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bhc65 02-28-2007 12:26 AM

base sheet
nailing down the base there are two options ..plastic cap nails or metal cap nails. I been told metal cap nail rust then fail after a period. However I think plastic cap nails would also fail under the heat..anyone have any thoughts

roofwiz74 02-28-2007 07:57 AM

metal.rust?I've tore off 40 yr old flat roofs and the metal cap nails holding on the base sheet were still shiny.
plastic caps are good for shingle felt and tyvek.I usually roof the same day so I use staples.lots faster.
if you are doing a flat roof I don't recommend plastic caps.and any kind of hot roof you can't use plastic.
did you know that there are certain number of fastners and placement for differant wind applications.

bhc65 02-28-2007 09:33 AM

I'm looking to apply a base sheet on a 2/12 roof. w/henrys lo slope peel and stick. I also live in the islands where there a lot of moisture and an occasional hurricane. maybe thats why some have said the metal cap nails rust and fail

roofwiz74 02-28-2007 10:12 PM

yeah could be.I'd use the plastic caps.

make sure to put plenty in and stagger them well.edges real well.

bhc65 03-01-2007 02:09 AM

Base sheet
Thanks for the info. after close examination looks like there is a base then then hot mopped. one other question

do i put the base sheet on then apply the drip edge all the way around the eaves and rakes. or do nail the drip edge along the eave first ..nail down the base sheet... according to some roofing says to nail the drip edge over the eave first. then nail the base sheet down..then nail the drip edge over the rake so it hold the base sheet down along the rake edge. the way it sounds is along the eave the base sheet is nailed on top of the drip edge and NOT put underneat it like the rake..doesnt make sense. I would think one would put the base sheet down first then nail the drip OVER the base sheet along the eave and rake holding it down better than nails along the edge. sorry about the long post

RooferJim 03-01-2007 07:53 PM

If your not going to hot mop it, plastic cap nails "buttons" in roofer lingo, are great.


roofwiz74 03-01-2007 10:54 PM

all the roofing goes on before any kind of flashing.base sheet and all.then put on your drip,pipe boots,termination bar,counter flashings,whatever.then you flash in the drip with a 2' strip.use cement under your flashing and above.they sell a metal primer also.when you do the pipe boot cut a 3'x3' target patch to fit over the pipe.if you can't do it in one,do it 2 piece and lap them over another.

AaronB 03-03-2007 09:42 AM

If youre using self adhered, I would use a self-adhered base, also.

If youre using a mopped application, I would use a steel cap nail.

Any of them...I would lat the roof field, turn it down the outside edge, nail it, and then install a primed 4"x4" steel perimeter flashing, primed, screwed, and cover stripped.

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