Loose lay insulation under a flat roof?
 

Hi,

I need to get some insulation into the void under a flat roof.

The roof is 12x12ft and I can get access between the joists from one end.

I'm hopping that I can push loose-fill insulation in from the
end using a home made tool of some sort.

Can anyone tell me if the approach stands reasonable chance of working or
is the loose-fill likely to clog up before I manage to push it to the far
end of the roof?

Also which insulation product is the most pushable?

Thanks, Steve.

Loose lay insulation under a flat roof?
 

On 9 Jan, 15:27, "Steve Jones" wrote:
Hi,

I need to get some insulation into the void under a flat roof.

The roof is 12x12ft and I can get access between the joists from one end.

I'm hopping that I can push loose-fill insulation in from the
end using a home made tool of some sort.

Can anyone tell me if the approach stands reasonable chance of working or
is the loose-fill likely to clog up before I manage to push it to the far
end of the roof?

Also which insulation product is the most pushable?

Thanks, Steve.

Whatever you put in, if it is a soft sheet material, you need to
"pull" it in rather than push it (e.g. rockwool etc). Fix a stick to
the end of the material going in first, and use the stick to place it.
You may need to use flexible rods I guess.
You could put in some poly beads, and just push them in bit by bit.
ensuring they do not clog.
But make sure you are maintaining any required ventilation and vapour
barriers etc.
Simon.

Loose lay insulation under a flat roof?
 

On Jan 9, 3:47*pm, sm_jamieson wrote:
On 9 Jan, 15:27, "Steve Jones" wrote:

Whatever you put in, if it is a soft sheet material, you need to
"pull" it in rather than push it (e.g. rockwool etc). Fix a stick to
the end of the material going in first, and use the stick to place it.
You may need to use flexible rods I guess.
You could put in some poly beads, and just push them in bit by bit.
ensuring they do not clog.
But make sure you are maintaining any required ventilation and vapour
barriers etc.
Simon.- Hide quoted text -

I agree about the pulling. You used to be able to get lengths of rock-
wool type insulation in red plastic covers - I'm sure you still can
(B&Q?) - which would obviate the problem of disintegration.

Regards
Richard

Loose lay insulation under a flat roof?
 

On Wed, 09 Jan 2008 08:03:47 -0800, geraldthehamster wrote:

On Jan 9, 3:47Â*pm, sm_jamieson wrote:
On 9 Jan, 15:27, "Steve Jones" wrote:

Whatever you put in, if it is a soft sheet material, you need to
"pull" it in rather than push it (e.g. rockwool etc). Fix a stick to
the end of the material going in first, and use the stick to place it.
You may need to use flexible rods I guess.
You could put in some poly beads, and just push them in bit by bit.
ensuring they do not clog.
But make sure you are maintaining any required ventilation and vapour
barriers etc.
Simon.- Hide quoted text -

I agree about the pulling. You used to be able to get lengths of rock-
wool type insulation in red plastic covers - I'm sure you still can
(B&Q?) - which would obviate the problem of disintegration.

Regards
Richard

Thanks for the replies.

Do you know of any bead or loose fibre products that I could
be pushed in?

Steve.





--
Steve

Loose lay insulation under a flat roof?
 

On 9 Jan, 17:04, "Steve Jones" wrote:

Do you know of any bead or loose fibre products that I could
be pushed in?

Isn't cavity wall insulation blown in, when being retrofitted?

Regards
Richard

Loose lay insulation under a flat roof?
 

Steve Jones wrote:
Hi,

I need to get some insulation into the void under a flat roof.

The roof is 12x12ft and I can get access between the joists from one
end.

I'm hopping that I can push loose-fill insulation in from the
end using a home made tool of some sort.


You can, using a sweeping brush, but you won't get it 12 feet, maybe if you
took a section of ceiling down at the opposite side you might have a chance.

Can anyone tell me if the approach stands reasonable chance of
working or is the loose-fill likely to clog up before I manage to
push it to the far end of the roof?

Also which insulation product is the most pushable?

fibreglass.
Rockwool is heavier but it's also more brittle because the strands are
shorter and thicker than glass.
polystyrene is a fire hazzard.
Celotex type stuff is possible if you cut it into squares the width of the
joists and push each one along until each run is filled but this is
expensive