Friday, August 7, 2009

Asphalt paper, metal flashing, and a Craigslist find!

Due to our Tyvek now been exposed to the elements so long time (20 months?) - and hence rendering this dwelling "the Tyvek House" - I felt it was best and prudent to complement the Tyvek with some good old traditional asphalt paper (60 minutes). And, some claim that Tyvek does not do well with Cedar siding, at least not when they touch. The tannins in the Cedar can break down the Tyvek.

DuPont sort of guarantees Tyvek for three months weather exposure, but even after 20 months no "ill" effects have been detected on our installation - apart from the Tyvek logos being bleached by the sun. No leakages, no rips, no tears. Seem to be holding up quite OK.

But since no one really knows how this Tyvek will perform in 40 years, traditional asphalt paper sort of clears up that issue. Been very thourogh and spent time on getting the new "paper" all the way up under the Tyvek and the flexible window flashing. If there ever will be water, at least it will shed/cascade down the membranes in the right order.

On top of that, the metal flashing under the windows also protrude up under the flexible flashing. Should add a little drawing to indicate how I solved it.

Tomorrow it is time to put up more paper, work on the flashing on top of the windows, and the staple up the "Cedar Breather". If all goes well, window trim should also come up, followed by the first pieces of "real" siding - a historic moment!

When running around for asphalt paper, also picked upo a bunch of 304 grade staineless steel screw at Tacoma Screw, with a handy location not far away from Fast Flashings. I like it when you can shop quality in the neighborhood!

And, instead of running to Lowe's or HomeDepot, I found a perfectly functional miter saw on Craigslist. Didn't even have to drive very far. Maybe not what you're looking at for making an elaborate China cabinet, but more than good enough for window trim and T&G siding.

No comments: