Insulation

[Bl4d3]

Hi all. Have been googling and searching the forums for the last week or so and am no where closer to answering my questions.

Part 1:
I've recently bought a house and enjoying every moment of it, however there are some spots I'd like to insulate.
Having gone into the ceiling to pull ethernet cable, the whole house is insulated with what appears to be 50mm isotherm. Not the greatest but substantially better than the flat I was previously living in.
The only space not covered for some reason was above 1 of the bedrooms, fortunately this is the room nearest to the access hatch and will be quite easy to lay down some additional insulation.

Should I use isotherm to fill this space, I would likely get 100mm, or should I rather use aerolite. Granted aerolite is glass fibre, however it has a higher R-Value and is cheaper.

Part 2:
I have a single garage of roughly 20sqm, big enough to fit my car and have some space for a work bench. I find myself spending quite a bit of time in the garage however it is unbearably hot, forcing me to spend a maximum of 5 minutes a time mid day.
The roof is flat IBR which does an amazing job in converting the garage to an oven, with support beams every 900mm.
I initially looked for Kraft faced insulation but cant find any in South Africa. I then looked at sisalation as it would be easy to install, however there are reviews on each end of the spectrum with some saying its amazing, and others saying is a waste of money.
The other option is to use more isotherm or aerolite, but I would need a way to secure it, and I am not keen on putting up a ceiling.

What recommendations would you suggest here?

 

[tetrasect]

Hi all. Have been googling and searching the forums for the last week or so and am no where closer to answering my questions.

Part 1:
I've recently bought a house and enjoying every moment of it, however there are some spots I'd like to insulate.
Having gone into the ceiling to pull ethernet cable, the whole house is insulated with what appears to be 50mm isotherm. Not the greatest but substantially better than the flat I was previously living in.
The only space not covered for some reason was above 1 of the bedrooms, fortunately this is the room nearest to the access hatch and will be quite easy to lay down some additional insulation.

Should I use isotherm to fill this space, I would likely get 100mm, or should I rather use aerolite. Granted aerolite is glass fibre, however it has a higher R-Value and is cheaper.

Higher R-value and cheaper sound like a no-brainer. Just wear a mask and gloves. Fibreglass is not dangerous, it just itches.

Part 2:
I have a single garage of roughly 20sqm, big enough to fit my car and have some space for a work bench. I find myself spending quite a bit of time in the garage however it is unbearably hot, forcing me to spend a maximum of 5 minutes a time mid day.
The roof is flat IBR which does an amazing job in converting the garage to an oven, with support beams every 900mm.
I initially looked for Kraft faced insulation but cant find any in South Africa. I then looked at sisalation as it would be easy to install, however there are reviews on each end of the spectrum with some saying its amazing, and others saying is a waste of money.
The other option is to use more isotherm or aerolite, but I would need a way to secure it, and I am not keen on putting up a ceiling.

What recommendations would you suggest here?

Start with painting the roof white. Preferably with a paint containing Titanium Dioxide or Barium Sulfate or something with very high reflectivity. Then see if the heat is still as big of a problem.

 

[WAslayer]

Hi all. Have been googling and searching the forums for the last week or so and am no where closer to answering my questions.

Part 1:
I've recently bought a house and enjoying every moment of it, however there are some spots I'd like to insulate.
Having gone into the ceiling to pull ethernet cable, the whole house is insulated with what appears to be 50mm isotherm. Not the greatest but substantially better than the flat I was previously living in.
The only space not covered for some reason was above 1 of the bedrooms, fortunately this is the room nearest to the access hatch and will be quite easy to lay down some additional insulation.

Should I use isotherm to fill this space, I would likely get 100mm, or should I rather use aerolite. Granted aerolite is glass fibre, however it has a higher R-Value and is cheaper.

Part 2:
I have a single garage of roughly 20sqm, big enough to fit my car and have some space for a work bench. I find myself spending quite a bit of time in the garage however it is unbearably hot, forcing me to spend a maximum of 5 minutes a time mid day.
The roof is flat IBR which does an amazing job in converting the garage to an oven, with support beams every 900mm.
I initially looked for Kraft faced insulation but cant find any in South Africa. I then looked at sisalation as it would be easy to install, however there are reviews on each end of the spectrum with some saying its amazing, and others saying is a waste of money.
The other option is to use more isotherm or aerolite, but I would need a way to secure it, and I am not keen on putting up a ceiling.

What recommendations would you suggest here?

150mm isotherm, cause working with glass fibre is no joke and PPE is a must..

For garage you can run some nylon rope across the beams to secure insulation, though personally I would install isoboard ceiling.. get insulation and would help with lighting as well and easy to install..

 

[B-1]

If you have ever worked with fibreglass you won't even ask that question.

It has a higher R rating as well as better sound deadening but for diy I would not consider it.

 

[tetrasect]

If you have ever worked with fibreglass you won't even ask that question.

It has a higher R rating as well as better sound deadening but for diy I would not consider it.

Yeah on second thought it's probably worth spending a few bucks extra to prevent the mission of working with that stuff...

 

[me_]

Before taking the DIY route, I suggest getting a quote from an installer first to compare. I had Isotherm installed around 10 years ago and I found the installed price to be very close to the price of the insulation itself and the installer was able to offer thicker insulation than what was available at Builders. The installers were getting very big discounts making them competitive with DIY.