Roof shingles to rave about

When it comes to shingles, there are choices galore. But one of the most attractive from a number of standpoints is the laminated composition shingle. Durable, reasonably priced and compatible with a wide range of architectural styles, laminated shingles have long ago destroyed the notion that composition shingles are suitable only for lower-end housing.

"Composition" refers to the fact that the shingle is made up from a composite of different materials. Most are made up of a flexible and durable fiberglass matt that's blended with asphalt. The fiberglass and asphalt layers are then topped with mineral granules, which give the shingle its durability, weather resistance and color. Virtually all composition shingles carry an Underwriter's Laboratories Class A fire rating, which is the highest available. This makes them a great choice for fire-prone areas as well.

The term "laminated" comes from the way that the shingles are layered. Originally, composition or the older plain asphalt shingles were a single, flat layer. Laminated shingles stack two or three layers together on the same shingle, sometimes uniformly, sometimes randomly. The result is a shingle with more shadow lines and more three-dimensional depth, which is considerably more attractive.

The extra lamination also makes the shingle heavier and denser. This keeps the shingle flatter on the roof, reducing its tendency to curl and making it less likely to be affected by high winds. Each shingle has a strip of adhesive on the back, which is softened by the heat of the sun after installation. This allows the upper shingle to bond to the one below it, sealing it down for additional resistance to wind lifting and ice damming.

The combination of heavier weight, fiberglass matting and thicker granule layers also adds to the shingle's life span and to the length of the warranties offered by the manufacturers. Laminated composition shingles typically offer 30- or 40-year warranties, and some are even higher.

Installation

Laminated composition shingles are installed over a base of plywood or OSB sheathing. A base layer of 15-pound felt is laid over the roof sheathing first. In ice-prone areas, an additional ice protection sheet is installed, extending from the eaves to a point past where the unheated eaves cross over the exterior walls of the house. ...CONTINUED

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