Nails used to fasten concrete roofing tiles must penetrate the deck a minimum of how many inches?

For fastening concrete roofing tiles, it's essential that nails penetrate the deck a minimum of 3/4 inch. This depth is significant because it ensures a strong and secure connection between the tiles and the underlying structure. Proper nail penetration helps prevent the roofing tiles from lifting in high winds and provides stability under various weather conditions.

The reasoning behind the specific measurement of 3/4 inch involves ensuring that the nails adequately anchor the tiles without risking damage to the decking material. The fasteners must have sufficient depth to hold the tiles in place while also accommodating for any potential expansion or movement due to temperature fluctuations or other environmental factors.

Choosing a lesser penetration depth, such as 1/2 inch, would not provide enough grip, while a depth of 1 inch or more may risk compromising the integrity of the decking or the tiles themselves. Thus, 3/4 inch is the balance required for optimal performance in securing concrete roofing tiles.