06 May 2009

Building the eco friendly way - Concrete slab preparation

Like most concrete slabs, reinforcing bar is required to help give the slab it's strength. And like all material choices that can be made during the course of construction, one can choose to make a sustainable choice or not. In the case of the reinforcing bar we have chosen to use reinforcing bar from a supplier who uses 100% recycled steel. By using recycled steel, the environmental impact of the steel has been reduced. Recycling steel uses a lot less overall energy than mining ore, and precessing it in order to make new steel.

What is more, the strength and quality of the recycled material is the same as the new material.
The photo above shows the steel reinforcing being placed inside the form work for the concrete slab.

Timber wall and roof framing is still the dominant material for house construction in Sydney. Unfortunately this is the favorite food of one of our native creatures, termites. So it is necessary to have some form of termite protection when you build in timber in order to prevent your house being eaten out around you!

Termite protection can take many forms and more often than not involves some from of pesticide. The key is, to avoid spraying termite barriers on the soil and ground around your house. Not only are they toxic for termites, but they aren't particularly good for humans and the ground ecology.

Several new products on the market seek to address this issue by safely encapsulating a termiticide within a 'blanket' a bit like thick plastic, which can not leach the termiticide. These blankets are used to protect around pipes such as the one above, which prevent termites from entering your house by forming a physical barrier that the termites can not penetrate.




To heat the house in winter we have installed a 5 star gas in slab hydronic heating system. For those who don't know what I am talking about, a hydronic heating system is essentially heated water running through pipes, the pink ones in the photo above, which delivers heat to a location, in our case, the concrete slab.

Hydronic heating is very efficient because is works on the principle of radiant heat, which warms objects rather than convective heat which just warms the air. What is more, in slab hydronic heating is doubly efficient because the heat starts at the bottom most point in a room and rises to the top, heating everything along the way. Rather than air conditioning which generally tries to heat the air in a room from the grilles in the ceiling, down. One way is working with nature, heat rises, and the other is trying to fight it.

For in slab hydronic heating to work at its best, the floor should not have an insulating covering such as carpet or timber. So tiles or exposed concrete in our case, tend to be the best.

Above is the manifold which looks after the balancing of the hydronic heating pipework. Put simply, the two white pipes on the left are the flow and return from the gas boiler and the red is the heated water going out to the slab and the blue is the heated water returning back.

The heating system is designed as a closed loop, so the same water stays in the pipework getting heated at the boiler, then going through the red manifold and out to the slab, then back to the blue manifold and then on to the boiler to get heated and start again. Pretty simple really.

11 comments:

Francis Bell said...

REALLY GREAT NEWS!!! You can now not only heat and cool your home the clean,earth friendly , renewable , geothermal way-but also your POOL! This is information well worth looking into-Francis http://www.geothermalquestions.net

plastic stanchions said...

Great Blog!! That was amazing. Your thought processing is wonderful. The way you tell the thing is awesome. You are really a master
http://www.stanchionexperts.com

kuku fashion australia said...

WOW.. Sweet Fashion! Fantastic topics. Liked it., Thanks for the nice Blog. This is really Fantastic. Enjoy online fashion shopping with us! We are- Kuku fashion Australia, with Kuku, Kuku dress, Kuku dresses, Kuku fashion, Mad Love stockist, Mad Love fashion, Toi et Moi online, Toi et Moi jacket, Toi et Moi online. Thanks for staying with us.

Knowledge Plus Australia said...

Thanks for the Great Post. Knowledge Plus is a Registered Training Organisation. training provider australia, training provider australia, elearning australia, certificate iv in business australia, online qualifications australia, diploma qualifications australia, diploma qualifications australia, skills for all courses south australia, affordable online qualifications australia, online qualifications australia and many more Training and Supports.

face painter | body painter said...

Good Blog. The written topics is excellent and helpful for worldwide knowledge. Welcome to our face painting world with - face painting, face painter, face art, body painting, body painter, body art, virginia face painter, belly bumps, glitter tattoo, theatrical makeup Thank you for staying with us. This is a Global Marketing not spam!.

green products said...

Thanks for the Great Post. We want a Green earth for LIVE, why we need- green home, green products, green product, buy green, eco friendly products, environmental products, eco green products, environmentally friendly products. Thank you for staying with us.

mou liton said...

We are the contractor since 1980 for alternations, renovations and extensions. On our website you find more information and you can request a quotation. aannemer, aannemersbedrijf, bouwbedrijf, verbouwen, renovatie, kosten uitbouw,kosten verbouwing
Thank for the Post.

oil change va said...

Nice blog. Try to repair engine oil leaks to keep the environment clean. Thanks- oil change and oil change va

best wedding coordinator washington state said...

Excellent & Cool! – I should definitely say I'm impressed with your blog. I had no trouble navigating through all the tabs as well as related info. The site ended up being truly simple to access. Excellent job.. Carry-on. About us..! please visit.
seattle wedding planner
tacoma wedding planner
woodinville wedding planner
tacoma event planner
woodinville event planner
number one wedding planner seattle
tacoma wedding coordinator
tacoma event coordinator
best wedding coordinator washington state
best wedding planner washington state
best wedding planner seattle
best wedding planner tacoma

joana lui said...

It is great to observe somebody put enough craze towards a matter. I'm thankful that I stumbled upon this process. I am lucky I used the time to read on past the 1st paragraph. You have got a whole lot to say, very much to offer. I really hope guys understand this and look into our page.


safety deposit box
bank safety deposit boxes
mailbox post
residential mailboxes
gold bar for sale

Naqash Ahmad said...

I have seen some very fantastic blogs.
i am also planing to start my blog according to my current site
Pakistani Urdu Columns