Jeremy22

Just coming back to this to ask for further advice! Based on my plan above, all the waste pipes are coming from internal sources (obviously) to external branches. The trouble is, that means I need to drill a number of holes through the glulam that the whole of the upstairs sits on (it's essentially a ring beam around the house. A better solution might be to take the waste pipes under the floor internally and then bring outside to join the soil stack. Any ideas of the best way to do this? Can I simply have a branch turning 90 degrees, coming out through the wall and going into a fitting on the stack? And I have two opposing branches that both need to come into the stack. Any help, as always, appreciated.

The slates laying has begun, without a verge trim. There are small gaps under the slates, should I be worried? Should they be filled with sealant? What about wasps getting in and making nests?

Thank you both @tonyshouse and @nod - you’ve help me decide to leave it!

We’re just about to put slates on the roof of our timber frame. All the gables have ladders on them and once the render board is on, the bargeboards (which will be black uPVC :( ) will be about 220mm out from the face of the building providing a good overhang of roof. The question is, should we use any verge covering or leave the tiles ‘raw’. I’ve seen the black aluminium dry verge product from Kytun and it looks smart but I also like the clean slate only look. Lots of new slate roofs I’ve seen in the last few days seem to have a dry verge with no trim. What do people think? any advice appreciated.

FLOPLAST 110mm Soil Ring Seal 92.5 Degree Double Branch - Grey I'm being stupid - isn't the stack the SVP? Because of the fall in the 110 branch, the middle WC will have to fall slightly to connect to the branch (compared to the right WC)

Floplast do a swept double branch - could I use that and avoid needing additional fittings? I meant the connection out of the back on the WC bowl (the one at 190mm). So I can connect those to the branch without a drop into the branch? And the middle WC I should do that using a Y connection (so it will punch through the wall at an angle)?

Thank you everyone. All the horizontals will be outside (apart from the one in the third bedroom on the right where the shower is away from the wall), is that OK? Grey waste horizontals in 50mm. Do the junctions into this need to be 45 degree or is swept OK? Opposing 110 branches OK if they are swept (or do they need to be 45 degree as well?). @Nickfromwales where the WCs connect to the branch, is that where you say I need the 15 or 30 degree bend into the branch? It was that for the connection of the WC horizontals into the 45 degree branch in the stack? Do the WC connections work straight out of the back of the WCs?

@Nickfromwales what do you think?

Thank you

The majority is outside - falls from basins will be mostly inside before 'popping' out! Can you explain the issue with access points on shower runs? Thank you!

Yes, I’ve spent hours reading the regs documentation! I thought opposing branches were OK if they have the same centre line and are swept? Otherwise why would all the manufacturers offer fittings? Would the flushes cause water in the showers/bath/basins to drop when the stack is vented and they are on separate branches? The branch for the showers etc was going to be 40mm but it can easily be 50mm I was also thinking the right hand basin should go into the stack in its own boss rather than in the top of the 110mm with a clamp on boss as this would be neater.

Hi there We’re just about to add a timber frame first floor extension to our bungalow and I’m mapping out the waste and soil pipes. There are going to be three new bathrooms upstairs, all on one side, specifically to use the existing soil stack that is already there for the downstairs WC. Attached is my first draft of the design, can anyone see anything not right? Thanks in advance Jeremy

Hello there. A new joiner from West London. We’re just about to embark on a first floor extension to our bungalow! Learnt a lot from the forum so happy now to be a full on registered member!