The Decking/Roof Assembly:
This is the first layer of support for your roof. Decking is made of several different materials, most often of provides plywood or OSB panels. OSB provide additional protection because shaved layers of wood are compressed with waterproof glue. This creates nearly impenetrable protection from moisture damage if higher layers are compromised.
Weatherproofing/Underlayment: The underlayer covers the frame of the roof. An underlayment is made of a waterproof membrane that acts as your last line of defense against water and your best line of defense against moisture. A poorly fitted underlayment may shrink and tear, fail to remain glued down, or leave open areas of exposure where mold can develop and get inside.
Reinforcement: Reinforcing the weatherproof membrane is key. This is accomplished using a variety of products but is most often done with a polyester, bituminous, elastomer, resin, polypropylene or hybrid layer. This is heavier than the underlayment and provides additional insulation, water-proofing, weight, and puncture protection.
Roof Covering/Surfacing: The roof covering is the final layer. That depends on your needs as a homeowner. Metal, wood, synthetic, clay, asphalt, and concrete are all viable options. Each has its own benefits and drawbacks, and we’ll help you determine which covering meets your aesthetic and durability needs. With the salt-water air coming in from the Puget Sound, we’ll often advise homeowners to stay away from metal.