ASHP & triple glazing

[Joeboy]

An odd thought today. Miserable rainy day here then thought of Fintray and smiled. His ashp doesn't care that there's no sun and it's wet. It just gets it done anyway and multiplies away.

And you don't have to be thinking about getting wood in either
It might not care if it's sunny or wet but it does prefer the temperature to be higher, night of 14th October 9pm till 9am average temp -2C cop 3.44, last night same time span but average temp 11.2 cop 5.66. When the temp is around freezing and the air is moist it needs to defrost about every hour or so.

Very much a babe in the wood here, but I'm dumbstruck by a 3.44 cop @ -2. I'll be honest, we've done a bit of clearing of lofts and made sure we've got spare tiles for gas flue removal (Octopus are dragging heels on gas mains disconnect or maybe my hopes in that regard are overly buoyant). All that being said, we hand the guys a wodge of cash and straight up start stripping heat from the atmosphere. That is surely surreal? Cash for magic?

It was fun today negotiating with the Vestel supplier for next weeks A2AHP install in Turkey. Very much fun watching Google translate sort my words into Turkish and we negotiated a discount too!



The glazing has kind of slowed down and I'm letting them run at their own speed at the moment. This is due to my pursuit of the best Uw I could find and the fitters working with me as we go to maximise thermal efficiency in a retrofit. That's where I'd like to finish.

There are a couple of milestones for them (the glazing Co) to line up in our time in Turkey or we'll quickly get to the other way of being which rapidly ends in those words being spoken. Hopefully not but I do see paths previously observed in life unfolding and i dont mess about at those times..

[Joeboy]

Had the home power off for the led floodlight install. Goodwe hybrid inverter wouldn't kick in on WiFi when i powered up.again.

Had this problem a year ago, messed about for yonks with goodwe and it eventually sorted itself for a year. In the interim a WiFi dongle showed up in the post unasked for. It lived in the desk drawer for that year.

Fitted it yesterday and it instantly found our home hub and started working. Well done goodwe for out of warranty remote diagnostics, support and part supply at no cost to me.

Sharing this for anyone looking at hybrid inverters.

[Joeboy]

Looks like I'll be seeing a cut thru sample of a 90mm frame that steps down and fits into a 70mm existing window space tomorrow. Apparently it has the same Uw as a full 90mm 3g glazing system.

Fingers x'd for both the sample showing up and the Uw value. .

[Joeboy]

These frames (doorframe shown)
https://www.liniar.co.uk/news/zero90-an ... rom-liniar



I've contacted Liniair directly to see if there is a difference in U value between the two frames, full 90 and rebated. I'd be surprised if there isn't.

Non rebated window frame.



One more recommendation for the shuttered fan.and wiring sealing in the bathroom while i'm here. A tangible difference in heat retention. Great that the humidistat automatically clears the room after shower if it's raining and we can't open the electric velux.

[Joeboy]

Glazing firm came through with a sample albeit a rebate version. We'll be having the full 90 in the build. First time we've seen the reality of the bigger frame in the home to compare to our 2g system. We likes it!

Final glazing size survey and templates for the triangular windows will be on the week we get back from Turkey. I could see that the penny had dropped with them and doing my house with 3g gives them an opportunity to expand their services/portfolio. I like the idea of that. They redeemed themselves, can't be bothered with excuse merchants.











A few slightly shonky performance videos. the sustainability video (No3) shows the fixed glazing unit frame (no openers).

[Joeboy]

Question for anyone who has fitted windows and addressed the thermal break/airtightness question.

I had been going to have the windows fitted with low expansion foam on the outside and use a airtightness tape on the inside.

I then realised that the pre folded air tapes are a standard 12/40 mm. 40mm side to go onto timber frame and the 12mm to go onto the window and then be covered by the 12.5mm plasterboard.

Great but it won't work for us as we are cutting back X amount of the plasterboard to accommodate the 90mm frame depth and finishing with a low profile 40mm edge trim as per the photo. If the edge trim is 5mm in height then there would be 7.5mm of the airseal tape showing on the window frame. Not a look we are aiming for!

Has anyone here used trufit tape?


I though it an effective solution to remove any doubt of low expanding foam doing its external job? As the tape is 66mm wide we could then finish the inside 24mm with a high quality low expansion foam and we'd have the 40mm edge finish with its 5mm height to play with on foam coverage?

https://glazpart.com/wp-content/uploads ... sertS1.pdf

Any input or alternatives appreciated.

Photo below is of an existing window in the house and the sort of finishing trim that will be used. We could burst out the full reveal, fit airtighness tape and refit metal corners and plaster but that's big upheaval in every room in an already finished home. I'm willing to compromise with an alternative?

[Countrypaul]

Question for anyone who has fitted windows and addressed the thermal break/airtightness question.

I had been going to have the windows fitted with low expansion foam on the outside and use a airtightness tape on the inside.

I then realised that the pre folded air tapes are a standard 12/40 mm. 40mm side to go onto timber frame and the 12mm to go onto the window and then be covered by the 12.5mm plasterboard.

Great but it won't work for us as we are cutting back X amount of the plasterboard to accommodate the 90mm frame depth and finishing with a low profile 40mm edge trim as per the photo. If the edge trim is 5mm in height then there would be 7.5mm of the airseal tape showing on the window frame. Not a look we are aiming for!

Any input or alternatives appreciated.

Not sure I fully understand your approach, but if you are cutting back the plasterboard to allow the extra 20mm of window frame depth surely that plasterboard would overlap the new windowframe just as it does(?) the existing. If so surely the 12mm of tape would be hidden by the PB. If not and your 40 mm edge is right o the edge of your window frame then te window frame fits inside your PB - that certainly does not sond right. Maybe a diagram would help clarify things ?

[Joeboy]

Question for anyone who has fitted windows and addressed the thermal break/airtightness question.

I had been going to have the windows fitted with low expansion foam on the outside and use a airtightness tape on the inside.

I then realised that the pre folded air tapes are a standard 12/40 mm. 40mm side to go onto timber frame and the 12mm to go onto the window and then be covered by the 12.5mm plasterboard.

Great but it won't work for us as we are cutting back X amount of the plasterboard to accommodate the 90mm frame depth and finishing with a low profile 40mm edge trim as per the photo. If the edge trim is 5mm in height then there would be 7.5mm of the airseal tape showing on the window frame. Not a look we are aiming for!

Any input or alternatives appreciated.

Not sure I fully understand your approach, but if you are cutting back the plasterboard to allow the extra 20mm of window frame depth surely that plasterboard would overlap the new windowframe just as it does(?) the existing. If so surely the 12mm of tape would be hidden by the PB. If not and your 40 mm edge is right o the edge of your window frame then te window frame fits inside your PB - that certainly does not sond right. Maybe a diagram would help clarify things ?

The cutting back is to allow for the full depth of the 90mm frame to fit and align with the exterior face of the property, I wouldn't want to be cutting back a further 40mm of plasterboard beyond that to apply internal airtight tape to the timber frame and then plasterboard over that strip.

[Countrypaul]

Question for anyone who has fitted windows and addressed the thermal break/airtightness question.

I had been going to have the windows fitted with low expansion foam on the outside and use a airtightness tape on the inside.

I then realised that the pre folded air tapes are a standard 12/40 mm. 40mm side to go onto timber frame and the 12mm to go onto the window and then be covered by the 12.5mm plasterboard.

Great but it won't work for us as we are cutting back X amount of the plasterboard to accommodate the 90mm frame depth and finishing with a low profile 40mm edge trim as per the photo. If the edge trim is 5mm in height then there would be 7.5mm of the airseal tape showing on the window frame. Not a look we are aiming for!

Any input or alternatives appreciated.

Not sure I fully understand your approach, but if you are cutting back the plasterboard to allow the extra 20mm of window frame depth surely that plasterboard would overlap the new windowframe just as it does(?) the existing. If so surely the 12mm of tape would be hidden by the PB. If not and your 40 mm edge is right o the edge of your window frame then te window frame fits inside your PB - that certainly does not sond right. Maybe a diagram would help clarify things ?

The cutting back is to allow for the full depth of the 90mm frame to fit and align with the exterior face of the property, I wouldn't want to be cutting back a further 40mm of plasterboard beyond that to apply internal airtight tape to the timber frame and then plasterboard over that strip.

Thanks, I can see what you mean, I thought the problem was with the 7.5mm of tape showing, but now realise that is a consequence if you put the tape on the PB. I take it that removing the whole PB from the reveal nd refitting/pastering/decorating is not feasible from your point of view. Would it be a possibility to remove the trim and PB in the reveal then piut the tape on re plasterboard etc the next time you decorate. It does seem a pity to spend a lot of time, money and effort on the best windows but risk almost compromising the efficiency by taking a short cut on the final detail.

[Joeboy]

Not sure I fully understand your approach, but if you are cutting back the plasterboard to allow the extra 20mm of window frame depth surely that plasterboard would overlap the new windowframe just as it does(?) the existing. If so surely the 12mm of tape would be hidden by the PB. If not and your 40 mm edge is right o the edge of your window frame then te window frame fits inside your PB - that certainly does not sond right. Maybe a diagram would help clarify things ?

The cutting back is to allow for the full depth of the 90mm frame to fit and align with the exterior face of the property, I wouldn't want to be cutting back a further 40mm of plasterboard beyond that to apply internal airtight tape to the timber frame and then plasterboard over that strip.

Thanks, I can see what you mean, I thought the problem was with the 7.5mm of tape showing, but now realise that is a consequence if you put the tape on the PB. I take it that removing the whole PB from the reveal nd refitting/pastering/decorating is not feasible from your point of view. Would it be a possibility to remove the trim and PB in the reveal then piut the tape on re plasterboard etc the next time you decorate. It does seem a pity to spend a lot of time, money and effort on the best windows but risk almost compromising the efficiency by taking a short cut on the final detail.

I have been thinking and looking at this for a few weeks. There are multiple approaches to finishing these units. I've seen at least three differing approaches. When we get back from Turkey I'll chat with the surveyor and fitter as they are both coming to the house. At the moment i'd say the trufit tape serves the purpose with the low expansion foam as back up. I've seen at least one approach where they air tape externally and then fill with low xp foam from the inside.

My current thought is that the trufit tape is serving as an airtight barrier and acting as a thermal break too? We won't be compromising, instead we'll find the best solution to the particular project with an eye on the boss to keep her happy. Ripping the pb off 14 window reveals is unlikely to do that.

Had a measure and the current frames are 70mm deep. There may be a solution yet depending on what the fitters say somewhere in amongst a narrower tape and pb simulation under the finishing strip. Although i prefer the neatness of the 1st option. If i could find an effective supersticky 10mm airtight tape i'd be laughing.

Its good to talk this through, helps it to coalesce in the mind.