I have a large front porch with a roof about 8 feet up. It is open on
the bottom so you see the sheathing and joists (2x6's). When the sun is
on it the heat really radiates down to the porch area making it hot as
hell even though you are in the shade.

I am considering putting up a "ceiling" but good circulation won't be
easy without a fan. The porch roof extends about 10 feet over the
original roof and shingles of the house so I suppose I could close it up
and add a fan. If I do it I'm thinking of using 3.5" insulation so
there is plenty of room for air circulation between the insulation and
the sheathing.

Any other ideas before I get broiled?

Tony

Tony wrote:
I have a large front porch with a roof about 8 feet up. It is open on
the bottom so you see the sheathing and joists (2x6's). When the sun
is on it the heat really radiates down to the porch area making it
hot as hell even though you are in the shade.

I am considering putting up a "ceiling" but good circulation won't be
easy without a fan. The porch roof extends about 10 feet over the
original roof and shingles of the house so I suppose I could close it
up and add a fan. If I do it I'm thinking of using 3.5" insulation so
there is plenty of room for air circulation between the insulation and
the sheathing.

Any other ideas before I get broiled?

Tony

Forget the insulation.

Radiant barrier. Cheap, 95% effective, easy to install.

HeyBub wrote:
Tony wrote:
I have a large front porch with a roof about 8 feet up. It is open on
the bottom so you see the sheathing and joists (2x6's). When the sun
is on it the heat really radiates down to the porch area making it
hot as hell even though you are in the shade.

I am considering putting up a "ceiling" but good circulation won't be
easy without a fan. The porch roof extends about 10 feet over the
original roof and shingles of the house so I suppose I could close it
up and add a fan. If I do it I'm thinking of using 3.5" insulation so
there is plenty of room for air circulation between the insulation and
the sheathing.

Any other ideas before I get broiled?

Tony

Forget the insulation.

Radiant barrier. Cheap, 95% effective, easy to install.

What kind of radiant barrier? I don't want it to look like aluminum
foil. Maybe I could use the radiant barrier instead of insulation then
the sheathing under that for looks.

Tony

Look good. Cook in the summer. What a choice.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"Tony" wrote in message
...

What kind of radiant barrier? I don't want it to look like
aluminum
foil. Maybe I could use the radiant barrier instead of
insulation then
the sheathing under that for looks.

Tony

"Tony" wrote in message
...
HeyBub wrote:
Tony wrote:
I have a large front porch with a roof about 8 feet up. It is open on
the bottom so you see the sheathing and joists (2x6's). When the sun
is on it the heat really radiates down to the porch area making it
hot as hell even though you are in the shade.

I am considering putting up a "ceiling" but good circulation won't be
easy without a fan. The porch roof extends about 10 feet over the
original roof and shingles of the house so I suppose I could close it
up and add a fan. If I do it I'm thinking of using 3.5" insulation so
there is plenty of room for air circulation between the insulation and
the sheathing.

Any other ideas before I get broiled?

Tony

Forget the insulation.

Radiant barrier. Cheap, 95% effective, easy to install.

What kind of radiant barrier? I don't want it to look like aluminum foil.
Maybe I could use the radiant barrier instead of insulation then the
sheathing under that for looks.

1" Styrofoam, backed with aluminum foil, foil side up, against the
sheathing. Cut it into strips, making a snug fit pressing them between the
rafters. Available in 4 x 8 sheets. The white Styrofoam will look good too.

Foil is useless as condunctive insulation. Touching the hot
roof accomplishes nothing. The styrofoam could help.

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"1D10T" wrote in message
...


1" Styrofoam, backed with aluminum foil, foil side up,
against the
sheathing. Cut it into strips, making a snug fit pressing
them between the
rafters. Available in 4 x 8 sheets. The white Styrofoam will
look good too.

"Stormin Mormon" wrote in message
...
Foil is useless as condunctive insulation. Touching the hot
roof accomplishes nothing. The styrofoam could help.

With the foil-side up it reflects the radiant heat. Perhaps I wasn't clear,
or you're not familiar with the product - the foil adheres to the Styrofoam.
I believe it's often used under vinyl siding.

"1D10T" wrote in message
...


1" Styrofoam, backed with aluminum foil, foil side up,
against the
sheathing. Cut it into strips, making a snug fit pressing
them between the
rafters. Available in 4 x 8 sheets. The white Styrofoam will
look good too.

Stormin Mormon wrote:
Foil is useless as condunctive insulation. Touching the hot
roof accomplishes nothing. The styrofoam could help.

Right. But it's 95% effective against radiant heat. You've got to have an
air-gap and circulation to remove the heat, but it's a cheap and effective
solution.

Tony wrote:

Any other ideas before I get broiled?

Tony

Forget the insulation.

Radiant barrier. Cheap, 95% effective, easy to install.

What kind of radiant barrier? I don't want it to look like aluminum
foil. Maybe I could use the radiant barrier instead of insulation
then the sheathing under that for looks.


You could do that. You could cover the radiant barrier with almost
anything - even paint.

You should probably also plan on some way for the hot air to escape...

wrote:
On Sun, 26 Jul 2009 06:15:20 -0500, "HeyBub"
wrote:

Tony wrote:
Any other ideas before I get broiled?

Tony
Forget the insulation.

Radiant barrier. Cheap, 95% effective, easy to install.
What kind of radiant barrier? I don't want it to look like aluminum
foil. Maybe I could use the radiant barrier instead of insulation
then the sheathing under that for looks.

You could do that. You could cover the radiant barrier with almost
anything - even paint.

You should probably also plan on some way for the hot air to escape...



Why not just put in a fan? Blow that hot air out of there.


A fan doesn't stop *radiant* heat.


... and paint the roof white

I have been tempted! That part of the roof can not be seen from ground
level anyway.

On Jul 26, 11:53 am, Tony wrote:
A fan doesn't stop *radiant* heat.

Not directly, but by conducting heat away from the sheathing, wouldn't
a properly placed fan lower the temperature of the sheathing thus
reducing the amount of heat it radiates?

Tony wrote:

... and paint the roof white

I have been tempted! That part of the roof can not be seen from
ground level anyway.

If you can't see it, that's a good trick. It's often done on commercial
buildings with flat roofs.

The reason you don't want to do it if the roof's visible is that turns an
icky color and stains from the junk in the air.

Staple up a mylar foil space blanket? To the bottoms of the
rafters?

--
Christopher A. Young
Learn more about Jesus
www.lds.org
..


"HeyBub" wrote in message
m...

Forget the insulation.

Radiant barrier. Cheap, 95% effective, easy to install.

On Jul 25, 3:47*pm, Tony wrote:
I have a large front porch with a roof about 8 feet up. *It is open on
the bottom so you see the sheathing and joists (2x6's). *When the sun is
on it the heat really radiates down to the porch area making it hot as
hell even though you are in the shade.

I am considering putting up a "ceiling" but good circulation won't be
easy without a fan. *The porch roof extends about 10 feet over the
original roof and shingles of the house so I suppose I could close it up
and add a fan. *If I do it I'm thinking of using 3.5" insulation so
there is plenty of room for air circulation between the insulation and
the sheathing.

Any other ideas before I get broiled?

Tony

Obama says white paint everything