And other last minute Qs from a DIY-er. We’re almost done with the decking/joist… pretty soon it’ll be roof time…
Here is where we are at (PLEASE PLEASE PLEASE let us know if we got something wrong!)
Tar Monkey had suggested a 3-ply for a slope shallower than 3/12 (that’s read as 3in over 12 feet, right?) Our roof is 5in over 20 feet. So do a 2-ply or 3 ply system? Better to err on 3-ply?
Also, laying down a mechanically attached base sheet should make it easier to reroof in the far future, right?
This is over a 1/2" plywood deck.
So we need to manually nail down a ply of the Liberty MA Base sheet?
Then, 1 ply of the Liberty Base/Ply Sheet (which is Peel-n-stick, right?)
And then 1 ply of the Liberty Cap Sheet (which is also Peen-n-Stick, right?)
Now the detail questions:
GAF Flashing Cement (Matrix 201) and Asphalt Primer (Matrix 307) – how do these items compare to the Karnak brand’s flashing cement and asphalt primer? Will there be a compatibility issue with the Liberty Peel-n-stick?
Cant strip - Do you guys make your own 45-degree wood cants? Do you actually buy the cant strips i.e. “Energyguard cant” as detailed in the GAF instructions? Is there some way to make your own? Run them on a table saw at a 45-degree using a 4x4 pressure-treated post seems like it would take too may passes…
Is a weight hand roller (for the seams) necessary? Okay just to walk (toe-to-heel) along the seam (220lb person?)
Prepping parapet – right now there is old black (tar?) stuff on the CMU/Brick parapets. I assume there is no real way to clean it off so just put Asphalt Primer all over first?
CMU parapet has open holes on top – do I need to put down metal flashing over those holes, before laying down asphalt primer and then base&cap?