Grills are the weakest form of security and gives you nothing but a false sense of security. Laminated glass is way way more resistance to force entry

True that tempered glass has more strength than laminated but for home security purposes, I think you want laminated glass

this article i found explains it better than me -

Tempered glass is not designed to resist breaking. Instead, it is intended to prevent or minimize injury upon breaking by shattering into thousands of small, blunt pieces instead of razor-sharp shards. In terms of residential security, tempered glass is not ideal because it will break easily and with little noise. Laminated glass is harder to break than tempered because when impacted, the PVB layer remains inside the frame and the glass fragments stay adhered to this layer. This makes it difficult to break without a lot of noise and glass cutters will also not be able to cut it from the outside.

Read more: Tempered Glass vs. Laminated Glass for Residential Use | eHow.com http://www.ehow.com/info_12150924_tempered...l#ixzz1tfZUjff8