On 16/06/2014 21:45, Phil L wrote:


I fear it's loft insulation that causes most of this, heat rises upstairs
through the day and can't escape as the loft insulation is now up to a foot
thick in most cases, CWI, thermalite blocks and dry lining prevent most of
the heat getting through the walls


Just suggested that to wife ... her answer was 'not a chance' too many
gnats would come in ... Plus kids have hayfever .. one of reasons for
Whole House ventilation system with electrostatic filtration.

As temporary solution opened loft door and have desk fan blowing into it
.... certainly felt immediate improvement ... so tends to confirm
principle of whole house fan quickly cools upstairs.

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UK SelfBuild: http://uk.groups.yahoo.com/group/UK_Selfbuild/