Proper Breathability is Ensured with GAF Deck Armor®
A Roof that doesn't breath properly will trap moisture in your attic, which well then be absorbed into the wood of your roof decking. This can cause the wood to rot, and may ultimately make outright replacement necessary. Tar paper, which is the traditional breathable layer between shingles and roof decking, has a number of downsides: it absorbs water and often becomes rippled, negatively impacting the appearance of your roof, and it's breathability is limited. Deck Armor® by GAF, on the other hand, is far more breathable and will never ripple or bubble up.