Hello All, Please can anyone give me some tips regarding laying the heavy dense concrete blocks as I'm having all kinds of trouble trying to lay them straight. I've tried mixing the mortar stiffer but they keep wobbling about and pushing the mortar out and sinking etc. I have a complete building to ...
Hello again all, I'm now about to lay bricks on a wide 450mm DPC to form a cavity tray but I'm unsure of a few things. The first is how many/where to position the weep holes on the outer leaf. I am going to lay the wide DPC over the top of the gas barrier which covers both inner and outer leaf for t...
Hello again All and thank you for the replies for my DPC/Gas barrier questions. I am now ready to plan how to close the cavity at the sides of a roller shutter door which will have an internal shutter box. Do I leave the cavity open and hope that I can positiob the roller shutter runner in the gap o...
Okay many thanks indeed for this. I also don't understand this or even why it has t be fitted because the property along with all the other properties in the terrace have cellars so if there is any gas below the ground then surely the cellars will be full??? The gas resistance visqueen is also much ...
Hello again, I ow have another problem in that I must install a special blue visqueen methane gas barrier under the floor concrete which must come up the sides of the inner leaf and also continuously lap over to the outer leaf which means I will need a cavity tray all round the building with weep ho...
Hello All, I'm ready to start building my walls up from DPC but where the extension buts up to the existing building I need to know if I need to fit a vertical DPC to the existing wall in between the inner & outer leaf of where my new walls will be built. If I need this vertical DPC I then need ...
Hello again All, Now I have the information I need to fit my door frame my next question is which course up from DPC do I start to lay my cavity wall ties? If I start on the first course up from DPC I will need to lay one course of common bricks on the inner leaf so the wall ties will line up with t...
Okay many thanks for this. So what size door frame do I ask for at my local building merchant? I'm not sure how to specify the door frame, i.e. do I specify the door frame width or the door width.
Okay many thanks for this. So what size door frame do I ask for at my local building merchant? I'm not sure how to specify the door frame, i.e. do I specify the door frame width or the door width.
Hello All, I am now up to DPC level with my extrension but I am having problems setting out the correct brick bond for a door frame. Basically I want to fit a standard sixed door (2"6"") but I can't seemt to find a door frame which will span 3 or 4 strechers to prevent me having to ma...
Many thanks for this reply. It may not be too bad as I've not gone too far up yet but I'm not sure what level the weep holes need to be fitted. Are they to be fitted in the perps at the side of the bricks level with the lean mix cavity concrete or do they go higher up towards DPC level. I was going ...
Hello, I am building a workshop extension and I am almost up to DPC level and ready to fill the cavity with lean mix concrete to ground level but a friend told me that I should have installed a Cavity Tray below the DPC with weep holes to drain any water from the cavity. There is nothing on the plan...
Hello there, Please can you tell me if plastisicer (i.e. Febmix) is allowed below ground level? I am building an extension and I am in the process of bringing the brickwork up to ground level but I have heard that you should not use Febmix or any other plasticiser until above ground but I don't know...
