooling sea breeze is going to run inland from the east and south (southerlies), make sure you have windows facing in those directions that can be opened to allow cool air to replace hot air within a home. Opening a window on the opposite side will allow air to be drawn through the home.
In rooms where it is not possible to place windows in opposite or adjacent walls for cross-ventilation, place projecting fins on the windward side to create positive and negative pressure to draw breezes through the room.
Insulation is critical to passive cooling — particularly to the roof and floor. Windows are often left open to take advantage of natural cooling and walls are easily shaded; roofs, however, are difficult to shade, and floors are a source of constant heat gain through conduction and convection, with only limited cooling contribution to offset it.
In climates that require only cooling or those with limited cooling needs, use multiple layers of reflective foil insulation in the roof instead of bulk insulation to reduce radiant daytime heat gains while maximising night-time heat loss through conduction and convection. This is known as the one-way insulation valve.
Reflective foil insulation is less affected by condensation and is highly suited to cooling climate applications as it reflects unwanted heat out while not re-radiating it in.
Well-ventilated roof spaces (and other non-habitable spaces) play a critical role in passive cooling by providing a buffer zone between internal and external spaces in the most difficult area to shade, the roof.
Ventilators can reduce the temperature differential across ceiling insulation, increasing its effectiveness by as much as 100%. The use of foil insulation and light coloured roofing limits radiant heat flow into the roof space.
Hybrid cooling systems
Hybrid cooling systems are whole house cooling solutions that employ a variety of cooling options (including air conditioning) in the most efficient and effective way. They take maximum advantage of passive cooling when available and make efficient use of mechanical cooling systems during extreme periods.
Fans provide reliable air movement for cooling people and supplementing breezes during still periods.
At 50% relative humidity, air movement of 0.5m/s creates maximum cooling effect; air speeds up to 1.0m/s can be useful in higher relative humidity, but prolonged air speeds above 1.0m/s cause discomfort.
Standard ceiling fans can create a comfortable environment when temperature and relative humidity levels are within acceptable ranges. In a lightweight building in a warm temperate climate, the installation of fans in bedrooms and all living areas (including kitchens and undercover outdoor areas) significantly reduces cooling energy use.
Fans should be located centrally in each space, one for each grouping of furniture. An extended lounge/dining area needs two fans. In bedrooms, locate the fan close to the centre of the bed. Because air speed decreases with distance from the fan, position fans over the places where people spend the most time. [1.]
Before rushing out and loading up with ceiling fans or floor fans or choosing an air-conditioner it would be wise to do some research and decide what your best options are and what will suit your home's needs best.
Combining using your air conditioner with your ceiling fans will circulate and draw that cold air through those other rooms and reduce your reliance on this cooling method for longer periods and in doing so, reduce your energy costs.
Of course for residents here, opening the house as much as all your windows and doors will allow from late afternoon to early morning is beneficial if overnight temperatures fall below your homes' inside temperature, especially when that cooling sea breeze is running.
As long as you have intact flyscreens to keep out all those wing-borne insects such as mosquitoes and cockroaches, or that eight legged version of garden-house visitor, the optimum is to make use of where you are and invite that salt air inside your home.
1. Sourced from Your Home: Passive cooling - Australian Government. Retrieved from: www.yourhome.gov.au/passive-cooling
The products shown here are all sourced from Johnson Brothers Mitre 10 and are examples of what is available. Pop into one of their stores at Mona Vale, Narrabeen or Avalon and speak to their friendly trained staff about cooling your home. The Mona Vale store has water features as well as many other items that will assist in keeping you and your family more comfortable during heat waves.
We want to thank all of you for supporting and trusting us through this 2020, without you we could not be receiving these two important awards.
Thank you for being our customer and thanks to all our great staff for making this possible especially though this full of surprises year.
Great Specials From Johnson Brothers Mitre 10 Get Your Summer Fix Catalogue - Read It Online Here -
ROK 2 in 1 Pedestal & Floor Fan 45cm: $49.00
Two ways of use; Pedestal or floor fan, 90 degree oscillation, Aluminium fan blades, 90 degree oscillation
Goldair Desk Fan White 30cm: $25.00
With 3 speed settings you can adjust the output of these powerful motors to cool any day, and with the oscillating feature standard on all models, you can cool that work space faster.
Goldair Portable Air Conditioner 2.0Kw: $299.00
With 7,000 BTU (2.0Kw) of cooling power, this Portable Air Conditioning unit from Goldair will keep you cool while its scorching outside! Easily move it to where you need to cool, and vent hot air outside with the included window kit. Electronic controls, 24-hour timer and the handy remote control make this portable AC easy to use!
Umbrella Market Timber 2.95m Taupe: $89.00
Taupe UV50+ 180g polyester canopy. Timber frame with 8 ribs. Manual open/close system.
Wobble-Tee Lawn Sprinkler: $32.00
Willow Entertainer Cooler 44L:$65.00
With dense insulation designed to keep food and drinks cooler for longer, Willow coolers are made to withstand harsh Aussie summer conditions.
The large size of the Entertainer Cooler is perfect for family picnics, days at the beach, parties and more.
OZtrail 3m Deluxe Gazebo: $249.00
3W x 3D x 3.35Hm. Powder coated steel folding frame with ABS componentry. Blue fire retardant 300 Denier UV treated polyester canopy with internal silver coating that blocks 98%+UV. Includes carry bag.
Neta Retractable Hose Reel 15m: $99.00
Slow, smooth, safe rewind retraction mechanism. 12mm x 15m reinforced garden hose & 2m connection hose. Made from UV stablized materials. 3 year Neta no-break guarantee.
Johnson Brothers Mitre 10 Update: Shop Online Options
Intending to keep our customers and staff safe, we present some additional ways for both our retail and trade customers to do business with us.
Trade and Retail Pick Up
Express Pick up Mona Vale
- Call Johnson Bros Mitre 10 Mona Vale, and we will pick & pack your order and have it ready for you to pick up in 2 hours. (Stocked Lines Only)
- Drive into our undercover Trade Drive-Thru area at 73 Bassett St Mona Vale, and your order will be ready for pick-up.
- Our team members will help you with your load and finalise payment/paperwork
Express Pick up Avalon
- Call Johnson Bros Mitre 10 Avalon, and we will pick & pack your order and have it ready for you to pick up in 2 hours. (Stocked Lines Only)
- Drive into our back lane off Bellevue Avenue, and your order will be ready for pick-up.
- Our team members will help you with your load and finalise payment/paperwork
Online Retail Stores Go Live
We’ve launched two eCommerce sites offering 2hr pick up in-store and flat rate delivery options on the northern beaches*.
Jbhmv.com.au (Mona Vale)
With the ability to leave the product on your doorstep, this provides an option of an entirely contactless transaction.
*Flat rate delivery is not available to trade sales, building supplies and trade quantities
** The stock availability is updated nightly, which may mean the stock is unavailable when the order is placed
Trade Delivery to Site
Maybe not new, but certainly worth a mention again!
We can get almost anything delivered quickly onto site!
As always ring the trade desk direct on 9999 0333 and let them know what you need!
Like everyone, we have found ourselves in a new and uncertain environment, but we’re setting up (and digging in) for the long haul!
We want to acknowledge that the decision to retain over 120 staff and meet any future challenges head-on, could not have happened without the continued support you provide us as customers.
Thank you and stay safe,
The Johnson Family
Johnson Brothers Mitre 10 Trade Centre at Mona Vale - everything you need under one roof.
Johnson Brothers Mitre 10 New Store
73 Bassett Street
Mona Vale - Online Store: Jbhmv.Com.Au
Products advice is available from the trained friendly staff at Narrabeen, Mona Vale and Avalon Johnson Brothers Mitre 10.
Click on logo to visit Johnson Brothers Mitre 10 website
Johnson Bros Mitre 10 - Avalon (02) 9918 3315
Johnson Bros Mitre 10 - Mona Vale (02) 9999 3340
JBH Timber & Building Supplies (02) 9999 0333
JBH Fencing & Landscape Supplies (02) 9970 6333
www.johnsonbros.com.au Online store: jbhmv.com.au
Previous DIY Pages:
Decking Timbers Caring For Your Deck Decking Finishes Privacy Screens I Privacy Screens II Privacy Screening Hardwoods Autumn Paths and Lawns Insulation Batts Plasterboard Ventilation - Edmond's Ecofan Blackboards for Children and Home Spring Lawn Care Shade Sails & Watering Basic DIY Tools DIY Tools - Power Drills Recycle Your Trampoline into An Air Bed How to Build Your Own Backyard Cricket Pitch Christmas Lights Displays around House and Garden Summer Mildew - Refresh, Renew How to Fix Things That Drip and Bump in the Night Time To Plant Winter Vegetables in a Raised Garden Beds Layout Organsing Your Tool Shed Make Your Own Weathervane Installing A Garden Watering System Decking Oils How To Make Garden Compost How To Winter proof Your Lawn How to create Shabby Chic effect on Timber Furniture How to Build Your Own Raised Garden Bed Growing Your Own Winter Vegies Winter Heating Guide Prepare Your Yard For Winter Eradicating Noxious Weeds From Your Yard How to Fix Furniture Finishes Part I How to Repair Scratches, Dings, and Dents of Furniture Surfaces - Part II Winter Draughts Fix Classic Wooden Tool Carrier Spring Garden Checklist Part I Install Your Own Skylight Retaining Walls for Saving Soil and New Spring Garden Beds Summer Salad Garden Native Plant Garden for A Fairy Arbour Renewing Short Flight of Exterior Stairs Deck Maintenance DIY Summer Tasks You Can Do In Time to Get to the Beach Garden Ponds for Attracting Birdlife, Dragonflies and for the Soothing Sounds of Water Salt Air: Maintenance and Protection Creating an Outdoor Dining Arbour, Gazebo or Patio - Part I Creating an Outdor Dining Arbour, Gazebo or Patio Part II Autumn Garden Tasks Autumn DIY Jobs: Waterproof Your Home Checklist Dealing With Dampness Inside the Home Fixing Your Fence Repairing and Replacing Damaged Decking boards DIY Toy Box and Snow Globes: School Holidays Fun - Winter 2015 DIY Wooden Toy Cars and Perfect Painted Flowerpots: School Holiday Fun - Winter 2015 Shoring Up an Under House Earth Bank – Installing a Basic Retaining Wall DIY One Shelf Sideboard Early Spring 2015 Garden Care Salad Garden For Children Keeping Your Garden and Home Cool in Hot Weather Classic Beach Garden and Camping Chairs 3 Portable Versions Anyone Can Make DIY Outdoor Furniture Mark I: Park Benches for Your Garden Make Your Own Scooter or Skateboard: Summer 2016 Fun How to Install a Solid Core Door and Door Furniture Summer Garden Jobs: Pruning A Hedge How to Make A Swing Chair - With A Frame for Garden Setting Garden Jobs for March to Make A Beautiful and Healthy Spring Keeping Outdoor Nooks Warm During Cooler Months Children’s Step Stool with Storage Stop Winter Rain Lawn Loss and Soil Erosion on Slopes DIY Garden Shed: Part 1 of 4 - Base DIY Garden Shed: Part 2 - Framing Walls DIY Garden Shed: Part 2b - Gable Roof Framing Garden Shed Part 3: Roof Installation DIY Garden Shed: Weather- boards - Door And Window Installation And Paint Finish DIY Coffee Table With Chessboard Inlay Spring Gardening: Feeding Your Soil And Plants - What Works For Each Plant DIY Sandstone Flagging Parking Area - Platform DIY Pre-Summer Checklist For A Safe Home Summer Spruce Up: Interior Paint Tips and Three easy steps to rejuvenate your timber deck The Perfect BBQ Garden Setting DIY Water Wise Garden DIY Side Gates DIY Storm Preparation And Home Protection One To Two Day DIY Weekend Spruce Ups Vegepods For Autumn Planting + Easy To Make Lego Table Or Student Desk That Can Be Dismantled + Johnson Brothers Mitre 10 Online Store Johnson Brothers Mitre 10 Great New Mona Vale Store: Still In Bassett Street - number 73 Johnson Brothers Mitre 10 New Mona Vale Store: The Greenlife Garden Centre Go Outside And Play: Creating Garden Spaces To Connect Children With Nature DIY Plasterboard Repair DIY Dolls House Or Garage Or Boatshed DIY Child's Waggon - or use as a large planter mover DIY Bathroom Refresh: Zing For Spring Tips for Growing a Native Garden FireCrunch, Australian Developed Fire-proof, Sustainable, Durable and Reliable Building Board Now Available at Johnson Bros. at Mona Vale and Narrabeen School Holidays DIY Ideas for Children: Little Vegetables Garden, Swing, Windchimes Bushfire Season Preparation 2017: Home and Outdoor Areas Johnson Brothers Mitre 10 Trade Centre at Mona Vale + Issue No 1 of Mitre 10’s inSITE Magazine for Tradies and Handymen Preparing Al Fresco Areas for Christmas Get-Togethers and Summer Visitors Summer De-bug; Mosquitoes, flies, cockroaches and ants - how to keep the outdoors insects where they belong DIY Summer Projects: Install A Fountain Or Water Feature Late Summer and Early Autumn Projects: A Shed For All Storage Solutions + Garden Tasks + Keeping Our Waterways Clean Autumn Plantings for Winter Harvests 2018 Paintback Collection Event: Johnson Bros Mitre 10 Mona Vale Saturday, April 7 Reducing Ticks in Your Garden: Garden care, Plants that Repel, What to Wear Outdoors Attracting Insectivore Birds to Your Garden: DIY Natural Tick Control Mother's Day 2018: DIY Rose Garden Winter Mould & Mildew Inside Your home: How to Keep Air and Surfaces Healthier DIY Traditional Rocking Horse Johnson Brothers Trade Day 2018 DIY Mushrooms and Vege Kits: School Holidays Fun Winter 2018 for Curious Kids Woodworking Projects for Beginners: School Holidays Fun Winter 2018 - Simple Storage Box + Wood Tool Box Spring Garden Prep: Soil Care Spring into Spring + JBH August 2018 Trifecta DIY Backyard Doggie Paradise Garden Care for Heavy Rain Days + Non-Toxic Snail and Slug Debug Ideas Garden Design and Plant Management to Minimise Tick Attacks and Infestations - insights from an essay by Bill Conroy BSc. (Agr) (Syd) + a Tribute to Wilfred Lawrence Conroy CBE by Keith Jackson, PNG and others Make Your Own BBQ Kitchen Garden: Gifts That Grow Past That Giving Day Christmas Lights 2018: Light Up the Night How to Keep Your House Cool During a Heatwave Without Using an Air-Conditioner Mid-Summer Garden Care 2018 Winners Of National Hardware Store Of The Year - Johnson Bros Mitre 10 Mona Vale! + End Of Summer Garden To Do List DIY Fruits of Your Garden: Growing Figs Fruits Of Your Garden: Growing Passionfruit - Autumn Is Also The Time To Plant Strawberries For Spring How To Water Your Plants When Away On Holidays + Some April 2019 School Holidays Fun For Outdoors; A Skateboard Swing Or Indoors; Grow Or Make Pot Plant People Dealing With Autumn Dampness Inside The Home + Mums Day Gifts For 2019 Winter Heating Guide + Get Ready For Winter Specials Keeping Your Garden Dewful During Times Of Water Restrictions and Drought Installing Leaf Stopper Gutter Guard + Trade Day 2019 JBH Mitre 10 Trade Day Guests 2019 An Artfull Garden - for Winter School Holidays 2019 DIY Deck Refurbishment: Turning Wood Into Open Tiled Spaces - Groundworks Father's Day Wish List 2019 + How to Re-stain your Deck timbers and posts for Summer Installing Posts For Decks and Verandahs With Heavier Loads + Installing Membranes For Tiled Decks National Garden Week's 2019 Focus Is On Children(Oct 13-19): Spring School Holiday 2019 Garden Ideas (to get started on) Replacing Balustrades Handrails DIY Tiling Your Verandah: and Choosing Your Simple Or Complex Tile Pattern Reduce Bushfire Risk To Older Homes + Preparing Your Yard For Bushfires Time to Put Up those Christmas Lights and Deck your Gum Trees with rows of Jolly! NSW RFS Bushfire Survival Plan 2020 + Reduce Bushfire Risk To Homes + Johnson Brothers Mitre 10 Great Water Saving Ideas during Level 2 water restrictions + some 'Don't Sweat Summer' Specials The Inaugural Sydney Edible Garden Trail - Learn how to help your garden survive the heat, drought, and water restrictions DIY Flyscreens DIY Privacy Screen In 2 Hours Family Hardware Store Wins Best In Australia Autumn DIY Jobs: Exterior Jobs to Keep Everything Dry and Cosy Inside the Home Autumn Vegepod Garden: Plant Now to Stay Healthy: JBH Response to COVID-19 Restrictions - We're Adapting! Autumn Holidays Projects: Let's Go Fly A Kite + Some handy Painting Tips for Interiors and Sprucing up that Outside Deck - Easter Hours 2020 Pittwater's Noxious Weeds: A Great Time To Get Outdoors and Pull Them Out and Replace With Native Plants Blooming Lovely: Late Autumn Planting For Gardens Full Of Colour, Cheer + Great Food For The Table Dealing With Dampness Inside The Home - June 2020 DIY A Job For Life: Apprentice Carpenter + Commencement Tool List Winter School Holidays 2020: Easy To Do Garden Mosaic Pavers Little Hands Can Create + Home DIYer: Simple Concrete Slab DIY - A Job For Life: Landscape Gardener Apprenticeship DIY Fathers' Day ideas for 2020 + August Garden Jobs DIY Job for Life: Plumber's Apprenticeship Early Spring Garden Care Spring 2020 + Salad Garden For Children A Job For Life: Certificate III In Electrotechnology - From Apprentice To A Business Owner; Jay Turns Up The Voltage On His Career + Spring Garden Specials - seedlings time! Spring is here and wattles are out in bloom: a love letter to our iconic flowers Perfect Tomatoes, Capsicums and Spring Onions - Summer Salad Staples + what to plant now BBQ Season: some tips to keep your New or Old BBQ Clean Christmas Lights Time 2020: Deck Your Home With Rows Of Jolly! Johnson Brothers Avalon Store Renovations & Mona Vale Store: Everything You Need This Summer In Stock
John and Bob Johnson - The Johnson Brothers Profile John William Alfred Johnson - The Eulogies for those who could not attend Mass
Australia's Prime Minister Visits Mackellar - Informal Afternoon Tea with Hon. Malcolm Turnbull October 2016
JBH Win Awards August 2018 Trifecta - 2018 Free Trade Day supporters, Mitre 10 Heritage Advert features JBH Mona Vale Store, Hardware Australia’s 2018 NSW Hardware Store of the Year over 2500sqm.
Front Page Issue 294: 2018 Winners Of National Hardware Store Of The Year - Johnson Bros Mitre 10 Mona Vale !!!
National Garden Week's 2019 Focus Is On Children(Oct 13-19): School Holiday Garden Ideas (to get started on) & Congratulations Award Winning Johnson Brothers Mitre10 At Mona Vale - 2019 NSW Store Of the Year, 2019 NSW Trade Centre Of the Year and 2019 Village Garden Centre of the Year
Johnson Bros Mitre 10 were awarded as the best Trade Store in the country: February 2020
Family Hardware Store Wins Best In Australia: Johnson Bros Mitre 10 Mona Vale Crowned ‘National Trade Store Of The Year’ - Celebrating 65th Year in 2020
Anzac Day In Pittwater 2020: Candles, Crosses and Online Commemorative Services: Johnson Brothers Family Donates 20 Thousand Candles to Community Light Up The Dawn Initiative
Front Page Issue 447: ANZAC DAY 2020