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What do you need to know about the basics of Roofing Replacement? (2 Part).

What do you need to know about the basics of Roofing Replacement? (2 Part).

Cost Considerations
Also, several factors go into the cost of a roof, beginning with your choice of roofing materials (ranging from cheap three-tab asphalt shingles up to architectural shingles or even slate). The roofing contractor you choose, the pitch (steepness or your roof), and the square footage of your roof are other factors that affect the cost. Nationally, a typical roof using architectural asphalt shingles costs between $4.50 and $6.50 per square foot—a cost that includes all demolition, permit fees, waste disposal, and cleanup.

Typical average costs of different roofing options:

Three-tab asphalt shingles: $7,000 to $12,000 CAD
30-year shingles: $9,000 to $15,000 CAD
50-year shingles: $11,000 to $20,000 CAD
EPDM rubber: $8,000 to $14,000 CAD
TPO or PVC membrane: $10,000 to $15,000 CAD
Wood shingles: $14,000 to $25,000 CAD
Steel shingles: $14,000 to $25,000 CAD
Aluminum shingles: $15,000 to $28,000 CAD
Standing-seam steel roofing: $23,000 to $30,000 CAD
Natural slate: $25,000 to $50,000 CAD
Concrete tile: $20,000 to $40,000 CAD
Clay tiles: $25,000 to $50,000 CAD

Consider Off-Season Roofing Work
A well-coordinated roofing team is an amazing thing to watch—and this is why we pay them to do our roofs. While in most parts of the U.S. the optimal roofing season is from late spring to early fall, skilled crews are able to extend the work season, sometimes even roofing when snow flurries are threatening. There is no reason, in other words, not to hire a skilled crew to roof your home during off-season periods. You may even enjoy lower prices at these times since the labor demand is low. The trick behind getting your roof job shoehorned into the offseason is having a large team of professional roofers who can knock out the work in hours, instead of days, thus taking advantage of dry periods.

Understand the Roofing Process
You’ll be able to make advised decisions when hiring a roofing crew if you understand the process, as well as the jargon used in the roofing trade.

A moderately-sized, professionally-installed roofing job might take only 3 or 4 days. The overall process followed by the roofing crew goes like this:

Remove all existing shingles, deposit them in a roll-off dumpster. Damaged or old valley flashing and drip edging is also removed at this time. A good crew will use protect foundation plantings and shrubs during tear-off and will use magnetic tools to pick up nails and metal objects from the lawn.
Make minor repairs on the roof if it is in good condition. If not, replace bad wood with new plywood sheathing or 1 x 6 sheathing boards, whichever is applicable to your type of roof.
Install ice dam protection in regions that require it. The ice guard membrane is a synthetic waterproof barrier material designed to prevent melting ice from backing up under the shingles and penetrating through the sheathing, where the moisture can cause severe damage.
Lay down asphalt roofing paper over the roof sheathing. The layer of roofing paper creates an inner barrier against water penetrating into the house. Rows of roofing paper are overlapped as they progress upward toward the peak, and are normally tacked or stapled in place.
Apply metal drip edging around the edge of the roof, both the eave sides and gable sides. The metal drip edge is nailed in place over the roofing paper or ice guard.
Where necessary, apply a new valley flashing along with areas where two roof planes meet. The valley flashing is typically nailed to the roofing deck and sealed with roofing caulk.
Apply the tab shingles, starting at the eaves and working upward toward the peak. Where roof vents are being installed, these are installed as the progress of the shingles toward the peak.
Apply to flash around all areas where leaks might come into the house—against the chimney, around skylights and stack vents, etc. Flashing installation may happen as part of the roofing installation, occurring as the rows of shingles progress upward on the roof deck.
Install the ridge vent. This continuous vent along the peak of the roof will help the air circulation in the attic space and can be integral in exhausting hot air and preventing winter ice dams. Ridge vents may not be included on older roofs, but installing them is a good idea whenever a house is re-roofed. If ridge vents are not practical, the should be other types of roof or gable vents installed to provide air circulation in the attic space.
Complete the final cleanup and haul debris away. Have the installation inspected and approved by a building inspector?
The roofing business uses some special terminology when estimating materials for a roofing job.

The term square, when used in the roofing business, is a unit of area. One square equals 100 square feet.
Shingles come in bundles. Three or four bundles of shingles typically will cover a square of roofing area.

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