The deck should be dry and flat before starting any shingle job. The underlayment’s that protect the deck are to be properly installed using weather watch or storm guard leak barrier, and also using shingle-mate or deck armor roof deck protection should be laying flat and not buckle up. The drip edge has to be flush to the deck to be considered properly installed. The roof deck protection should be over the eaves and under the rake edge.
Starting to shingle is where you should start the job. The back of the roof, which should be the least visible area to work out any unusual details. Do corner your team; roofers work the fastest when reaching across their bodies. Left handed roofers are faster starting on the right; right handed roofers are faster starting on their left.
The best place to start is working towards the most difficult areas on the roof. Don’t start in the valleys, etc. Using the correct roofing nails is a must. Pick a roofing nail that is corrosion resistant, zinc coated, steel or aluminum for maximum corrosion resistance. For deck penetration a 10 to 12 gauge barbed, smooth or deformed shank for gripping the deck. Holding capacity, nail heads of 3/8″ to 7/16″ in diameter to hold the shingles in the hard winds. The nails should be long enough to penetrate 3/4″ into wood plank decks and long enough to penetrate through plywood decks. GAF-Elk does not recommend the use of staple as fasteners for any shingles on any roof job.
The nails must be driven properly into the shingles. Over driving the nails can damage the shingles which could go right through the shingle causing leakage problems. Shingles may actually slip off of the roof. The shingles are barely held on the roof and can cause major damage to you interior.
Making sure to do some homework and hiring a reputable and experienced roofer will give you all this and peace of mind that your roof can hold up to any inclement weather that may come your way.