Hi all,

I am staying in a corner house WITH SIDE WALL FACING WEST and it is extremely hot.

I intend to insulate my house but do not know which part should be given priority, roof or wall?

If i paint the wall with anti heat paint, how to tackle heat from the roof? As i have limited budget, which part should i insulate?

Please share your experience.

If your budget is really low, suggest you paint the walls by yourself (or hire a worker) using the new Nippon Solarguard (for roof and wall). Approx RM160 per 5 liters.
The roof maybe get someone to do it because of safety issues. This is the cheapest solution already. Never tried it before, but apparently can reduce up to 5C for roof and wall. They had a demo in the last property fair - with attached sensors to prove their point. I also touched it myself (just in case they cheat the sensors) and you can feel some difference in heat absorption. But if it's a brand new house, maybe not so worth it to re-paint.

Can also try tinting windows.

If you got wall, means Semi-D / end lot / corner unit. Use the space to plants trees

This post has been edited by KeNNy: Aug 6 2009, 11:51 PM

also choose white color unless you can get chrome...

For external wall of 20'high, it is not easy man!!

I am doubtful the paint will last long, may b after 2 or 3 years need to re paint again. Big hole in pocket

Any idea how many coats need to apply to achieve 5 deg. difference? From the price of it, i think it won't b cheap.

Any other better way that can last long ? Got to re paint and repaint ..... very "chiao lak"

If i were to choose roof or wall ? Which area should i do first?

@easyperson
If I am you, I go for roof insulation first. It is a one shot buy. No maintenance required in the long run.

Wall, like you mentioned, you need to repaint it to have the effectiveness maintained. It costs money in long run.

The solar guard says 10 years protection - longer than teh traditional 5 years one.

If insisting on insulation, dream is right - go for roof first. The side walk you can still do something about it e.g. planting trees, tinting windows, etc. It's also not the major cause of heat.

Although bear in mind roof insluation will help ground floor a little bit, although the main function is to insulate heat for 1st floor.

if go for roof insulation, which method is more effective? paint the roof or do some other materials on ceiling (many types available)?

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Added on August 8, 2009, 4:55 pmAny idea what is the price like? 10 years aginst what? Peeling off ? Colour? Performance?

If roof tile cracks and cause leaking, can replacement be done?

What is the major cause of heat then?

This post has been edited by easyperson: Aug 8 2009, 04:55 PM

From my research, rockwool or cellulose insulation for roof is your best choice.
Painting those heat rejection coating will only be good for first few years until dust start to collect on the tiles or the paint fades.

Radiant barrier (google is your friend) isn't that good in my opinion, but you may wan to consider that too.

Then you can also have option to have second roof tiles installed under your 1st tiles. Check out Monier.

easyperson,

please note: cellulose can also be used to insulate your wall. measure the temp from wall inside and ceiling inside to see which transmits more heat. most likely the roof but just to be sure measure it over several points during the day. temporay spikes dont mean its the main culprit.

then insulate the bigger one of the two first and check what you have to pay for the second one. my walls are thick and painted just white. they dont get warm. the windows did. so we replaced the windows with class A UPVC (insulated white alluminium will do too i guess) windows, double glazed and laminated with raybarrier. works like a charm. can have the sun shine on the wall brighten the room and the aircon doesnt even have to work to keep the room at 28°. nice and comfy

Wow. You really can be a green consultant

PJusa, can you elaborate a little bit on the Class A UPVC double glazed windows? Are these 2 panel windows (front and back) with air insulation in between one?

Can I conclude that insulate the roof is of priority and wall secondary?

I am looking for something effective, affordable and last long.

I may now concentrate to select the best materials for roof now.

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Added on August 10, 2009, 6:39 pmI can't afford to spend too much monies on other parts of the houses.

among the roof, wall and windows, i can only afford to do one

so I summarise the advices from all of you is THE ROOF !!

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Added on August 12, 2009, 10:09 pmMy lastest finding is that the best treatment to west wall for anti heat purposes is to install timber panelling on it.

Timber is poor heat conductor and can be used to decorate the wall also.

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Added on August 12, 2009, 11:49 pmMy latest finding is that the best treatment to west wall for anti heat purposes is to install timber panelling on it.

Timber is poor heat conductor and can be used to decorate the wall.

Whereas for roof insulation, I agreed with your choice to use TCL cellulose.

This post has been edited by easyperson: Aug 12 2009, 11:49 PM

@easyperson
@Kenny

In your opinion, which is the best ANTI HEAT PAINT?

Have you used any of them and what is the result??

@ easyperson

I think Anti heat paint cannot give you result for long time, as you mentioned
My Roof is insulated by same Material ( Cellulose insulation ) and TCL Installed this on my Roof, after Insulation I notice that the home temperature is stuck on 27°c to 28°c, its done on Saturday, but of course we have to monitor the Cellulose performance

I've not used the solar guard by Nippon before. Only seen it in exhibition and miniature demo unit.
But mention it because it's probably one of the cheapest solution, especially if you're having an old house and the roof needs re-painting anyway.