On Wed, 8 Jan 2020 17:42:21 +0000, Steve ******, the notorious,
troll-feeding, senile idiot, blathered again:

What of the possibility of air being able to rush from the house into
the reduced pressure of the loft, so suddenly changing the differential
pressure between the inside and outside of the roof and making it more
likely that the roof is damaged or ripped off?

SteveW

Just what kind of a troll cock sucking senile asshole are you, Steve ******?
tsk

On Thu, 9 Jan 2020 05:37:13 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:


It doesn't work like that

Doesn't it, you auto-contradicting senile pest? LOL

--
Kerr-Mudd,John addressing senile Rot:
"Auto-contradictor Rod is back! (in the KF)"
MID:

On 07/01/2020 20:35, Rod Speed wrote:


"Commander Kinsey" wrote in message
newsp.0d1gkmz9wdg98l@glass...

Why secure a loft trapdoor in a storm?

And what's the roof pitch to do with anything?

In theory you can get a suction effect similar to
what you get with an aircraft aerofoil section.

In practice it isnt seen often enough to matter.

"Close and secure loft trapdoors with bolts, particularly if roof
pitch is less than 30°"

https://www.metoffice.gov.uk/weather...afe-in-a-storm


I agree. A low pressure from the outside will pull on a roof's attic
space to try to equalise with the internal pressure of the attic/home.

If the roof opens a pathway is created. If the attic door opens,
another pathway is created. This very small pathway then becomes subject
to the mass of air in the home. This mass compresses and speeds up as it
passes through the smaller hole and can be a very strong rush of air.

On Fri, 10 Jan 2020 06:24:53 -0000, RayL12 wrote:

On 07/01/2020 20:35, Rod Speed wrote:


"Commander Kinsey" wrote in message
newsp.0d1gkmz9wdg98l@glass...

Why secure a loft trapdoor in a storm?

And what's the roof pitch to do with anything?

In theory you can get a suction effect similar to
what you get with an aircraft aerofoil section.

In practice it isnt seen often enough to matter.

"Close and secure loft trapdoors with bolts, particularly if roof
pitch is less than 30°"

https://www.metoffice.gov.uk/weather...afe-in-a-storm


I agree. A low pressure from the outside will pull on a roof's attic
space to try to equalise with the internal pressure of the attic/home.

If the roof opens a pathway is created. If the attic door opens,
another pathway is created. This very small pathway then becomes subject
to the mass of air in the home. This mass compresses and speeds up as it
passes through the smaller hole and can be a very strong rush of air.

For all that to happen, you have to lose part of your roof. This is unlikely, and if it did happen, an opening loft hatch would be the least of your worries. If the roof doesn't fail, the pressure of air in the loft and the house both remain at 14psi, so no hatch moving.

"Commander Kinsey" wrote in message
newsp.0d7j8jwgwdg98l@glass...
On Fri, 10 Jan 2020 06:24:53 -0000, RayL12 wrote:

On 07/01/2020 20:35, Rod Speed wrote:


"Commander Kinsey" wrote in message
newsp.0d1gkmz9wdg98l@glass...

Why secure a loft trapdoor in a storm?

And what's the roof pitch to do with anything?

In theory you can get a suction effect similar to
what you get with an aircraft aerofoil section.

In practice it isnt seen often enough to matter.

"Close and secure loft trapdoors with bolts, particularly if roof
pitch is less than 30°"

https://www.metoffice.gov.uk/weather...afe-in-a-storm


I agree. A low pressure from the outside will pull on a roof's attic
space to try to equalise with the internal pressure of the attic/home.

If the roof opens a pathway is created. If the attic door opens,
another pathway is created. This very small pathway then becomes subject
to the mass of air in the home. This mass compresses and speeds up as it
passes through the smaller hole and can be a very strong rush of air.

For all that to happen, you have to lose part of your roof.

Nope, tiled roofs arent airtight.

This is unlikely,

Plenty of tiles come off in strong winds.

and if it did happen, an opening loft hatch would be the least of your
worries.

Wrong again when the open hatch makes
it more likely that tiles will come off.

If the roof doesn't fail, the pressure of air in the loft and
? the house both remain at 14psi, so no hatch moving.

Tiled roofs arent airtight.

On Sat, 11 Jan 2020 17:12:12 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the two clinically insane assholes' latest troll**** unread again

--
Another typical retarded conversation between our two village idiots,
Birdbrain and Rodent Speed:

Birdbrain: "You beat me to it. Plain sex is boring."

Senile Rodent: "Then **** the cats. That wont be boring."

Birdbrain: "Sell me a de-clawing tool first."

Senile Rodent: "Wont help with the teeth."

Birdbrain: "They've never gone for me with their mouths."

Rodent Speed: "They will if you are stupid enough to try ****ing them."

Birdbrain: "No, they always use claws."

Rodent Speed: "They wont if you try ****ing them. Try it and see."

Message-ID:

On 11/01/2020 3:06, Commander Kinsey wrote:
On Fri, 10 Jan 2020 06:24:53 -0000, RayL12 wrote:

On 07/01/2020 20:35, Rod Speed wrote:


"Commander Kinsey" wrote in message
newsp.0d1gkmz9wdg98l@glass...

Why secure a loft trapdoor in a storm?

And what's the roof pitch to do with anything?

In theory you can get a suction effect similar to
what you get with an aircraft aerofoil section.

In practice it isnt seen often enough to matter.

"Close and secure loft trapdoors with bolts, particularly if roof
pitch is less than 30°"

https://www.metoffice.gov.uk/weather...afe-in-a-storm



I agree. A low pressure from the outside will pull on a roof's attic
space to try to equalise with the internal pressure of the attic/home.

If the roof opens a pathway is created. If the attic door opens,
another pathway is created. This very small pathway then becomes subject
to the mass of air in the home. This mass compresses and speeds up as it
passes through the smaller hole and can be a very strong rush of air.

For all that to happen, you have to lose part of your roof. This is
unlikely, and if it did happen, an opening loft hatch would be the least
of your worries. If the roof doesn't fail, the pressure of air in the
loft and the house both remain at 14psi, so no hatch moving.

Correct, it's all about 2 pressures wanting to equalise. Whether you
lose your roof and even your loft door depends on the pressure
difference and the speed it presents itself and, the time it exists. If
your roof and ceilings structure cannot allow the equalisation to
happen, the forces that keep them to your building can be overcome.

On Mon, 13 Jan 2020 16:38:17 +0000, RayL12, another brain dead,
troll-feeding, senile idiot, blathered again:


Correct, it's all about 2 pressures wanting to equalise.

Nope, senile idiot, it's all about him setting out baits for senile assholes
like you and you taking them every time! It's NOTHING else!

On Mon, 13 Jan 2020 16:38:17 -0000, RayL12 wrote:

On 11/01/2020 3:06, Commander Kinsey wrote:
On Fri, 10 Jan 2020 06:24:53 -0000, RayL12 wrote:

On 07/01/2020 20:35, Rod Speed wrote:


"Commander Kinsey" wrote in message
newsp.0d1gkmz9wdg98l@glass...

Why secure a loft trapdoor in a storm?

And what's the roof pitch to do with anything?

In theory you can get a suction effect similar to
what you get with an aircraft aerofoil section.

In practice it isnt seen often enough to matter.

"Close and secure loft trapdoors with bolts, particularly if roof
pitch is less than 30°"

https://www.metoffice.gov.uk/weather...afe-in-a-storm



I agree. A low pressure from the outside will pull on a roof's attic
space to try to equalise with the internal pressure of the attic/home.

If the roof opens a pathway is created. If the attic door opens,
another pathway is created. This very small pathway then becomes subject
to the mass of air in the home. This mass compresses and speeds up as it
passes through the smaller hole and can be a very strong rush of air..

For all that to happen, you have to lose part of your roof. This is
unlikely, and if it did happen, an opening loft hatch would be the least
of your worries. If the roof doesn't fail, the pressure of air in the
loft and the house both remain at 14psi, so no hatch moving.

Correct, it's all about 2 pressures wanting to equalise. Whether you
lose your roof and even your loft door depends on the pressure
difference and the speed it presents itself and, the time it exists. If
your roof and ceilings structure cannot allow the equalisation to
happen, the forces that keep them to your building can be overcome.

My point is.... assuming your roof is still on firmly, there is very little pressure difference between your house and your attic. So no reason for the trapdoor to move.

"Commander Kinsey" wrote in message
newsp.0echhscgwdg98l@glass...
On Mon, 13 Jan 2020 16:38:17 -0000, RayL12 wrote:

On 11/01/2020 3:06, Commander Kinsey wrote:
On Fri, 10 Jan 2020 06:24:53 -0000, RayL12 wrote:

On 07/01/2020 20:35, Rod Speed wrote:


"Commander Kinsey" wrote in message
newsp.0d1gkmz9wdg98l@glass...

Why secure a loft trapdoor in a storm?

And what's the roof pitch to do with anything?

In theory you can get a suction effect similar to
what you get with an aircraft aerofoil section.

In practice it isnt seen often enough to matter.

"Close and secure loft trapdoors with bolts, particularly if roof
pitch is less than 30°"

https://www.metoffice.gov.uk/weather...afe-in-a-storm



I agree. A low pressure from the outside will pull on a roof's attic
space to try to equalise with the internal pressure of the attic/home.

If the roof opens a pathway is created. If the attic door opens,
another pathway is created. This very small pathway then becomes
subject
to the mass of air in the home. This mass compresses and speeds up as
it
passes through the smaller hole and can be a very strong rush of air.

For all that to happen, you have to lose part of your roof. This is
unlikely, and if it did happen, an opening loft hatch would be the least
of your worries. If the roof doesn't fail, the pressure of air in the
loft and the house both remain at 14psi, so no hatch moving.

Correct, it's all about 2 pressures wanting to equalise. Whether you
lose your roof and even your loft door depends on the pressure
difference and the speed it presents itself and, the time it exists. If
your roof and ceilings structure cannot allow the equalisation to
happen, the forces that keep them to your building can be overcome.

My point is.... assuming your roof is still on firmly, there is very
little pressure difference between your house and your attic.

That's just plain wrong with the lower pitched
roofs and strong winds in the right direction.

So no reason for the trapdoor to move.

Pity they do in the real world.

On Mon, 13 Jan 2020 19:55:16 -0000, Rod Speed wrote:



"Commander Kinsey" wrote in message
newsp.0echhscgwdg98l@glass...
On Mon, 13 Jan 2020 16:38:17 -0000, RayL12 wrote:

On 11/01/2020 3:06, Commander Kinsey wrote:
On Fri, 10 Jan 2020 06:24:53 -0000, RayL12 wrote:

On 07/01/2020 20:35, Rod Speed wrote:


"Commander Kinsey" wrote in message
newsp.0d1gkmz9wdg98l@glass...

Why secure a loft trapdoor in a storm?

And what's the roof pitch to do with anything?

In theory you can get a suction effect similar to
what you get with an aircraft aerofoil section.

In practice it isnt seen often enough to matter.

"Close and secure loft trapdoors with bolts, particularly if roof
pitch is less than 30°"

https://www.metoffice.gov.uk/weather...afe-in-a-storm



I agree. A low pressure from the outside will pull on a roof's attic
space to try to equalise with the internal pressure of the attic/home.

If the roof opens a pathway is created. If the attic door opens,
another pathway is created. This very small pathway then becomes
subject
to the mass of air in the home. This mass compresses and speeds up as
it
passes through the smaller hole and can be a very strong rush of air.

For all that to happen, you have to lose part of your roof. This is
unlikely, and if it did happen, an opening loft hatch would be the least
of your worries. If the roof doesn't fail, the pressure of air in the
loft and the house both remain at 14psi, so no hatch moving.

Correct, it's all about 2 pressures wanting to equalise. Whether you
lose your roof and even your loft door depends on the pressure
difference and the speed it presents itself and, the time it exists. If
your roof and ceilings structure cannot allow the equalisation to
happen, the forces that keep them to your building can be overcome.

My point is.... assuming your roof is still on firmly, there is very
little pressure difference between your house and your attic.

That's just plain wrong with the lower pitched
roofs and strong winds in the right direction.

The amount of air travelling through the gap in the eaves isn't enough to change the pressure in the attic so it's a big difference from the rest of the house to cause the trapdoor to move.

So no reason for the trapdoor to move.

Pity they do in the real world.

Mine never has. But then it's proper wood, not flimsy modern plastic.

"Commander Kinsey" wrote in message
newsp.0eclstw7wdg98l@glass...
On Mon, 13 Jan 2020 19:55:16 -0000, Rod Speed
wrote:



"Commander Kinsey" wrote in message
newsp.0echhscgwdg98l@glass...
On Mon, 13 Jan 2020 16:38:17 -0000, RayL12 wrote:

On 11/01/2020 3:06, Commander Kinsey wrote:
On Fri, 10 Jan 2020 06:24:53 -0000, RayL12
wrote:

On 07/01/2020 20:35, Rod Speed wrote:


"Commander Kinsey" wrote in message
newsp.0d1gkmz9wdg98l@glass...

Why secure a loft trapdoor in a storm?

And what's the roof pitch to do with anything?

In theory you can get a suction effect similar to
what you get with an aircraft aerofoil section.

In practice it isnt seen often enough to matter.

"Close and secure loft trapdoors with bolts, particularly if roof
pitch is less than 30°"

https://www.metoffice.gov.uk/weather...afe-in-a-storm



I agree. A low pressure from the outside will pull on a roof's
attic
space to try to equalise with the internal pressure of the
attic/home.

If the roof opens a pathway is created. If the attic door opens,
another pathway is created. This very small pathway then becomes
subject
to the mass of air in the home. This mass compresses and speeds up as
it
passes through the smaller hole and can be a very strong rush of air.

For all that to happen, you have to lose part of your roof. This is
unlikely, and if it did happen, an opening loft hatch would be the
least
of your worries. If the roof doesn't fail, the pressure of air in the
loft and the house both remain at 14psi, so no hatch moving.

Correct, it's all about 2 pressures wanting to equalise. Whether you
lose your roof and even your loft door depends on the pressure
difference and the speed it presents itself and, the time it exists. If
your roof and ceilings structure cannot allow the equalisation to
happen, the forces that keep them to your building can be overcome.

My point is.... assuming your roof is still on firmly, there is very
little pressure difference between your house and your attic.

That's just plain wrong with the lower pitched
roofs and strong winds in the right direction.

The amount of air travelling through the gap in the eaves

That isnt the problem. The problem is the aerofoil effect
you can get with some roofs which arent airtight.

isn't enough to change the pressure in the attic

That's wrong too with some eaves designs.

so it's a big difference from the rest of the house to cause the trapdoor
to move.

Utterly mangled all over again.

So no reason for the trapdoor to move.

Pity they do in the real world.

Mine never has.

Because yours isnt a low enough pitch to get the aerofoil effect.

But then it's proper wood, not flimsy modern plastic.

Nothing to do with the construction of it.

On Tue, 14 Jan 2020 06:55:16 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH the two abnormal cretins' endless sick troll****

--
Typical retarded "conversation" between the Scottish ****** and the senile
Ozzietard:

Birdbrain: "Horse **** doesn't stink."

Senile Rodent: "It does if you roll in it."

Birdbrain: "I've never worked out why, I assumed it was maybe meateaters
that made stinky ****, but then why does vegetarian human **** stink? Is it
just the fact that we're capable of digesting meat?"

Senile Rodent: "Nope, some cow **** stinks too."

Message-ID:

On Tue, 14 Jan 2020 08:21:57 +1100, cantankerous trolling geezer Rodent
Speed, the auto-contradicting senile sociopath, blabbered, again:

FLUSH another 95 !!! lines of the usual absolutely idiotic troll**** unread
again

--
Another typical retarded "conversation" between Birdbrain and senile Rodent:

Senile Rodent: " Did you ever dig a hole to bury your own ****?"

Birdbrain: "I do if there's no flush toilet around."

Senile Rodent: "Yeah, I prefer camping like that, off by myself with
no dunnys around and have always buried the ****."

MID:

On 13/01/2020 18:12, Peeler wrote:
On Mon, 13 Jan 2020 16:38:17 +0000, RayL12, another brain dead,
troll-feeding, senile idiot, blathered again:


Correct, it's all about 2 pressures wanting to equalise.

Nope, senile idiot, it's all about him setting out baits for senile assholes
like you and you taking them every time! It's NOTHING else!



OK Peeler, got it. Thank you. You dont have to tell me again.

Damn, look, you did it to me too.