craig

https://www.gap.uk.com They may be able to assist.

Here's a screenshot of a recent survey we carried out. With the below survey the external width was larger than the internal width. Our tolerance is 10mm all around and went with this in width and 5mm top and bottom. We would have done 5mm all around but due to how the window was going to be sitting, fitting compriband and PU foam would have been problematic.

Measure width and height inside and measure width/height external (not the window size) and you can take your measurement from there. Your window size will “generally“ be 5mm to 10mm larger than your internal size.

You want to seal to the building ideally, taping over the top of the building wrap isn't the best way but should not be a major issue if you do.

I buy direct from Illbruck as we have an account with them, Illbruck don't sell direct to the consumer I'm afraid. If you speak to Dortech they can order it for you, failing that, let me know and I can order a roll for you. Only difference is, we don't do free delivery as it's delivered direct from Illbruck as we normally order for each specific job and in quantity.

Iso bloco is a compriband, just a different type. It’s equivalent to Illbruck TP651 https://www.illbruck.com/en_GB/product/tp651-trio/

Just by the pictures, you may not have the relevant gaps for a compriband. I would apply ME501 VV. I only recommend Illbruck, as it's what we use all the time and it does the job, I don't get anything from it. https://www.illbruck.com/en_GB/product/me501-vv-duo-window-membrane-hd/

https://www.illbruck.com/en_GB/products/innovations/i3-system/ Essentially an i3 application (3 layers) in a PH it's a given to be honest, it doesn't matter who supplies the products but it should be installed as standard. PU foam is not water tight it's an insulation layer. ME508 or equivalent is not water tight, it is an airtighness layer. So what weather tightness has been applied on the external aspect of the window frame? That's why compriband is used. It has thermal properties, it has weather tightness properties, it has acoustic properties and we all know the importance of thermal performance in a Passive House.

None what so ever. They have taken the easy option. Compriband does more than just seal a window, it has thermal, acoustic and weather tightness properties.

Apololgies I meant to refer to ME508 membrane and would waste 24m of a 25m roll, TP600 15 28/40 would be 2.7m roll length and about £55 - wasting 1.7m length. Nice of you to offer the left over ME501 to him.

Just a fyi, a tape designed for 7 to 12mm gaps for example would give 900 pascals at 7mm and works for thermal insulation and acoustic insulation. 12mm the same but the pascal drops to 600. Past the 12mm you lose the gaurantee on weather tightness but would expand upto 21mm but ideally not past the tape width. https://www.illbruck.com/en_GB/product/tp600-compriband-600/ technical data sheet, page 3 of PDF.

First picture you appear to be pretty tight to the frame, using the thin nozzle for the PU foam, might be a challenge to fill. I would try and squeeze in a 3 to 7mm expanding compriband and repeat on the right side on the inner and outer section of the frame but you might just be too tight. You won't need anything else, no need for airtighness tape. I would PU foam the bottom and apply an airtightness tape here, you have got a large gap at the bottom. I would suggest compriband but it wouldn't be economical to do so. A single roll would be approx 5 to 8m length and you would waste about 4m of it, costing in excess of £100 for 1 roll.

It is, sent PM. Apologies but only myself working and inundated with quoting and Other work. Way behind but we’re back up in strength next week and back to the office as well.

You should. Your 2.63x2.39 fixed window, will be under 300KG triple glazed. It generally should only start to cause concern at 400KG. I have previously declared myself in introductions but only here to help and offer advice and don't like to see someone stuck or think they are limited in choices. The sizes you have mentioned are not restricted to just Internorm, generally speaking some suppliers will struggle with the sizes due to a number of factors. One of them being engineered timber v's non engineered timber and overall unit weight. Numerous suppliers/manufacturers will be able to meet those sizes easily & the price for the slider should be nowhere near £9k for that size if I'm honest, probably more like £6K/£7K possibly less dependant on system. Tilt and turn at 3m high should also not be an issue but again you need to take in the width/height ratio of the opening section.

It should always be a priority, not having one leaves quotes open to interpretation/imagination of the suppliers at the quoting stage. Your architect hasn't indicated any handling of windows on the elevation drawings for example. That's not that overly large but the width/height ratio would need to be checked, max glass size for laminated pane/toughened pane also accessibility to site and on site. How will they be manouvered? Things like that will determine whether being supplied in one unit or coupled is more feasible. Generally speaking, 3m height is fine (width dependant), they and others will be able to do 4m height (width dependant).

That's the first thing you do, can't defend them tbh.

It really boils down to two things. 1: Architects and clients discussing large items and on first/second floor without discussing how it will be achieved. 2: Clients not willing to pay for the equipment required to do the work safely. It’s the window suppliers responsibility to supply it, it is their responsibility to refuse to install it without having the proper equipment which someone needs to pay for. It’s not difficult to ascertain what is needed from the point of quote. Some won’t add it to be more competitive. HSE rules are clear, what you deem safe to lift (no weight limit) but manual handling should be the last resort and mechanical lifting the chosen method. We’ve just finished installing over 300 windows and doors to an commercial site in Exeter (Care Home) and every single window was installed with a glazing robot. It slows the install down, it slows other trades down and it’s a bloody expensive part of the install (happy days for hire company). CSCS cards are good but it advantagoues to have someone with SSSTS or SMSTS. These are more common for installers on a commercial site. You can have CHAS and constructionline as a supplier (we do) but they ain’t worth the paper they are printed on and that’s being honest. Simply a box ticking exercise. Mistakes in measurements happen, they shouldn’t but they do. Austrian suppliers are known to put issues into normal production queue without special treatment. I’m far from perfect but when you **** up, take ownership.

Drop me a PM and I'll put you in touch with our installer.

Not at all, all part of the process ?

Yes, no direct experience but a main contractor (Kier) insisted on using it on the windows to protect them internally on a site we are installing on. It will protect from dust and grime but will not protect from objects striking the windows. I personally wouldn't have chosen it but using the normal protection on over 400 windows, would have been substantially more expensive.

@Thorfun https://www.roma.eu/ (site is in English). https://www.roma-cadplaner.de/ (thanks @Dan F)

Bottom line, they do not deal with any UK distributor or manufacturer. We only deal with our supplier, even when I have tried contacting Roma directly they have been difficult with myself and advising me to speak to my supplier. Great product and great options available on the web (if you find them) but customer service is shocking. They used to deal in the UK and we are asked now and again to service things for them (such as garage doors), I just return the favour. Please speak to my supplier and we'll see if we can help.

It's not my area of expertise but the issue is the spacers need to be inserted between the glass units, they then need to be sealed with what is known as hotmelt (a buytl sealant) and industry standard. You have movement of the building, you have movement of the window frame and over time that hotmelt seal/bond can fail slightly and cause the misting issue. In addition, things such as cleaning products can lead to the hotmelt failing. Many other things can cause it, but I hope it helps a little.

It would say at this stage, no. Glass suppliers will not give warranties outwith the standard 5 to 10 years - too many variables.

Just a wee quick note @AnonymousBosch, those windows are less than 300mm (circa 295 if memory serves me right) ? Regarding the work, you have 10mm tolerenace either side, plus 14mm of exposed frame. Totalling 24mm either side. What's the objective? I presume it's to finish of the returns with render at some point and make it look nice? They are narrow windows, so why not make it a feature? Pack out the returns by 50mm, then just bring the render into the aluminium cladding of the windows frame and finish it off with a render stop bead? Result, less visible frame externally.