"IMM" wrote in message
...

"Andy Hall" wrote in message
...

It does!!!!!!!!!! The upstairs then is much more well insulated,
warmer
and
consumes less fuel to heat. The upstairs rooms benefit greatly by
heavy
insulation in the loft.

Do I need to do the sums again for
you to demonstrate the point?

Well do them by having a before and after of the ground floor and the
1st
floor.

Here's my house as an exercise:-

Foot print ~ 70m2
Downstairs wall height ~ 2.1m
Upstairs wall height ~ 2.2m
Wall construction:-
downstairs 27 m solid wall construction U-val ~ 2.0
+ 8 m timber clad cavity wall construction U-val ~ 0.6
upstairs 27 m tile hung lath/plaster construction U-val ~ 2.0
+ 8 m timber clad cavity wall construction U-val ~ 0.6
Ground floor :- thick concrete + screed + covering U-val ~ 0.3
Ceiling Floorbaord/Joist/Plaster U-val ~ 1.6
Loft currently insulated with ~ 100mm mineral wool U-val ~ 0.5

Windows:-
Downstairs
2.2 m2 single glazed timber frames U-val ~ 4.8
5.9 m2 sealed double glazed units in plastic and metal U-val ~ 3.8
Upstairs
2.2 m2 single glazed timber frames U-val ~ 4.8
5.9 m2 sealed double glazed units in plastic and metal U-val ~ 3.8

Doors:-
6 m2 mixed construction U-val ~ 3.0

Air changes :- 1.5 per hour

Design parameters
=================
Outside temp -3 C

Downstairs temp 21 C (delta-T = 24)
Upstairs temp 18 C (delta-T = 21)

Heat loss - downstairs
======================
Floor = 70 x 0.3 x 24 = 504 W
Walls = (27*2.1 - 5.9 - 3) * 2.0 * 24 ~ 2295 W
+( 8*2.1 - 2.2 - 3) * 0.6 * 24 = 167 W
Walls Total = 2462 W

Windows = 2.2 * 4.8 * 24 = 254 W
+5.9 * 3.8 * 24 = 538 W
Windows Total = 792 W

Doors = 6 * 3 * 24 = 432 W
Ceiling = 70 * 1.6 * 3 = 336 W
Air changes = 70 * 2.1 * 0.36 * 1.5 * 24 = 1896 W

Downstairs losses = 6422 W

Heat loss - upstairs
====================
Floor = 70 x 1.6 x -3 = 336 W
Walls = (27*2.2 - 5.9) * 2.0 * 21 ~ 2247 W
+( 8*2.2 - 2.2) * 0.6 * 21 = 194 W
Walls Total = 2441 W

Windows = 2.2 * 4.8 * 21 = 222 W
+5.9 * 3.8 * 21 = 471 W
Windows Total = 693 W

Ceiling = 70 * 0.5 * 21 = 735 W
Air changes = 70 * 2.2 * 0.36 * 1.5 * 21 = 1746 W

Upstairs losses = 5951 W

Total losses for house = 12.3kW

Downstairs losses are 51.9% of total losses from house.

Losses through:-

Ground floor 4%
Downstairs solid wall 19%
Downstairs cavity wall 1%
Downstairs windows 6%
Ceiling to upstairs 3%

Roof 6%
Upstairs solid wall 18%
Upstairs cavity wall 2%
Upstairs windows 6%


Then see how much fuel is saved in each. I bet the 1st floor saves
more fuel. Then there is superior cooling of the 1st floor and higher
comfort conditions.