I bought a tin of this , the grey gooey stuff with fibres in it, it was
to put a line along where there is an overlap joint in the roof felt
(shed) more as a precaution.
So I have loads left and I wondered if it is likely to be suitable for
weatherproofing the top edge of a wooden fence that has vertical slats,
to stop rain soaking in to the end grain.
Having used it for the shed roof I am thinking it would maybe add some
extra life to the fence but dont want to waste my time if it does not
offer some protection.
The slats are mainly reclaimed wood from a neighbours fence that blew
down so wood will be several years old.

On 22/03/2016 21:42, ss wrote:
I bought a tin of this , the grey gooey stuff with fibres in it, it was
to put a line along where there is an overlap joint in the roof felt
(shed) more as a precaution.
So I have loads left and I wondered if it is likely to be suitable for
weatherproofing the top edge of a wooden fence that has vertical slats,
to stop rain soaking in to the end grain.
Having used it for the shed roof I am thinking it would maybe add some
extra life to the fence but dont want to waste my time if it does not
offer some protection.
The slats are mainly reclaimed wood from a neighbours fence that blew
down so wood will be several years old.

As with anything where the application has not been tested and
documented by the manufacturer you'll just have to do it and report back
in few years whether it worked.

Bill

On Tue, 22 Mar 2016 21:42:12 +0000, ss wrote:

So I have loads left and I wondered if it is likely to be suitable for
weatherproofing the top edge of a wooden fence that has vertical slats,
to stop rain soaking in to the end grain.

Assuming that these slats aren't in a place that is always damp or
you have rain every day and they in free air and can thus dry out
they'll last a long time as plain wood. Being ex fence presumably
they are also treated (preservative) timber, last even longer.

The various rots that affet wood have a fairly narrow tolerance when
it comes to how damp the timber is. Too wet (buried in normally wet
ground), no good, too dry (out in the air) no good, this is why posts
rot just above ground level, the timber dampness is just right
between the two "no good" zones.

Putting a waterproof cap on might be a mistake as it'll trap water in
the timber. How does it get under that cap? Capilary action from the
sides.

--
Cheers
Dave.

On 23/03/2016 09:10, Dave Liquorice wrote:
Putting a waterproof cap on might be a mistake as it'll trap water in
the timber. How does it get under that cap? Capilary action from the
sides.

That makes sense, maybe best I leave alone.

"ss" wrote in message
...
On 23/03/2016 09:10, Dave Liquorice wrote:
Putting a waterproof cap on might be a mistake as it'll trap water in
the timber. How does it get under that cap? Capilary action from the
sides.

That makes sense, maybe best I leave alone.

And the other point is that if it really did improve
the life of the wood, you'd expect some would do
it that way and when they don’t, it's unlikely to help.

On 23/03/2016 18:15, Rod Speed wrote:


"ss" wrote in message
...
On 23/03/2016 09:10, Dave Liquorice wrote:
Putting a waterproof cap on might be a mistake as it'll trap water in
the timber. How does it get under that cap? Capilary action from the
sides.

That makes sense, maybe best I leave alone.

And the other point is that if it really did improve
the life of the wood, you'd expect some would do
it that way and when they don’t, it's unlikely to help.

I have about 9 tenths of a tin left and it could be years before I need
to use it again so just trying to find other uses for it. :-(

On Wednesday, 23 March 2016 21:12:43 UTC, ss wrote:
On 23/03/2016 18:15, Rod Speed wrote:
"ss" wrote in message
...
On 23/03/2016 09:10, Dave Liquorice wrote:
Putting a waterproof cap on might be a mistake as it'll trap water in
the timber. How does it get under that cap? Capilary action from the
sides.

That makes sense, maybe best I leave alone.

And the other point is that if it really did improve
the life of the wood, you'd expect some would do
it that way and when they don't, it's unlikely to help.

I have about 9 tenths of a tin left and it could be years before I need
to use it again so just trying to find other uses for it. :-(

bitumen has loads of uses. There's a wiki page on it fwiw.

AIUI fence slats rely on drying out to avoid mould, so bitumen would make that worse.


NT

"ss" wrote in message
...
On 23/03/2016 18:15, Rod Speed wrote:


"ss" wrote in message
...
On 23/03/2016 09:10, Dave Liquorice wrote:
Putting a waterproof cap on might be a mistake as it'll trap water in
the timber. How does it get under that cap? Capilary action from the
sides.

That makes sense, maybe best I leave alone.

And the other point is that if it really did improve
the life of the wood, you'd expect some would do
it that way and when they don’t, it's unlikely to help.

I have about 9 tenths of a tin left and it could be years before I need to
use it again so just trying to find other uses for it. :-(

Sure, but it makes more sense to freecycle it etc.