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I will try and modify my drawing later and repost to check i have got it right. Thanks for all your help so far.

What do you mean by air behind water?

Thanks for that. I think i now know how to make each connection. Does the vent need to be at the end of the run though or is Teeing off by the bath connection ok. This would leave around 2.5m to the toilet and another 2.5m to the shower.

I have room for a vertial stack to may be installed above ground in what will be the airing cupboard adjacent the shower Should i therefore branch off just before the shower and put an air admittance valve on this? Does this have to be right at the end of the run like this, or could i...

Thanks Do the boss pipes have to be mounted vertically. What i ideally need to do is fit them horizontally underground especially with the bath and shower as i will not have the head room to bring the 110mm above ground. Also, how do i seal the DPM around the pipe where the come through it?

I need to lay a new drain around the back of our extension and then under a new slab in our bathroom (see pic). Couple of questions; 1) does the layout look right. I have put rodding points by the 2 main changes of direction (there is approx 10m between the two). should these be positioned to...

Yeah, a master craftsman may not be particularly happy with my end result but considering i dont do a lot of woodwork, and i dont have all the best tools i am happy. as i said, the gaps are only small and i just want it to be perfect. Have just ordered some car filler off ebay.

Really? Thanks for quick reply

I have built a gate which i am really happy with however to make it perfect i want to fill the small gap around the joints where the horizontal rails meet the vertical end most. I have primed the gate grey ready for its grey topcoat and the gaps are more obvious now than when it was bare wood...

Thanks guys. Looks like I shouldn't worry too much. Should I change to 1:3 for the rest or will producing a strong section of wall and a weak section be a bad idea.

I started laying the first couple of rows of blocks yesterday up to DPC. Overnight, the trench flooded meaning that the first row of blocks and the mortar was underwater. I have pumped it out this morning to carry on but the mortar is very soft, will this be ok? Even the next row of blocks that...

Yes, I am Installing insulation. Yet undecided wether to install it beneath the slab to provide a heat sink for the underfloor heating or above the slab for a quicker response time. Can't make my mind up. Thanks

I am about to lay the hardcore and sand blinding for our extension followed by the DMP before the slab. Questions are 1) should the sheet DPM be laid over the wall DPC or under it? and shoudl it overlap the whole width of the inner wall? 2) internal corners are fine as i can obviously pleat...

I rang up catnic and they told me what lintels i needed. I was just going to buy and extra stong lintel that came in spans for my 4m opening however they advise me that i needed 2 separate lintels for the cavity wall due to the fact i was planning on having top hung bifold doors. Might be worth...

The thickness wont really effect the stength to hold the tiles, its the flexing that is the issue with the tiles potentiall cracking. Usual solution is to double board (total 25mm) or add extra studs which you have already done. I would have thought you would be ok but it wouldnt hurt to add a...

I use an AV company regularly who will put up a 42" TV with the right plasteboard fixings and no wood reinforcement. They take the warranty on that though. I always fix a sheet of ply between the studs behind the plasterboard, this has the added benefit that you can fix anywhere.

I need to lay a new drain from my bathroom under a new concrete slab to the rear of the house where i am installing a new drain. I can not find any details anywhere on how to do this. Plenty on installing new drains outside. I have about 600mm from floor surface to the bottom of the pipe so...

Would you not end up with the remaining external corner being a cold bridge and a route of damp from outside to internal flush wall?

Shoudlnt need to, it is about 6m to the next butressing internal block work partition that comes off it.