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From memory the rad is oversized on the btu rating using the wall as an uninsulated cavity, that said one if the walls is insulated so I think the btu rating is enough. Not surprisingly I'd rather try and reduce the need for heating by insulation rather than just turning the rad up. If I went...

The loo has a new radiator of the correct btu value but the room looses heat quickly and rather like having a window ajar I can brute force the room to be warm by having the rad on for longer/higher but I'd rather close the window as it were. As you mentioned the single leaf wall is (and will...

I'm thinking that a vertical section (say 60mm) of the blockwork next to the brickwork could be cut out, i could then try and clean as much of the cavity out and stuff a bit of rock wool in and then use something like Marmox thermoblock to fill the 60mm gap. Any thoughts ?

Hi Stuart, maybe a better way of me putting it is that heat from the room is going into the wall and without insulation it's going straight to the brickwork. The single skin brickwork is acting a bit like a heat sink being out in the open.

Hi Woody, You're right, the single skin brickwork that's exposed to the outside is (and will be) colder than the blocks. The problem is that the loo is much colder than any other room, it's not a direction issue as it's south facing, the floor is the same as the rest of the house and the...

Are they aircreate blocks, if so I think 6:1 mix is ok. The rule I've heard is that the mortar needs to ne weaker than the blocks, as aircreate are weak (lots of air!) then the mix needs to be weak. I have heard of 9:1 being used.

Hi, The picture is of the back wall in my garage, the white painted brick on the left is a single leaf exposed to the outside, the block way is a cavity with the loo on the otherwise. The cavity is full of rubble and snot and is about 15 to 20mm at it's widest so is too small to insulate (I've...

Thanks for the reply's,the working pressure when tested as asked is 2.7 bar. In answer to Bengasman my priorities are as listed: 1.Performance 2.Reliabillity/longevity 3. cost to run 4. price to change Thanks Pete

Hi,thanks for you reply.The pressure tester was fitted to the outside tap and the tap turned on,this read 3.5 bar (not sure if this is static ?).The water supply looks to be in black plastic pipe of about 25mm external diameter.As the boiler is so old and G rated i thought this would need to go...

Hello,I need some advise on a heating and hot water system for my house.I would like to improve the water pressure to the showers and have a cheaper to run system.It is 4 bed house with 1 family bathroom,1 en suite and 1 cloakroom.Two adults and two children live there.The water pressure is...