I want to top my loft insulation, and have bought some rolls of insulation
which I will be laying across the joists from one side of roof to the other.
I'm not sure what I need to do at the point where the insulation meets up
with the sloping roof timbers and felt. I think I'm supposed to leave a
small gap so air can circulate ? Is there anything I can attach to the roof
timbers to provide that clearance and for the insulation to butt up against
?

TonyB wrote:
I want to top my loft insulation, and have bought some rolls of
insulation which I will be laying across the joists from one side of
roof to the other. I'm not sure what I need to do at the point where the
insulation meets up with the sloping roof timbers and felt. I think I'm
supposed to leave a small gap so air can circulate ? Is there anything I
can attach to the roof timbers to provide that clearance and for the
insulation to butt up against ?

sure. tack some hardboard

On Mar 6, 12:12*pm, "TonyB" wrote:
I want to top my loft insulation, and have bought some rolls of insulation
which I will be laying across the joists from one side of roof to the other.
I'm not sure what I need to do at the point where the insulation meets up
with the sloping roof timbers and felt. I think I'm supposed to leave a
small gap so air can circulate ? Is there anything I can attach to the roof
timbers to provide that clearance and for the insulation to butt up against
?

Some houses depend on this gap for loft ventilation so it really needs
to be maintained. As above is good or some short bits of two or three
inch pipes poked down the gap. Square down pipe is ideal.
Or put in alternative ventilation, eg gable ends.

Ventialtion prevents condensation and possible rot in the roof
structurs

The Natural Philosopher wrote:
TonyB wrote:
I want to top my loft insulation, and have bought some rolls of
insulation which I will be laying across the joists from one side of
roof to the other. I'm not sure what I need to do at the point where
the insulation meets up with the sloping roof timbers and felt. I
think I'm supposed to leave a small gap so air can circulate ? Is
there anything I can attach to the roof timbers to provide that
clearance and for the insulation to butt up against ?

sure. tack some hardboard


I ended up using hardboard here as the spacing between the rafters was
non-standard (and variable). But if you have a modern loft there are
also plastic trays which may be easier (depending on the state of the
current insulation) and don't involve any tacking - eg

http://www.screwfix.com/prods/22511/...Pack%20of%2020

http://www.manthorpe.co.uk/Building/...nel-Vents.html



--
Robin
PM may be sent to rbw0{at}hotmail{dot}com