I don't know their reasons, but mine used to come open during high winds
dumping tons of old muck and dust onto my landing. Its now held shut with
duct tape. No nasty whining noises or rattles either. The roof on this
property is open ie it can bee seen there are gaps under the tiles, so one
assumes if that hole was through to the house and a really spectacular wind
came it could blow many tiles off the roof.
Brian

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This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"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?

"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