need a new roof

We have a nice house, with a standard roof over plywood. At least 30 years old. The west facing side is very worn and needs to be replaced. The house is a Mock Tudor. There seems to be 4 options:
1. lay shingles over the existing roof. 2. lay new 30-40 year roof. 3. cover only the west facing roof 4. replace the west facing roof.
Any suggestions on what use as roofing material, under fabric, alternate stuff, like artifical slate material
I will be getting estimates on all the options, don't have them yet and it will be expensive.
We live in Seattle, below the snow lines.
Any help on what to look for, look out for or other ideas would be welcome.
--
les ungerleider



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Can be done if everything is in good shape, not buckles, etc. Tear off is better but add to the cost.

Yep.
In a year or two you will be doing the rest. May be prudent to do it all at one time. Less problems matching, etc.

There are some very nice loking shingles available from the better manufacturers. If yo want something really sharp looking, check them out.

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Edwin Pawlowski wrote:

Hi, I'd remove old shingles to inspect underneath.(why put on extra weight on the roof keeping old layer?; lazy man's job) Install new flashings, if there is any repairs needed do it, then install your choice of new shingles. There are many many choices. This is what I'd do if I plan to live in the house long time. Tony
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scribbled this interesting note:

Why install all new flashings? The assumption you seem to be making is that all the existing flashings are bad. They may not be. 30 year old lead plumbing vent flashings are actually of better quality than similar flashings you can buy today, and far superior to any of the cheap flashings with neoprene seals that are commonly used now. Furnace and water heater flashings commonly rust out and require replacement, to be sure, but not all roof jacks and vents necessarily need to be replaced simply because a new roof is being installed.
One item that needs to be addressed, no matter who performs the work, is that wherever a plane of a roof meets a wall or chimney, that area will have the proper flashing and counter flashing installed. Far too often installers choose to merely tar in these trouble spots with no effort given to doing the job correctly. In these instances leaks develop anytime between immediately and six months to a year. Skylights are another area that never accept any less than a correctly done installation and proper care must be taken to keep you, the homeowner, happy and content!
-- John Willis (Remove the Primes before e-mailing me)
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had the estimator out, will get the 4 estimates in a few days, he feels that the west side is buckling, I can't see any.
The recommended shingles are owens corning oakridge pro series shingles 2002 in one of the grays (we get blackend from a incenerator from the other side of pudget sound, over years). Any comments? questions to ask company? layers under the shingles? zinc? anything else.
Shingles are a once or twice in a lifetime purchase, they are everyday to the contractor!!!
LES UNGERLEIDER
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