All opinions or methods expressed in the video(s) are personal opinion only and for educational purposes only. Always check current regulations or seek second opinions from other video sources or websites. Anyone working at ANY height should be fully trained and insured to do so and use the correct access equipment. Anyone working on ANY project does so at their own risk!

http://www.fixmyroof.co.uk/roof-vents/

A super short video on what sort of ventilation you can expect from adding a roof tile vent or two in your loft, or attic space.

Here I set off a small smoke bomb inside a loft in a low level roof without strong winds to show how the air circulates under normal conditions.

A video of the installation of roof tile vents can be seen here :    • Roof Ventilation Tile & Bathroom Exha...   if you need it.

For website support for all things roof ventilation related see the very top link, it also has some affiliate links incase you want to buy any vents.

Hope it helps...