my idea :-

http://uk.geocities.com/gentlegreengiant/walldetail.JPG

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"brugnospamsia" wrote in message
k...

"Mike" wrote in message
...

"brugnospamsia" wrote in message
k...
Dear group,

My home improvement programme is in danger of being held up due to
conflicting advice I have received regarding how to attach insulated
plaster
boards to 9 inch solid brick walls built with lime mortar.

Brent borough council insist on battening and hence a generous air gap
over
brickwork with no waterproofing treatment applied directly to the wall
:-


http://www.brent.gov.uk/bccs.nsf/248...944/bda0a799ca
60698c80256c1d0047621d/$FILE/BCCS%20Dry%20lining%20Solid%20Blockwork%20info%
20sheet%20No.7.doc

A video made 10 years ago by a local university shows waterproof
sand/cement
render being applied then the insulating boards attached with adhesive
dabs,
the boards then being skimmed.

The outside of the wall is rendered and I don't appear to have problems
with
penetrating damp


Knowledge on old houses has come on a lot in the last ten years.
Look at www.periodproperty.co.uk for a variety of articles on the
subject.

We had to remove some of this waterproof render applied some twenty years
ago as the wall had gone green. Removing it of course took some of the
lime
mortar with it so this had to be redone as well.

Once dried out, we used an average two inch gap (varies a bit as property
is
random stone), and again no waterproofing applied. Make sure the air gap
is
well ventilated. Upstairs is easy into the eaves but downstairs can be a
real pig. You need to put in airbricks and monitor whether damp is
collecting behind the insulation which of course is somewhat difficult to
do
as you have to leave temporary access panels and plaster these up later.
If
damp does collect you need to add more airbricks or a fan until things
stabilise.




Gawd, it gets worse and worse !

One thing I'm trying to avoid is having to pay for too much skimming so I
was hoping to avoid mechanical fixings.
I wonder if I could attach the boards to the battens with adhesive ?

The main problem I see is the difficulty in sealing on the warm, moist
side where the boards meet the floor.

Where adhesive is recommended it is laid in a grid to form sealed cells.

Perhaps a hybrid system would work with boards attached to the battens
with adhesive and with battens along the floor well sealed to the wall
with mastic ?