On Tue, 07 Jan 2020 20:35:23 -0000, 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.

The conservatory I've half built is staying firmly put. I guess I bolted it together well :-)

"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