Roof insulation.

battman said:
Hi CamiKaze,
To me Lambdaboard is by Lambdaboard and Lambdaboard the Lambdaboard.
Not because they Lambdaboard me every Lambdaboard, which is so Lambdaboard because having this much Lambdaboard cant be a real Lambdaboard, but because there is no Lambdaboard to match it. Lambdaboard.
Our only Lambdaboard is Lambdaboard material cleverly re-Lambdaboard'ed as insulation - Lambdaboard.
Which honestly i wouldn't want in my Lambdaboard for free.
But ask Lambdaboard and Lambdaboard everything Lambdaboard says, you will find what is Lambdaboard.
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ftfy

It's sales guys like this that makes me steer clear of a product. They drive me insane.
 
SilverNodashi said:
phew! I thought I was the only one who felt like this.
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Switched off this thread for the same reason -- good to hear there's some sanity out there. There must be some limit to the amount of 'selling' people are allowed to do on here?
 
Splinter said:
My plastic liner is the same. And just been through 3 different leaks . But, Tiles are actually your best defence against leakage; how will roof insulation help with that? Also taking into account my roof is a bit of a rats nest of cables and water-pipes. If you have an issue, how will anyone find it without turfing up all the sprayed roof insulation?
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as I said before the cost of removing all the tiles - installing plastic lining and replacing tiles proved to costly. also the plastic does not last forever so the problem will return. the house was built in 86 and I moved in, in 92 so there's a 6yrs life span for plastic lining in my case.

My idea was to get them to spray foam directly underneath the tiles and not on the ceiling itself - this would provide water proofing & thermal insulation - solving 2 problems.

both spray foam companies did not want to spray directly underneath the tile as they believed the heat build up in summer might cause the tiles to crack - so they did not want to take a chance. one company said my roof was to small to work in with there equipment anyway.

I then installed normal roof insulation with a tin foil backing between the rafters - so even if the water drips onto the tin foil roof insulation - it never gets through to the rhino board and eventually just evaporates.

this was done many years ago now so even if the tiles are leaking I don't see it or hear it and it only cost me R2500-00.

I inspect my ceiling and roof tiles / solar geyser / all parapet walls and repaint all the torch on, once a year so I know there are no broken tiles that would cause a major water leak.
 
spiff said:
as I said before the cost of removing all the tiles - installing plastic lining and replacing tiles proved to costly. also the plastic does not last forever so the problem will return. the house was built in 86 and I moved in, in 92 so there's a 6yrs life span for plastic lining in my case.

My idea was to get them to spray foam directly underneath the tiles and not on the ceiling itself - this would provide water proofing & thermal insulation - solving 2 problems.

both spray foam companies did not want to spray directly underneath the tile as they believed the heat build up in summer might cause the tiles to crack - so they did not want to take a chance. one company said my roof was to small to work in with there equipment anyway.

I then installed normal roof insulation with a tin foil backing between the rafters - so even if the water drips onto the tin foil roof insulation - it never gets through to the rhino board and eventually just evaporates.

this was done many years ago now so even if the tiles are leaking I don't see it or hear it and it only cost me R2500-00.

I inspect my ceiling and roof tiles / solar geyser / all parapet walls and repaint all the torch on, once a year so I know there are no broken tiles that would cause a major water leak.
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Thanks Spiff. A very informative post. Basically what I want to do.
 
spiff said:
as I said before the cost of removing all the tiles - installing plastic lining and replacing tiles proved to costly. also the plastic does not last forever so the problem will return. the house was built in 86 and I moved in, in 92 so there's a 6yrs life span for plastic lining in my case.

My idea was to get them to spray foam directly underneath the tiles and not on the ceiling itself - this would provide water proofing & thermal insulation - solving 2 problems.

both spray foam companies did not want to spray directly underneath the tile as they believed the heat build up in summer might cause the tiles to crack - so they did not want to take a chance. one company said my roof was to small to work in with there equipment anyway.

I then installed normal roof insulation with a tin foil backing between the rafters - so even if the water drips onto the tin foil roof insulation - it never gets through to the rhino board and eventually just evaporates.

this was done many years ago now so even if the tiles are leaking I don't see it or hear it and it only cost me R2500-00.

I inspect my ceiling and roof tiles / solar geyser / all parapet walls and repaint all the torch on, once a year so I know there are no broken tiles that would cause a major water leak.
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I think we are talking at cross purposes. Roof insulation is for controlling temperature. Not water leaks. The plastic sheeting is designed to redirect water, once you have have a leak, to something that will allow it to run off safely. But as you say, and I have experienced, this sheeting basically disintegrates after a few years.

But don't be so sure about your "tin foil backing". Part of my leaking issues were because the aluminium "flashing" had developed holes in it.

Having said that, you have stated what I have just learned - you need to get your roof inspected once a year for tiles, waterproofing, valleys and flashing.

EDIT: And gutters. Apparently if the gutters get full of leaves and stuff, they can overflow. That would be ok if the only overflowed outwards, but it seems that if they do that inwards, sometimes the way a house/flat is designed means it can result in leaks inside your place.
 
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Splinter said:
I think we are talking at cross purposes. Roof insulation is for controlling temperature. Not water leaks. The plastic sheeting is designed to redirect water, once you have have a leak, to something that will allow it to run off safely. But as you say, and I have experienced, this sheeting basically disintegrates after a few years.

But don't be so sure about your "tin foil backing". Part of my leaking issues were because the aluminium "flashing" had developed holes in it.

Having said that, you have stated what I have just learned - you need to get your roof inspected once a year for tiles, waterproofing, valleys and flashing.

EDIT: And gutters. Apparently if the gutters get full of leaves and stuff, they can overflow. That would be ok if the only overflowed outwards, but it seems that if they do that inwards, sometimes the way a house/flat is designed means it can result in leaks inside your place.
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quite right the tin foil insulation is not intended for water proofing but it solved my problem for now and even if I have to replace some of it - it's still cheaper than replacing the plastic liner. I will check my insulation this week end and see if there is any changes.

what caused your holes? mice / rats / age?

the other alternative was to lay "torch on" over the entire roof, like I did with my 2nd garage roof - but they said it would be to heavy. So I just laid torch on over the ridge caps - that had cracks in the joints.

I also removed a tile and installed a vent to allow the heat / moisture to escape.

gutters can be a nightmare sometimes. my indoor braai room has a storm gutter 400mm x 50mm x 4000mm it takes water from the main house roof plus the braai room roof and works perfectly without leaks - till the collector box feeding the down pipe gets blocked - this shows up by dripping inside my braai room wall just where the idiots made a joint in the gutter :(

some info on roof maintenance

https://peche.co.za/wp-content/uplo...e-Roof-Tiles-and-Ridges-need-to-be-sealed.pdf

http://www.easydiy.co.za/index.php/...s/productbrochures/upvc-rainwater-systems.pdf
 
spiff said:
quite right the tin foil insulation is not intended for water proofing but it solved my problem for now and even if I have to replace some of it - it's still cheaper than replacing the plastic liner. I will check my insulation this week end and see if there is any changes.

what caused your holes? mice / rats / age?

the other alternative was to lay "torch on" over the entire roof, like I did with my 2nd garage roof - but they said it would be to heavy. So I just laid torch on over the ridge caps - that had cracks in the joints.

I also removed a tile and installed a vent to allow the heat / moisture to escape.

gutters can be a nightmare sometimes. my indoor braai room has a storm gutter 400mm x 50mm x 4000mm it takes water from the main house roof plus the braai room roof and works perfectly without leaks - till the collector box feeding the down pipe gets blocked - this shows up by dripping inside my braai room wall just where the idiots made a joint in the gutter :(

some info on roof maintenance

https://peche.co.za/wp-content/uplo...e-Roof-Tiles-and-Ridges-need-to-be-sealed.pdf

http://www.easydiy.co.za/index.php/...s/productbrochures/upvc-rainwater-systems.pdf
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Thanks.

Not sure what caused the holes - general wear and tear I think.

And people really need to get their roofs inspected - I initially had a R28000 claim rejected because the roof had not been "maintained".
 
The holes in the plastic are usually because if cost.
The plastic is sold in thicknesses of microns. Most times the cheapest option is opted for and they last 3 to 4 years.
 
Where/how does one buy Lambdaboard? Do you sell direct? (I'm in benoni)
 
Hi rorz0r,
Yes, you can buy directly from our factory.
Its close to you in Detroit Street, Apex.
Next to the Albany Bakery.
But its easier to phone your order in, saves you time
If you want to use it as insulation, under screed, or in the walls, I can get you the material cheaper -damaged or scratched boards
The name of the company is Rigifoam 011 421 0301.

Next year there are plans in place to have a retail outlet in Edenvale, potentially close to Shwaben Butchery/bakery - those who know them, they make good food.
 
as I said in my previous post - I check my roof once a year so finally got round check on my roof insulation and to install some roof vents.


removing tiles to install vents
20171228_155443.jpg


as you can see bone dry and no signs of water dripping onto insulation - the dust is expected since the plastic liner has rotted away years ago (see previous posts)
20171228_155435.jpg

so 2 projects done & dusted for another year
 
SauRoNZA said:
What do the vents look like? And do they help?
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Not the best one. Will take a more detailed pic when I'm up on the roof again.
c0801dabf58f532969ee9616baa53d51.jpg
 
Where are you getting it from and who's doing the install?
What's the pricing like?
 
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