Greetings

I am planning to have my very ageing roof retiled. In the process I am
going to insulate the loft. Currently there are boards on top of the
ceiling joists, with insulation here and there underneath the boards.
The loft is used to store a lot of stuff, access to which is via a
foldaway loft ladder.

I picture putting mineral wool stuff up to the level of the joists,
then rigid boards on top, followed by wooden boards to allow the stored
stuff back in again.

BUT - for the loft ladder to work, the space that it folds onto would
have to remain at its current level, i.e. atop of the joists, so not as
fully insulated as the bulk of the loft space.

Would that be allowed under the buiding regs?

Cheers







isulation, inherited when I bought the house is hit and miss

--

On 10/06/14 21:17, JIP wrote:
Greetings

I am planning to have my very ageing roof retiled.

Then put celotex between the rafters and under them - I did.

If you have 4" rafters, and the tilers use a breathable membrane, you
can typically have 3"/75mm between the rafters leaving a 25mm air gap
under the tiles.

Another 25-50mm under the rafters and you have the equivalent of 8-10"
glass wool. And your floor is clear (you could still have 4" glass wool
on the ceilings between the joists).

On 10/06/2014 21:17, JIP wrote:
Greetings

I am planning to have my very ageing roof retiled. In the process I am
going to insulate the loft. Currently there are boards on top of the
ceiling joists, with insulation here and there underneath the boards.
The loft is used to store a lot of stuff, access to which is via a
foldaway loft ladder.

I picture putting mineral wool stuff up to the level of the joists,
then rigid boards on top, followed by wooden boards to allow the stored
stuff back in again.

BUT - for the loft ladder to work, the space that it folds onto would
have to remain at its current level, i.e. atop of the joists, so not as
fully insulated as the bulk of the loft space.

Would that be allowed under the buiding regs?

Cheers







isulation, inherited when I bought the house is hit and miss

Are the building regs really the issue? I'd have thought it more
important that you get the best advantage from the insulation job. It's
not like anyone is going to pop round to check your insulation to see if
you're up to regs.
Presumably the hatch could have something put on it, like a slab of
celotex, if the ladder doesn't stop that, and that would insulate most
of it.

It's not like anyone is going to pop round to check your insulation
to see if you're up to regs.

Except for the BCO if the OP/OP's roofer is doing it by the book.

--
Robin
reply to address is (meant to be) valid

In article ,
Tim Watts writes:
On 10/06/14 21:17, JIP wrote:
Greetings

I am planning to have my very ageing roof retiled.

Then put celotex between the rafters and under them - I did.

If you have 4" rafters, and the tilers use a breathable membrane, you
can typically have 3"/75mm between the rafters leaving a 25mm air gap
under the tiles.

Another 25-50mm under the rafters and you have the equivalent of 8-10"
glass wool. And your floor is clear (you could still have 4" glass wool
on the ceilings between the joists).

If the roofing battens are being replaced, you could consider doing
a warm roof. If you can raise the roof height by a few inches, you
put celotex between the rafters and new battens. Otherwise, you could
look at something like TLX Gold - insulating replacement for sarking,
to be used with some loft insulation.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On 11 Jun 2014, (Andrew Gabriel) grunted:

In article ,
Tim Watts writes:
On 10/06/14 21:17, JIP wrote:

I am planning to have my very ageing roof retiled.

Then put celotex between the rafters and under them - I did.

If you have 4" rafters, and the tilers use a breathable membrane, you
can typically have 3"/75mm between the rafters leaving a 25mm air gap
under the tiles.

Another 25-50mm under the rafters and you have the equivalent of 8-10"
glass wool. And your floor is clear (you could still have 4" glass wool
on the ceilings between the joists).

If the roofing battens are being replaced, you could consider doing
a warm roof.

Doesn't Tim's suggestion of celotex between the rafters presuppose it's has
to be a warm roof, though? Otherwise the celotext won't work?

--
David

On 11/06/14 08:22, Lobster wrote:
On 11 Jun 2014, (Andrew Gabriel) grunted:

In article ,
Tim Watts writes:
On 10/06/14 21:17, JIP wrote:

I am planning to have my very ageing roof retiled.

Then put celotex between the rafters and under them - I did.

If you have 4" rafters, and the tilers use a breathable membrane, you
can typically have 3"/75mm between the rafters leaving a 25mm air gap
under the tiles.

Another 25-50mm under the rafters and you have the equivalent of 8-10"
glass wool. And your floor is clear (you could still have 4" glass wool
on the ceilings between the joists).

If the roofing battens are being replaced, you could consider doing
a warm roof.

Doesn't Tim's suggestion of celotex between the rafters presuppose it's has
to be a warm roof, though? Otherwise the celotext won't work?


Technically it's still a cold roof as the top of the woodwork is cold.
This is why you have to take care to avoid condensation issues.

A warm roof is where the whole structure apart from the covering (tiles)
is warm.

In article ,
Lobster writes:
On 11 Jun 2014, (Andrew Gabriel) grunted:

In article ,
Tim Watts writes:
On 10/06/14 21:17, JIP wrote:

I am planning to have my very ageing roof retiled.

Then put celotex between the rafters and under them - I did.

If you have 4" rafters, and the tilers use a breathable membrane, you
can typically have 3"/75mm between the rafters leaving a 25mm air gap
under the tiles.

Another 25-50mm under the rafters and you have the equivalent of 8-10"
glass wool. And your floor is clear (you could still have 4" glass wool
on the ceilings between the joists).

If the roofing battens are being replaced, you could consider doing
a warm roof.

Doesn't Tim's suggestion of celotex between the rafters presuppose it's has
to be a warm roof, though? Otherwise the celotext won't work?

"Warm Roof" is a building term which technically means the insulation
is beyond the rafters, i.e. the rafters are warm too in cold weather.
It benefits from not losing headroom below the rafters, and they are
themselves much better protected from damp/condensation/etc.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

On Tue, 10 Jun 2014 22:42:19 +0100, Robin wrote:

It's not like anyone is going to pop round to check your insulation
to see if you're up to regs.

Except for the BCO if the OP/OP's roofer is doing it by the book.

When I asked a couple of roofing firms about replacing my roof, I was told
that the loft insulation was part of the same 'thermal element' (is that the
term?), so the insulation would have to be up to standard.
I've ~30cm of glassfibre over 1/3rd. of the loft and ~7.5cm+bords over the
rest, so I'd have to lose ~20cm of headroom to do the lot.
Fortunately the roof was sound and a few repairs fixed it.
--
Peter.
The gods will stay away
whilst religions hold sway

Huge wrote:
On 2014-06-10, wrote:

The loft is used to store a lot of stuff,

Throw it away. If it's been in the loft for years, you don't need it.


Please stop telling the truth. I like my unusable rubbish collection
which she keeps trying to evict!

Huge put finger to keyboard:

On 2014-06-10, JIP wrote:

The loft is used to store a lot of stuff,

Throw it away. If it's been in the loft for years, you don't need it.

Didn't realise you were female, Huge.

Huge put finger to keyboard:

On 2014-06-11, Scion wrote:
Huge put finger to keyboard:

On 2014-06-10, JIP wrote:

The loft is used to store a lot of stuff,

Throw it away. If it's been in the loft for years, you don't need it.

Didn't realise you were female, Huge.

I'm not.

I know. Should've added a smiley.

But I have recently had to clear the houses of two elderly
relatives, and I'd like to save other people the pain of this. I've been
chucking stuff away ever since the first house clearance and the second
one just reinforced the point.

I keep boxes that things come in, just in case. I'm sure I've got boxes
for things I threw out a decade ago...

On 11/06/14 09:17, PeterC wrote:
On Tue, 10 Jun 2014 22:42:19 +0100, Robin wrote:

It's not like anyone is going to pop round to check your insulation
to see if you're up to regs.

Except for the BCO if the OP/OP's roofer is doing it by the book.

When I asked a couple of roofing firms about replacing my roof, I was told
that the loft insulation was part of the same 'thermal element' (is that the
term?), so the insulation would have to be up to standard.
I've ~30cm of glassfibre over 1/3rd. of the loft and ~7.5cm+bords over the
rest, so I'd have to lose ~20cm of headroom to do the lot.
Fortunately the roof was sound and a few repairs fixed it.


No - few BCOs would try to insist on new build standards on a renovation
job. as long as it is better (or at least as good as) what went before
that's generally fine.

On Wed, 11 Jun 2014 17:44:14 +0100, Tim Watts wrote:

On 11/06/14 09:17, PeterC wrote:
On Tue, 10 Jun 2014 22:42:19 +0100, Robin wrote:

It's not like anyone is going to pop round to check your insulation
to see if you're up to regs.

Except for the BCO if the OP/OP's roofer is doing it by the book.

When I asked a couple of roofing firms about replacing my roof, I was told
that the loft insulation was part of the same 'thermal element' (is that the
term?), so the insulation would have to be up to standard.
I've ~30cm of glassfibre over 1/3rd. of the loft and ~7.5cm+bords over the
rest, so I'd have to lose ~20cm of headroom to do the lot.
Fortunately the roof was sound and a few repairs fixed it.


No - few BCOs would try to insist on new build standards on a renovation
job. as long as it is better (or at least as good as) what went before
that's generally fine.

Thanks - a point I can argue if necessary. If the BCO isn't too worried, the
roofer is probably being cautious - it's not a job that can be out of
sight...
--
Peter.
The gods will stay away
whilst religions hold sway

In article ,
Scion writes:
I keep boxes that things come in, just in case. I'm sure I've got boxes
for things I threw out a decade ago...

That's the *only* thing I allow in the attic.
Otherwise I know it would be filled with things which
will never be used again.

Wish I was so disciplined about the house. However,
I have just taken 3 perfectly working VDUs to the tip,
which will never be used again. (I can buy second-hand
LCD replacements, physically much smaller and lighter
and clearer and with bigger screens for £10.)

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]

"Andrew Gabriel" wrote in message
...
In article ,
Scion writes:
I keep boxes that things come in, just in case. I'm sure I've got boxes
for things I threw out a decade ago...

That's the *only* thing I allow in the attic.
Otherwise I know it would be filled with things which
will never be used again.

Wish I was so disciplined about the house. However,
I have just taken 3 perfectly working VDUs to the tip,
which will never be used again. (I can buy second-hand
LCD replacements, physically much smaller and lighter
and clearer and with bigger screens for £10.)

You think you have problems? I'm still paying "poll tax" on our previous
house which is totally filled with the wifes tat which she doesn't wanna
part with. 6 years and counting.

--
Imbecile, still with 3 **** machines out of the original 6.
Yes, I realise that I'm insane (but not as insane as the parrot man).