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pitched roof insulation harry palmer 12-31-2008
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Posted by harry palmer on December 31, 2008, 5:20 pm
Hi all

we have an old victorian house and we are about to replace the gutters and
insulate the roof. Is there a web site where I can see the different
approaches? Do we have to ventilate from the soffits up to a ridge vent or
is there an alternative? I really don't want to cut a slit in the roof right
now, I would prefer a solution where we could spray something into the gaps
in the rafters and just put up dry wall over it BUT I read somewhere that
you have to have ventilation for moisture. This implies to me that when we
get the gutters replaced and they throw away all the old crappy wood planks
its hanging off, that we hang the gutters from aluminum with air slots in
them. These slots vent air into the gap between the insulation and the roof.
up to the ridge and out the ridge vent. I would prefer to A) not have the
ventilation gap at all b) have the ventilation gap and have it go to a tube
at the top that gets vented out of the sides of the house. Please help me
out




Posted by ransley on December 31, 2008, 8:40 pm
> Hi all
> we have an old victorian house and we are about to replace the gutters an=
d
> insulate the roof. Is there a web site where I can see the different
> approaches? Do we have to ventilate from the soffits up to a ridge vent o=
r
> is there an alternative? I really don't want to cut a slit in the roof ri=
ght
> now, I would prefer a solution where we could spray something into the ga=
ps
> in the rafters and just put up dry wall over it BUT I read somewhere that
> you have to have ventilation for moisture. This implies to me that when w=
e
> get the gutters replaced and they throw away all the old crappy wood plan=
ks
> its hanging off, that we hang the gutters from aluminum with air slots in
> them. These slots vent air into the gap between the insulation and the ro=
of.
> up to the ridge and out the ridge vent. I would prefer to A) not have the
> ventilation gap at all b) have the ventilation gap and have it go to a tu=
be
> at the top that gets vented out of the sides of the house. Please help me
> out

Without air circulating up standard shingle roofing on the S side can
go bad in 5-7 years from excessive heat in summer. Is it a heated
attic, or is it open to air and the floor insulated.

Posted by harry palmer on December 31, 2008, 11:26 pm


>> Hi all
>> we have an old victorian house and we are about to replace the gutters
>> and
>> insulate the roof. Is there a web site where I can see the different
>> approaches? Do we have to ventilate from the soffits up to a ridge vent
>> or
>> is there an alternative? I really don't want to cut a slit in the roof
>> right
>> now, I would prefer a solution where we could spray something into the
>> gaps
>> in the rafters and just put up dry wall over it BUT I read somewhere that
>> you have to have ventilation for moisture. This implies to me that when
>> we
>> get the gutters replaced and they throw away all the old crappy wood
>> planks
>> its hanging off, that we hang the gutters from aluminum with air slots in
>> them. These slots vent air into the gap between the insulation and the
>> roof.
>> up to the ridge and out the ridge vent. I would prefer to A) not have the
>> ventilation gap at all b) have the ventilation gap and have it go to a
>> tube
>> at the top that gets vented out of the sides of the house. Please help me
>> out
> Without air circulating up standard shingle roofing on the S side can
> go bad in 5-7 years from excessive heat in summer. Is it a heated
> attic, or is it open to air and the floor insulated.

the house is north south orientated and the attic will be heated as we are
converting it into living space. The floor will be bare wood with living
accomedation below. We do not intend to insulate the floor as it tops our
bedrooms and we don't see the point.




Posted by Astro on January 1, 2009, 7:21 am
> >> Hi all
> >> we have an old victorian house and we are about to replace the gutters
> >> and
> >> insulate the roof. Is there a web site where I can see the different
> >> approaches? Do we have to ventilate from the soffits up to a ridge ven=
t
> >> or
> >> is there an alternative? I really don't want to cut a slit in the roof
> >> right
> >> now, I would prefer a solution where we could spray something into the
> >> gaps
> >> in the rafters and just put up dry wall over it BUT I read somewhere t=
hat
> >> you have to have ventilation for moisture. This implies to me that whe=
n
> >> we
> >> get the gutters replaced and they throw away all the old crappy wood
> >> planks
> >> its hanging off, that we hang the gutters from aluminum with air slots=
in
> >> them. These slots vent air into the gap between the insulation and the
> >> roof.
> >> up to the ridge and out the ridge vent. I would prefer to A) not have =
the
> >> ventilation gap at all b) have the ventilation gap and have it go to a
> >> tube
> >> at the top that gets vented out of the sides of the house. Please help=
me
> >> out
> > Without air circulating up standard shingle roofing on the S side can
> > go bad in 5-7 years from excessive heat in summer. Is it a heated
> > attic, or is it open to air and the floor insulated.
> the house is north south orientated and the attic will be heated as we ar=
e
> converting it into living space. The floor will be bare wood with living
> accomedation below. We do not intend to insulate the floor as it tops our
> bedrooms and we don't see the point.

Harry, I refer you to the following article:
http://www.buildingscience.com/documents/digests/bsd-149-unvented-roof-asse=
mblies-for-all-climates/2007-07-24.8161419327/download

The Building Science website has a wealth of information, based on
actual research and scientific principles.

-Ted


Posted by harry palmer on January 1, 2009, 7:48 am


>> >> Hi all
>> >> we have an old victorian house and we are about to replace the gutters
>> >> and
>> >> insulate the roof. Is there a web site where I can see the different
>> >> approaches? Do we have to ventilate from the soffits up to a ridge
>> >> vent
>> >> or
>> >> is there an alternative? I really don't want to cut a slit in the roof
>> >> right
>> >> now, I would prefer a solution where we could spray something into the
>> >> gaps
>> >> in the rafters and just put up dry wall over it BUT I read somewhere
>> >> that
>> >> you have to have ventilation for moisture. This implies to me that
>> >> when
>> >> we
>> >> get the gutters replaced and they throw away all the old crappy wood
>> >> planks
>> >> its hanging off, that we hang the gutters from aluminum with air slots
>> >> in
>> >> them. These slots vent air into the gap between the insulation and the
>> >> roof.
>> >> up to the ridge and out the ridge vent. I would prefer to A) not have
>> >> the
>> >> ventilation gap at all b) have the ventilation gap and have it go to a
>> >> tube
>> >> at the top that gets vented out of the sides of the house. Please help
>> >> me
>> >> out
>> > Without air circulating up standard shingle roofing on the S side can
>> > go bad in 5-7 years from excessive heat in summer. Is it a heated
>> > attic, or is it open to air and the floor insulated.
>> the house is north south orientated and the attic will be heated as we
>> are
>> converting it into living space. The floor will be bare wood with living
>> accomedation below. We do not intend to insulate the floor as it tops our
>> bedrooms and we don't see the point.
> Harry, I refer you to the following article:
>
http://www.buildingscience.com/documents/digests/bsd-149-unvented-roof-assemblies-for-all-climates/2007-07-24.8161419327/download
> The Building Science website has a wealth of information, based on
> actual research and scientific principles.
> -Ted

thanks Ted

this seems to be exactly what I need to read and I will also contact them to
see how to approach this. Thanks to all of you who replied and helped me out
have a really great new year
harry


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