Aerobarrier air tightness product/process

[Great_scot_selfbuild]

These are all the responses I was hoping for. Now I can afford some guttering 😆

[saveasteading]

29 minutes ago, Great_scot_selfbuild said:

can afford some guttering

Quality guttering as on @Captain Scally yesterday?

[torre]

1 hour ago, Nickfromwales said:

TF company shouldn’t be punished if your fenestration is letting the side down!?!

I agree if you fit something below agreed spec or just badly, but if TT co already taken an average velux into account when quoting target, then it's not the fenestration that's caused the shortfall in performance

[Great_scot_selfbuild]

UPDATE: I've already cancelled the AB visit - onwards! Few responses below - thanks for the input.

 

8 hours ago, Andeh said:

Future sellers won't care, friends and family won't care and realistically you'd never notice the difference even if you really really tried on a really windy day.

@Andeh I like this summary - thanks.

 

 

7 hours ago, JohnMo said:

So assuming this is without all the plasterboard etc fitted. Going better than 0.64 is chasing numbers, to say look at me. Further gains aren't worth the cost.

@JohnMo yes, pre-plasterboard. Chasing the number was more just a reflection of my 'completer/finisher and desire to get the figure we aimed for (for myself really). Please to say I agree it isn't worth the cost.

 

6 hours ago, saveasteading said:

Will aerobarrier still be performing in 40 years?

Will dust gradually filling these pinprick do the job for no cost?

Are greater leaks appearing over time due to weather, deterioration of seals and other erosion.

@saveasteading All excellent points - I'd been overlooking the potential for the AB substance to degrade over time.

 

6 hours ago, Nickfromwales said:

I would be advising you to fully mask off the doors / windows / roof lights and only allow the AB product to find every other nook and cranny instead.

@Nickfromwales The AB process involves masking off the windows to avoid it getting anywhere you don't want a residue on, which is also why they very much prefer doing it at the pre-plasterboard / MVHR stage (which we're at). I don't know if they do houses at a later stage, but they certainly prefer not to.

 

6 hours ago, torre said:

Personally I'd be happy enough but if the TF quoted knowing your window spec etc to meet 0.6 and the real figure looks like heading over 0.75 maybe there's a conversation to be had with the TF along the lines that you'd be happy with them chipping in 1K towards your resulting higher bills to save them 2K towards aero barrier, maybe not worth the goodwill cost though

@torre The TF contract only relates to the TF, not the windows/doors etc. When I was searching round for the TF supplier I was pleased with Broadaxe's approach which proactively does the test once the build has windows and doors in, and if they're particularly leaky then they tape an airtight membrane (Intello) over them to isolate them from the test (of the TF). I did discuss with them deducting the split amount off the final bill, but understandably they'd outlay it if it meant that we were totally happy from a customer experience, and it would contribute to a high performance result, but not if it was just to accept the 0.64 (which is quite realistically able to fix the 0.04 by isolating the many windows we have. All-round, I'm very happy with the build result. By way of context, their other builds have been comfortably below 0.6 (in the 0.2-0.3 range, so I was just hoping ours may be there - it's not a very standard shape though).

 

6 hours ago, torre said:

I'd be interested if you do get clarification on the difference. 

I've not had anyone comment on this - no idea if it's actually the case that the calculated volumes differ or not.

 

6 hours ago, Nickfromwales said:

So, “congrats on a good job’”  👍

Thanks

 

4 hours ago, saveasteading said:

Quality guttering as on @Captain Scally yesterday?

Oh my word. Just taken a look at the post - @Captain Scally has done a great job. We are looking at some slightly upmarket gutters, but I think even these are budget compared to the beauties on that bungalow (I'm looking at black aluminium from https://clearambershop.com/collections/aluflow-aluminium-guttering coming in around £1500; ouch... 🫣).