Sunday, November 21, 2010

Roof Replacement

During a rear porch conversion, it became apparent that finishing a room under a roof that has had water issues was not a great idea.  The homeowners had plans of replacing the whole roof next year.  We offered to just replace the roof slopes connected to the rear porch so that we could all be assured that their new room would face ice damming and leak issues.

Hopefully, the homeowners will hire us back next year to complete the roof.  But, in any case we feel good about our decision to save the homeowners some money this year (by only replacing some of the roof) and make sure that the new room has a new roof overhead.

Our roofing system uses ice and water shield on the eaves, rakes and valleys.  Ice and water has a sticky backing that adheres to the roof sheathing and seals around the nails that secure the shingles.  Its main job is to protect against ice dams and wind driven rain.

We also include a synthetic underlayment as opposed to tar paper.  The synthetic underlayment weighs less (good for your roof) and helps keep the roof and thus attic cooler - this prolongs the shingle life.  It is also resistant to any mold or mildew growth as well as protects against moisture making it to the roof sheathing.

The ice and water should overlap the drip edge (the bottom metal strip), but be installed under the rake edge (the metal going up the sides).  The rake edge metal then gets installed over the ice and water and synthetic underlayment.  This way any wind driven rain that gets under the shingles from the side will channel down the underlayment (not in contact with the roof sheathing) and drain out the bottom over the drip edge into the gutter.


See the photos to the right.  The top photo shows the ice and water installed on the eaves (bottom of roof) and up the valley.  At the very bottom you can see the white drip edge that the ice and water overlaps.  The bottom photo shows the synthetic underlayment under the rake edge metal (the white showing at the edge of the roof) and overlapped per the manufacturers instructions to shed water all the way down the roof.
Coming up next will be photos of the roof replacement from start to finish

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