wrote:
I am in the process of stripping old shingles, putting plywood over old
sheathing and adding new shingles. The roof is over an attic that was
converted into a bedroom. The current roof has a ridge vent but no
Soffet vents. I was told that the best way to add a soffet vent is to
put strapping down between the plywood and old sheathing in order to
create a ventilation space. Then cut holes in the top of the old
sheating over the eaves. Then put he plywood down, cap the space and
add the vents on the bottom side of the eaves. Is this the correct way
to do this???

Thanks in advance!

I had the *exact* same thing done here at home, they're finishing off
the job inside as we speak.

They tore off the planks 3 ft from the bottom and 3 ft from the top,
put strapping horizontally, then 2 by 4s onto the existing chevrons
effectively raising the roof about 4 inches. Then aspenite, membrane,
shingles, and a couple of static ventilators on top, model 301 as shown
he http://www.ventilation-maximum.com/. That's the ventilation
part.

We're having urethane blown on the inside, about 5.5 inches, so
basically the same principle applies: nailing 2 by 4s to the existing
structure to give more space, urethane everywhere, gypsum, primer,
paint. For the exposed urethane in the storage areas we had this
fireproof coating applied. Yuk.

Oh surprise there was never any ventilation from the soffits in front,
the existing plywood(!) that blocked them was removed so now we're okay
from the soffit right up to the ventilator.

Picture here www.piscines-apollo.com/pictures/roof.jpg and here
www.piscines-apollo.com/pictures/roof1.jpg

If you want more pictures just email back.

Best regards,