Roof insulation.

Goobie said:
Why is itching a problem for people? Once it is installed (the installer itches but thats what he get paid for) and if you don't go rolling in it you will NEVER experience the itching. I go up to the attic area ALOT as I constantly improve my LAN cabling and I have NEVER itched from it.

From their respective websites:
The R-value for 100mm Think Pink is 2.5
The R-value for 100mm Isotherm is 2.2
Click to expand...
Itching is only a problem if you lay it yourself or regularly work with it without gloves. More important though is the mask so you dont breathe in the fibres.
 
supersunbird said:
We have a flat roofed house, so would have too remove the roof panels to put this in, but I so want to!
Click to expand...

Concrete flat roof ? If it is spread a layer of stone 75mm thick over the roof, also helps to protect the waterproofing from the sun.
 
A late reply but allow me to add my 2c worth. "Think Pink" is made of glasswool, that is why it itches. Normally not a problem, as one can use prot gear when installing, but you may have to go back into your ceilng at some stage for repairs - then the itching starts all over again. I have the cellulose stuff in my ceiling in the Cape, but I will not use it again. They claim all kinds of SABS ratings (adverts look like Idi Amin's uniform) but my experienc eis that the so-called 75mm layer tends to compress over time. My 75mm installed layer is now only 30mm thick! It's also difficult to work in the ceiling without disturbing the stuff. Isotherm is the best option as it is made of polyester, not glass. It does not itch and it is made of recycled PET (Sprite) bottles. In essence all the products available has similar R values, so they do the job. With Isotherm at least you know you are assisting with removing PET bottles from rubbish heaps. Working in your ceiling and handling the product afterwards is also easier - no itch and no disturbing the paper stuff.
 
Anybody have an idea what the current cost of isotherm is (with insulation). Guess my choice will be between aerolite or isotherm.
 
Isotherm itself costs around R135 - R140 per roll (depending on thickness). A roll covers 12m2. It is 1.2 m wide and 10m long. That works out to around R12/m2. If someone charges you more (eg R40/m2) you've been ripped off!. In fact, Earolite and Isotherm costs very much the same at a place like Builders warehouse. That previously mentioned R40/m2 must be an installed price - and it is very high. Get the Isotherm and DIY.
 
Hey guys. I am busy installing insulation myself - and here is the facts on Isotherm that I have gathered by phoning Brits Nonwoven, the company that manufactures it.

When you buy- compare apples with apples. Isotherm comes in 40mm, 50mm, 75mm and 100mm thickness. The thicker, the better "R" value (better insulation), but also the more expensive. Most retailers only stock the 40mm and 50mm - for obvious reasons. According to Brits, the price should range bewteen R12/m2 and R27/m2 (installation excluded), depeding on thickness.

Earolite has a similar range - not sure what it is, as I am staying away from glass.
 
in terms of the installation .... what is involved and do you get instructions from the vendors of the products???
 
Heard about the insulation material that they spray on the ceiling? Thought of getting this done, but have not done any home work on it yet.
 
I'm going to be doing my roof in a few weeks time - also decided to go the isotherm route.

The pricing I've got is:
1.2MX40MMX10M R149
1.2MX50MMX10M R177
 
gregmcc said:
I'm going to be doing my roof in a few weeks time - also decided to go the isotherm route.

The pricing I've got is:
1.2MX40MMX10M R149
1.2MX50MMX10M R177
Click to expand...

50mm is WAAAAAY too thin and is a waste of money. Go for at least the 100mm thinkness, if isotherm doesn't have them, go with thinkpink.
 
Sorry to dig up an old thread, but does anyone have any recommended installers in the East Rand area for either Isotherm or the cellulose fibre? I'm also looking for a geyser blanket installer.

Everybody I've tried either doesn't answer their phones or are not around.
 
Hmm... I really can't decide between Isotherm and the recycled paper/cellulose one.
 
Me either. I want to get prices on both.. I think the isotherm will be less messy though.
 
The isotherm's a little more expensive according to quotes I just got - 2 x 50mm Isotherm (making 110mm) comes to R36 per sq. metre. Eco Insulation comes to R33 per sq. metre.
 
I'm assuming that's installed?

My problem is finding someone that actually answers their phone :p
 
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