Roof insulation.

Have you tried any of your "ideas" yourself wifybabycakes?

Has it ever occured to you that on the scale of a single house its actually cheaper to just pay someone to come and put in a "conventional" product.
 
roof insulation

what kin da of roof do you have if its roof sheeting then sisalation if its roof tiles then pink aerolite
 
Good thread. I have stayed away from roof insulation, since I had to fix some issues in my roof cavity first.

Based on the advise here, it looks like I'll be going with Isotherm 100mm. Tx ;)
 
Just for the record on price. I'm in Cape Town

Builders Warehouse (self install):
Aerolite 100mm : R25m2
Isotherm 100mm : R42m2

Aerolite Installed (2 quotes):
R41.50m2 for >200m2
R43m2 for <200m2

Struggling to find quotes for Isotherm installed
 
I had a company called Pregare come and install their stuff, almost like Isolite, basically a recycled product (PET) with a foil covering. what a difference!! I also self installed double glazing on all my windows, consequently I regularly seen a 6-8degree difference in the in & out temp!! Problem is it can get a bit stuffy inside when the outside temp drops below the inside temp but I'm planning on installing a filtered ventilation system this year which will solve that problem.
 
spiff ... what did your install cost you??
also, can you explain the filtered ventilation system, and how this will help exactly?? Where and how will these be installed??

I want to put in some isotherm, but not sure about the process and costs,etc.
 
Just got quote for Isotherm installed

R57m2 for 75mm

Now, while I would love to go for the Isotherm, Aerolite will cost me R41.50m2 for 100mm
Thats a R3100 difference on 200m2 roof, that could buy me other toys :)
 
lucifir said:
spiff ... what did your install cost you??
also, can you explain the filtered ventilation system, and how this will help exactly?? Where and how will these be installed??

I want to put in some isotherm, but not sure about the process and costs,etc.
Click to expand...

no problem - I will have to dig out the receipt but I'm sure it was around R2500-00 for +-85 square meters at the time. also I've since learnt that pregare was taken over by another company, not sure who yet.

the filtered system - I must add here that this only really applies to my situation. after they installed the roof insulation, I smashed out all my front windows and replaced them with tinted burglar proof laminate glass on the inside & outside of the frames. the reason I did this is because I suffer from allergies so I wanted to permanently seal all the front windows and it worked out cheaper than having aluminium windows frames installed. The roof insulation & double glazing works very well and keeps the house cool in summer and warm in winter, I even tossed out my jet master as I no longer need a heater in winter :)

As I prefer the cold weather the problem I now have is that in summer during the night when the OUTSIDE temp drops lower than the INSIDE temp, then it becomes uncomfortably warm inside, so I'm going to install a ventilation system that will switch on when the temp outside starts to drop until it reaches a set cut off point thus cooling the inside, the filtered part is just for my own comfort. there is a company out in Brackenfell that does custom ventilation systems, they r in Tee Jay Rd Brackenfell IND. it gets installed in yr roof and they have vents in the ceiling that u can operate via a remote eg. open or close.

I chose the pregare stuff as I did not fancy the pink glass fiber or the shredded paper stuff!

if u planing on installing downlighters - do them first before installing roof insulation.

also keeping doors, windows & curtains closed on hot days, will help to keep the inside temp down - think of yr house as a fridge - keep it shut and it will stay cool / warm.
 
I just got 2 quotes to insulate my roof (standard pitched roof ~130m²) for my house in Cape Town:

www.thermguardcape.co.za:

75mm @ R 37.00 per m² = R 4 810.00 for 130m²

100mm @ R 44.00 per m² = R 5 720.00 for 130m²

135mm at R54.00/m²

http://www.eco-insulation.co.za/ :

Eco-Insulation's cellulose fibre ceiling insulation installed at 100mm thickness R39.00/m²

Eco-Insulation's cellulose fibre ceiling insulation installed at 135mm thickness R49.00/m²

The products seem pretty similar, but are there any differences I should be aware of before deciding? Also, is it worth the extra cash for the for 135mm over the 100mm?

Regards.
 
A thread necro, but at the right time of year, and with current prices.

I have just bought Aerolite from Builders Warehouse, 100mm x 1.2 x 8.0M (9.6M2) for R415.

They also stock 135mm which is the recommended for Centurion, but as I will be putting in flooring is not necessary.

They also have Thermaflex pipe insulation at R40 for 2.0M.

I came on this thread whilst trying to find prices through Google.
 
Had Aerolite put in two weeks ago. Massive difference. This winter I am going to be snug as a bug! :D
 
Anyone used an installer in JHB recently for this?
Mind sharing their details?
 
Just to give some feedback here:
Had Isotherm installed in my house (130mm) - makes a big difference to the cold.
I used GreenSteel Homes - http://www.greensteelhomes.co.za/
They did a great job, on time, no issues.
Dealt with Elmar Botha.
 
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