Do the following preclude cavity wall insulation?
http://i55.tinypic.com/s26usy.jpg
http://i52.tinypic.com/t99i01.jpg
http://i55.tinypic.com/rw5tty.jpg
http://i54.tinypic.com/2yosdch.jpg
http://i51.tinypic.com/ehhvn7.jpg
Photos are taken looking UP the cavity, via a mirror held at an angle in the cavity through a hole, illuminated via a torch shining onto the mirror.
1) Wall ties with large columns of mortar on them.
2) Brick return under window cill extending out along wall about 1ft each side past the window reveal.
3) Another brick return about 8-9-11 courses up from DPC - no logical reason for it (it does occlude the cavity, difficult to see I know, sorry).
4) Cavity is nominal 50mm (ie, 45-50-55-60mm) which is ok.
Construction is 1949 (still material shortages post war).
Frogs are open, mortar is Black Mortar where coal dust used to replace 1 part of sand, very friable weak stuff in places like an aerated sponge. Wall faces SW, prevailing wind down SW junction which means it gets the rain.
Wall has 2 DPC, #1 real one at floor level, #2 higher up.
Cavity has debris extending from raft (3 bricks below floor DPC) to above the floor DPC by about 1 brick along the entire wall. Quarry tile has some white blooming on the inside after heavy rain. The bricks below floor DPC are "dark wet red in a band" after rain, concrete in front of the wall is 1 brick above raft (2 bricks below floor DPC) and is benched with steep fall away from the wall. So it is likely to be water from inside the cavity rather than outside. That below floor DPC row of bricks stay dark for some time after rain has passed whilst everything around is clearly bone dry.
Had the wall open to move and redo a dryer duct (stitch drill mess a few decades ago replaced by proper core drill, 2 piece taped together leaking duct replaced by 1 piece, scraped the cavity out a bit).
http://i55.tinypic.com/s26usy.jpg
http://i52.tinypic.com/t99i01.jpg
http://i55.tinypic.com/rw5tty.jpg
http://i54.tinypic.com/2yosdch.jpg
http://i51.tinypic.com/ehhvn7.jpg
Photos are taken looking UP the cavity, via a mirror held at an angle in the cavity through a hole, illuminated via a torch shining onto the mirror.
1) Wall ties with large columns of mortar on them.
2) Brick return under window cill extending out along wall about 1ft each side past the window reveal.
3) Another brick return about 8-9-11 courses up from DPC - no logical reason for it (it does occlude the cavity, difficult to see I know, sorry).
4) Cavity is nominal 50mm (ie, 45-50-55-60mm) which is ok.
Construction is 1949 (still material shortages post war).
Frogs are open, mortar is Black Mortar where coal dust used to replace 1 part of sand, very friable weak stuff in places like an aerated sponge. Wall faces SW, prevailing wind down SW junction which means it gets the rain.
Wall has 2 DPC, #1 real one at floor level, #2 higher up.
Cavity has debris extending from raft (3 bricks below floor DPC) to above the floor DPC by about 1 brick along the entire wall. Quarry tile has some white blooming on the inside after heavy rain. The bricks below floor DPC are "dark wet red in a band" after rain, concrete in front of the wall is 1 brick above raft (2 bricks below floor DPC) and is benched with steep fall away from the wall. So it is likely to be water from inside the cavity rather than outside. That below floor DPC row of bricks stay dark for some time after rain has passed whilst everything around is clearly bone dry.
Had the wall open to move and redo a dryer duct (stitch drill mess a few decades ago replaced by proper core drill, 2 piece taped together leaking duct replaced by 1 piece, scraped the cavity out a bit).
