JackofAll

Thanks, bit of an update, covered cavities with heavy gauge polythene,called in this eve(not on site today and the wind had knocked some of the stock bricks into various spots inside the cavities. Insulation soaked and crumpled where the bricks fell in. Have noticed that the brown colour is gone and its(insulation) now looking pale yellowy brown like the stuff it's treated with has washed out. BTW don't have weep vents.

So we had 80mm(a month's worth in 36hrs) of rain fall on Friday, never got to cover the cavities and the exposed insulation(knauf dritherm) is VERY wet. Will that ever dry out, some of the exterior walls were saturated.

identified the issue, stock bricks had been dropped in, taken out and insulation not fixed to original place, thanks. Am using 300mm, plenty good.

Have noticed that in some spots the dritherm 37 is settling a little bit as we are building the walls. Is this normal?

In old money, 215x440x100. Was thinking, by building the cavity wider than the insulation and having weep vents would I be introducing air movement into the cavity thus decreasing the performance of the insulation

4 inch

Thanks for replying,I would've thought +-5mm, so do you reckon 305mm would do?

Will be starting the blockwork in a week or so and am wondering for full fill(300mm) how much bigger should the cavity be to allow for deviation in blocks?

Got a quote last November, for supply and fit internorm. Had the quote revised today, same price as back then. Tbh wood and metal prices have come down so was expecting same for the windows, not the case, unless the provider/installer ain't passing it on.

Thanks John.

@JohnMo just looking at another quote that we got. I take it that there will be no need for an 8 zone wiring center if the whole house is on a single zone. So just a wiring module for 1 zone. Or is the hot water cylinder counted as a zone in which case a 2 zone wiring center will be required.

Forgive my stupidity John, if the pipe temp is say 23deg surely the floors in all the house heat up uniformly or is it that the pipes for the farthest rooms lose some of the 23deg temp through conduction?

Thanks John, Never thought about the rooms that have pipes running through eg, utility and hall. The 3 or 4 degree variation in room temp that you mention John, is that due to solar gain? re. cooling will have to check if the unit we have selected has a cooling option.

Apologies, 200mm centres, just confirmed with supplier. Pipes will be in 150mm concrete. Had a mate check out heat pump size based off the BER assessment, he came back with 7.5kw so 8.5 ain't a kick in the arse away. Will have to check out hysterisis meaning. Am not sure why a room wouldn't need ufh?

Never tried wunda, wrong side of the pond, did try BPC, around 2k dearer that the quote above, could be providing better quality gear hence the difference, they asked if I would send on the attached quote which I did, awaiting response.

That's based on 150mm centers, 179m2, 300mm eps in floor 150mm concrete and an 8.5kw ASHP. As far as heat loss goes, take it I add up each components heat loss figures, AFAIK the report doesn't give an overall figure.

It's a bungalow John.

Have only ever seen it done like the picture. Might be something to do with not damaging them when building courses above. If in doubt stand close when they're installing them.

Have received 3 different quotes for same job. First one specs 9 port and 7 port manifold, second 11 and 6 while the third one specs 7 and 7. Am confused tbh, I asked the supplier of the 3rd quote why they are specing a 7 and 7 and was told its plenty good as per the program they use for the size of the house. Anyone shed some light on this please, thanks.

Anyone know what distance out from the wall should the soil pipe be or is it dependent on the type of Jack's fitted?

For those who previously installed, did you use low expansion PU foam along with the staples or just staples when fitting all external pieces?

Thanks, what is the black stuff you closed the cavity with?

@nod what size cavity did you go with?

Is that Dpm covering the cavity in the top right corner?

What is the slip membrane for?