Moggaman

Hi . I have 150mm of insulation to go on my sub floor before screed. I hear some people say that it is best to cross the insulation as in lay 50mm one way and 100mm the other way..staggering the joints. I presume that this is best because the first lay of 50mm can be laid adjacent to first fix plumbing pipes and then the 100mm laid over at a different angle.. thing is.. I have some rooms with no first fix water pipes in them, so I could just lay the 150mm boards in one hit in these sections. Is there any issue with this? thanks

Thanks, I am wet plastering the walls..but I am wondering for the need for tape at the wall floor junction? yes, 25mm PIR around the edge of the screed

Hi guys. advice re Airtightness please. I am doing self build . I am at concrete sub floor level. On that I will be putting 150mm insulation and then a screed. Walls are not plastered yet. Currently the first fix electric is ongoing . I am wondering about the need for wall floor Airtightness. It’s a block house. If I get the ceiling slabbed out and the walls And ceiling plastered first all the way down to sub floor, then lay insulation and pour screed…will that take care of Airtightness? alternativrly , if I put in insulation and floor first ( like the Plasterer’s want), what Airtightness steps should I take .. bottom block will be unplastered.. thanks

Yes concrete blocks

Hi. What is the best way to fix a 8inch square timber to a block wall. I need something that will go through the timber squeezing it to the wall. my gate is hanging on the timber but the timber is now a bit rotten at the base .. thinking I could bolt it to the wall..??!

Thanks all.. the geberit frame with sigma cistern is way more expensive than the geberit with omega or delta...why is that?

Hi. I will be putting in 2 wall hung Toilets in the new build. I am looking at geberit wall frames. There seems to be different ones.. I have no constraints at the location on terms of heights etc.. Can u let me know which one I should go for

Where does aluminium tape go?

Rigid I think.. only needs to go about 1.5m

Hi. On my new build it looks like we will put in a sun tunnel to bring some extra light to the upstairs hall. I realise the outside of the tunnel will be insulated but how do I deal with Airtightness? thanks.

Hi. How does a plasterer sand cement render the beam section here please? thanks

Hi. quick question. Window boards … do they go in after plastering ?… block house ?

Apologies my rafters are 175mm (7 x 2)

Hi I have alot of pitched roof insulation to put in as I have a room in roof design. I have 135mm rafters. The detail i have been given is 180mm knauf omni fit roll with insulated plasterboard fronting the rafters. Clearly that cannot work. I propose to use a 110mm PIR board (kingspan or similar) leaving a 25mm airgap behind and insulated plasterboard fronting the rafter also. I will have insulation detailed above the flat part of the ceiling also which will be rolls. Do you think my rafter plan is ok? .Shouldnt affect U value too much? Thanks

Sorry! One up now

Hi all see photo of roof going on in my house. U will see I have an overhang on my roof. On my drawings it shows a column at the outside to support the rafters and roof. It’s not structural , just there to prevent sag on the rafters. Column would need to be about 3.7m long. Have you any suggestions on what I would do?.. A galvanised steel Column classed or perhaps a steel circular column? thanks

Thanks all. Got them up using a JCB telehandler and some slings but it was precarious!.

An alternative quoted was Fakkro N35 135g… is that stronger?

Hi all Starting to roof my house. Builders brought out Corotop blue roofing membrane 140g/m2. see photo. Is it decent stuff anyone know.. what specs should I be looking for. My rafters will be insulated with a 50mm gap to the felt. thanks

Hi, I have 2 No. 12m long 203 x 102 x 23 to lift onto my blockwork upstairs from gable to gable supported on intermediate walls. They are not shown in the drg attached but site just above the collar ties at the collar tie /rafter junction. The beams individually weigh 250kg which is not big. There is a guy near me who i can hire a JCB telescopic handler off. He will drive it. The forks of the handler are probably only 1.5m or 2m apart. Is it maddness trying to balance a12m long beam (it would be strapped to the forks) and lifting up to 6m in height. if it unbalances its gone... Also, it may not have the reach... do ye know how far these things reach? Cranes arent handy got where i am... Just interested in yer view. Thanks

Im off electric!, You are suggesting no heating upstairs?..my missus might have something to say about it.. i am trying to make it as airtight as possible, have mvhr also. Perhaps i will never turn it on but id prefer to be looking at it than looking for it!

Is fire safety the only reasoning?. For those of you that didn’t close the cavity at wallplate level, do u increase wall ties at wallplate level

Hi. Please see detail provided to me regarding area around eaves. My design does not have a cavity closer. The insulation will run up to meet the rafter insulation. Just wondering if the cavity closer has any structural properties or is it just there to ensure nothing gets down into cavity. If so, would a few more wall ties on the last course be warranted?. My question is not around whether is complies but around the reasoning for having one… thanks .

Thanks for this.. you may be right about increase the screed… in terms of why I am putting in the insulation….well…. I think it’s to 1.help the slab respond better to heating up 2. Not to lose heat downwards 3. Not to take heat from downstairs?… but maybe it’s overkill???