Volcanic Ash Proof Windows!

The double glazing industry is always looking for ways to boost sales, so how about:

"VOLCANIC ASH PROOF WINDOWS! PROTECT YOUR HOME FROM THE RAVAGES OF THE EYJAFJALLAJOEKULL VOLCANO. ASH PROOF. PYROCLASTIC FLOW PROOF. LAVA PROOF. THE ULTIMATE IN PROTECTION FROM MOTHER NATURE!"

What do you think? Just rolls of the tongue doesn't it!