On Tue, 8 Jun 2010 16:48:42 -0700 (PDT), "
wrote:

On Jun 8, 7:26?pm, wrote:
On Tue, 08 Jun 2010 17:28:04 -0400, frank1492
wrote:

In small buildings (such as a shed) what is the downside to covering
the entire roof with aluminum flashing before shingling? Perhaps
expensive? That's the only thing I can think of.
? ? Any other negatives?
? ? I want to protect the wood indefinitely.
? ?Thanks.
? ? ? ? Frank ?

No negatives, just no point to it.
If you're willing to pay for that, just put on a metal roof. ?It's
likely to be cheaper in the end, and it will outlast all shingles.
It's not that hard to install either on a small and low shed without a
lot of gables and stuff. ?All you need is the metal, neoprene screws,
a power drill with 1/4" hex tip, and a tin snips. Smaller sheets of
steel are lighter than shingles too.

bithane rather than tar paper. it sticks to the wood and all nail
holes are self sealing

its expensive but worth it espically if your covering chipboard, which
disengrates if it gets wet

Using chipboard on a roof is just plain stupid. Eventually all roofs
will leak, especially shingles. By the time the leak is noticed the
chipboard is usually ruined. So instead of applying some tar or a
couple new shingles, you end up ripping the whole roof apart. Not
only that, but shingle nails dont hold well in the stuff.

Personally I dont think much about chipboard for ANY buildings. Water
gets to it and its shot. Its fine for cheap cabinets and furniture,
but not for roofs or floors. When I was in the repair business, I was
constantly replacing large sections of floor in mobile homes because
most of them use that crap for the floor. I put my leg thru more than
one of those floors. Usually by doors or in bathrooms. I'd patch
them with 3/4" plywood, and cover the whole floor with 1/2" plywood.

Now, what is bithane? I never heard of it.