Good afternoon staff

I have a small water leak in the garage which is driving me crackers as I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

Steve

In message , Mr Pounder
writes
Good afternoon staff

I have a small water leak in the garage which is driving me crackers as I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

How many years?

This the time of year (mild days and frosty nights) when you might
expect condensation on the underside of a single skin roof. Worse if the
car is put away wet or the door left open during the day.

Cement bonded asbestos is supposed to be good as the porosity allows
small amounts of condensation to be absorbed and then evaporated when
things warm up. 30 year old stuff may be so porous the moisture is
unable to evaporate before the next cycle starts. One clue is drips that
form where purlins touch the underside.

Alternatively, cracks hidden under moss?



Steve



--
Tim Lamb

"Tim Lamb" wrote in message
...
In message , Mr Pounder
writes
Good afternoon staff

I have a small water leak in the garage which is driving me crackers as I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

How many years?

I don't really know.
There is not a damp course. I would guess it has been there for a good 40
years.

This the time of year (mild days and frosty nights) when you might expect
condensation on the underside of a single skin roof. Worse if the car is
put away wet or the door left open during the day.

Ahhhh yes.
I have a habit of leaving the door open all day. The car won't fit into the
garage due to all of my junk; sorry, tools and things :-)

Cement bonded asbestos is supposed to be good as the porosity allows small
amounts of condensation to be absorbed and then evaporated when things
warm up. 30 year old stuff may be so porous the moisture is unable to
evaporate before the next cycle starts. One clue is drips that form where
purlins touch the underside.

Alternatively, cracks hidden under moss?

No cracks that I can see. There is moss but I can't get to it.

Thanks.

On 08/12/2012 15:14, Mr Pounder wrote:
Good afternoon staff

I have a small water leak in the garage which is driving me crackers as I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

Steve


In a word....yes.

"Bod" wrote in message
...
On 08/12/2012 15:14, Mr Pounder wrote:
Good afternoon staff

I have a small water leak in the garage which is driving me crackers as I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

Steve


In a word....yes.

What can be done about this?

On Dec 8, 3:51*pm, "Mr Pounder" wrote:
"Bod" wrote in message

...

On 08/12/2012 15:14, Mr Pounder wrote:
Good afternoon staff

I have a small water leak in the garage which is driving me crackers as I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

Steve

In a word....yes.

What can be done about this?

If you can find an actual leak/crack, first drill a hole to stop it
propagating.
Then fix with Flashband. It needs to be dry/warm weather. Clean up
with wire brush and use the black gunge primer first.
Watch out for the dust, not good for you.

If porous (never had this problem), bitumous paint on the outside

"harry" wrote in message
...
On Dec 8, 3:51 pm, "Mr Pounder" wrote:
"Bod" wrote in message

...

On 08/12/2012 15:14, Mr Pounder wrote:
Good afternoon staff

I have a small water leak in the garage which is driving me crackers as
I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

Steve

In a word....yes.

What can be done about this?

If you can find an actual leak/crack, first drill a hole to stop it
propagating.
Then fix with Flashband. It needs to be dry/warm weather. Clean up
with wire brush and use the black gunge primer first.
Watch out for the dust, not good for you.

If porous (never had this problem), bitumous paint on the outside

I can't find the leak!
But re - Tim I have always had the door open. I have just discovered that
the walls are wet.
I have have sparked of my old dehumidifer which is reading 99% humidity.

Taa for the reply.

On 08/12/2012 15:51, Mr Pounder wrote:
"Bod" wrote in message
...
On 08/12/2012 15:14, Mr Pounder wrote:
Good afternoon staff

I have a small water leak in the garage which is driving me crackers as I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

Steve


In a word....yes.

What can be done about this?


It's difficult to cover asbestos with bitumen etc once the asbestos is
holding water like a sponge. Very difficult to dry it out completely.
Get rid of the nasty stuff.
Best to re-roof it and be done with it.

"Bod" wrote in message
...
On 08/12/2012 15:51, Mr Pounder wrote:
"Bod" wrote in message
...
On 08/12/2012 15:14, Mr Pounder wrote:
Good afternoon staff

I have a small water leak in the garage which is driving me crackers as
I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

Steve


In a word....yes.

What can be done about this?


It's difficult to cover asbestos with bitumen etc once the asbestos is
holding water like a sponge. Very difficult to dry it out completely. Get
rid of the nasty stuff.
Best to re-roof it and be done with it.

I'm not paying for Paddy to shaft me up.

On Dec 8, 3:14*pm, "Mr Pounder" wrote:
Good afternoon staff

I have a small water leak in the garage which is driving me crackers as I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

Steve

Could be one of the roof fixings, especially if it only happens when
it's windy. (Fixings are on the crest.)
Asbestos cement lasts forever until some one walks on it and breaks
it.

Get some drain dye & mix it up in a bucket with water. Pour on roof &
go inside to see if/where dye appears.

Does asbestos become porous over the years

Seems to - I used to walk on my garage roof 14 years ago, then I did so three years ago and fell straight through it so be warned!!

"Murmansk" wrote in message
...
Does asbestos become porous over the years

Seems to - I used to walk on my garage roof 14 years ago, then I did so
three years ago and fell straight through it so be warned!!

Sadly one must first check that you are the same (or similar) weight that
you were 14 years ago.
;-)

--
No plan survives contact with the enemy.
[Not even bunny]

Helmuth von Moltke the Elder

(\__/)
(='.'=)
(")_(")

"Murmansk" wrote in message
...
Does asbestos become porous over the years

Seems to - I used to walk on my garage roof 14 years ago, then I did so
three years ago and fell straight through it so be warned!!

This is what I am afraid off.

I am quite a stupid person.

On 08/12/2012 17:10, Murmansk wrote:
Does asbestos become porous over the years

Seems to - I used to walk on my garage roof 14 years ago, then I did so three years ago and fell straight through it so be warned!!


All the fibrous cement roofing panels become brittle over time so you
should never walk on them.

On Sat, 8 Dec 2012 09:10:06 -0800 (PST), Murmansk
wrote:

Does asbestos become porous over the years

Seems to - I used to walk on my garage roof 14 years ago, then I did so three years ago and fell straight through it so be warned!!

Not to put 10 stones on?

"Chris Hogg" wrote in message
...
On Sat, 8 Dec 2012 15:14:22 -0000, "Mr Pounder"
wrote:

Good afternoon staff

I have a small water leak in the garage which is driving me crackers as I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

Steve

Our corrugated asbestos garage roof is about 50 yrs old. The underside
will get condensation on it on really frosty nights that can sometimes
drip, but the usual cause of drips is via the nail holes. The black
plastic seal thingies on the nail heads have gone hard over the years
and no longer make a good seal, and leak when it rains heavily, even
though they're through the crests of the ridges, not the valleys. The
solution was to go over all the nail heads with black Unibond
gutter-seal gunge applied generously. Crawling boards essential while
on the roof. I used large sheets of plywood that I had spare.

--

Chris


Yes and thanks.
The bloke next door has crawling boards but he don't like me too much.
He is a cat man!

In message , Mr Pounder
writes

"Chris Hogg" wrote in message
.. .
On Sat, 8 Dec 2012 15:14:22 -0000, "Mr Pounder"
wrote:

Good afternoon staff

I have a small water leak in the garage which is driving me crackers as I
can't find the source of the leak.
The roof is asbestos.
The asbestos feels damp in places.
Does asbestos become porous over the years?

Steve

Our corrugated asbestos garage roof is about 50 yrs old. The underside
will get condensation on it on really frosty nights that can sometimes
drip, but the usual cause of drips is via the nail holes. The black
plastic seal thingies on the nail heads have gone hard over the years
and no longer make a good seal, and leak when it rains heavily, even
though they're through the crests of the ridges, not the valleys. The
solution was to go over all the nail heads with black Unibond
gutter-seal gunge applied generously. Crawling boards essential while
on the roof. I used large sheets of plywood that I had spare.

--

Chris


Yes and thanks.
The bloke next door has crawling boards but he don't like me too much.
He is a cat man!

A ladder with a plank of wood on the rungs makes a substitute. A
suitably shaped garden hoe can be used to carefully hook out the moss
from the valleys.



--
Tim Lamb