Cooling tips

[pete01]

There’s a Meme for this. Who posted it recently?

@pete01 I’m sure it was you

Doesn't ring any bells

 

[motorbiking]

It does in terms of thermal mass. there's a tiny risk (1 degree difference) of external heat penetration with internally insulated (solid) walls.

Just to be clear you are saying U is influenced by the order of Sum R?

 

[noseall]

That’s nonsense.

It depends whether the insulation is used in conjunction with a (stagnant) air gap.

Partial fill needs the insulation tight against the internal blockwork (within the cavity) with an air gap between it and the external leaf.

 

[noseall]

Just to be clear you are saying U is influenced by the order of Sum R?

The exception when it comes to insulation is if you have it on the inside of your wall, which can create a "small additional risk" of overheating by one degree Celsius or so, but only if your home isn't well ventilated anyway, explained Prof Lomas

 

[MNW67]

I'm sure between you, by the end of the night, you will have come up with your own formula.

Which part of the building's mass comes within the insulation envelope is an extremely important design factor.

You still haven't explained why all the studies show that external insulation is best for reducing overheating. Maybe you should take your head out of the science textbooks and consider real world data and design practices.

 

[Deleted member 317777]

Doesn't ring any bells

About grammar ?

 

[motorbiking]

I meant the external face, whether that is render or whatever, is usually light coloured.

Solar Reflectiveness. Changes the surface temperature, not the U value.

 

[noseall]

I'm sure between you, by the end of the night, you will have come up with your own formula.

It's much better than you have done with your misunderstanding of your own links.

 

[MNW67]

Solar Reflectiveness. Changes the surface temperature, not the U value.

I know.

 

[Deleted member 317777]

Yep that certainly appears so, I’m genuinely shocked that a builder could have such a poor understanding of the subject.

Reading his posts, he gets told the spec by architects and customers.

And still can’t comprehend how heat loss works.

It’s a shame

 

[pete01]

 

[Deleted member 317777]

Pfft.

The bloke is an illiterate dunce.

View attachment 385242

 

[noseall]

Which part of the building's mass comes within the insulation envelope is an extremely important design factor.

It does with IWE.
The risk is probably from the floor joists etc (thermal bridging). However, it is only small and can be mitigated with modest ventilation.

 

[motorbiking]

Which part of the building's mass comes within the insulation envelope is an extremely important design factor.

You still haven't explained why all the studies show that external insulation is best for reducing overheating. Maybe you should take your head out of the science textbooks and consider real world data and design practices.

The science is sound, the formula are sound and have been used for decades. As has been discussed, the rate of loss gain is a factor of U and the difference in temperature. It is that last part that is impacted by solar gain.

Calculating U values, is not the work of scientists, its every day work for the average HVAC engineer. People who work out how much heating and cooling is needed for a building.

But I'll happily leave you and Nosenout to come up with your own special formula.

 

[noseall]

The science is sound, the formula are sound and have been used for decades. As has been discussed, the rate of loss gain is a factor of U and the difference in temperature. It is that last part that is impacted by solar gain.

Waffle.

Robustly insulated cavity walls don't eventually or inevitably heat up internally during the day to day occurrences on hot summers days. Utter bollax.

As for the rest of your blarney - READ YOU OWN LIKNKS BEFORE POSTING THEM!