Window suppliers need to make a decision

hexosan

I finally have my windows narrowed down to two suppliers lets call them:
company G & company M.

Company G are €1500 cheaper but only offer a 70mm profile window with a u-value of .85 W/m²K

Company M have a 90mm profile window which is passive house certified at 0.7 W/m²K

First question is with only 0.15 W/m²K in the difference will I ever see the €1500 price difference recouped during the lifetime of the build. (House is 250mm pumped bead cavity, full Airtightness package aiming for under 1 air change)

Second question is I have (4) windows which are 900mmx1.5m (actual ope size) company G claim if this is been done in one pane of glass I must go with an inward pivot / tilt window with three handles, one on either side of the window and one at the bottom to guarantee an airtight seal. (Other half isn't a fan of this look) they state window is to large to go with a casement opening out as the weight will break the hinges over time. They said they can make it but won't stand over it.

Company M claim there's no issue whatsoever making a casement window that size opening out. I'm puzzled over the conflicting views on this matter and don't know who to believe.


Can anyone on boards shed light on the above.

Thanks

Hex.

john_eire

Had windows fitted by company G lately and my front windows are a similar size to yours,
its a top hung opening out windows with three handles,

Before they where fitted I thought they would look to busy with three handles
But once they where fitted it looks nice,

Company M told me the same but about opening size but I wasn't going to take a chance because of the story of poor after sales service



Can't help on first question

hexosan

john_eire wrote: »

Had windows fitted by company G lately and my front windows are a similar size to yours,
its a top hung opening out windows with three handles,

Before they where fitted I thought they would look to busy with three handles
But once they where fitted it looks nice,

Company M told me the same but about opening size but I wasn't going to take a chance because of the story of poor after sales service



Can't help on first question

Thanks for taking the time to reply John good to hear from someone with first hand experience.

Calahonda52

1. Thread title misleading. Eats, shoots and leaves.
2. Euro question cant be answered without having the big numbers.
3. As it's a PH with ACH <1.0 will windows ever be open?
4. Tilt only windows very poor on air circulation

hexosan

Calahonda52 wrote: »

1. Thread title misleading. Eats, shoots and leaves.
2. Euro question cant be answered without having the big numbers.
3. As it's a PH with ACH <1.0 will windows ever be open?
4. Tilt only windows very poor on air circulation

1. Feel free to suggest a better one
2. What big numbers ?? Your correct in that the windows probably won't be open or I could put restrictors on company M's windows to stop them opening fully out reducing the pressure on the hinge.
3. House isn't passive it'll go close but won't be certified just using the principles of PH
4. What do you mean poor on circulation ??

Calahonda52

Window suppliers: I need to make a decision.
1,500 as a % of 2,000 is a lot , of 20,000 is not worth a posting.

Evidence from the Father
Land That bottom hinged tilt in Windows dont allow as much air to pass through house as side hung If doing x ventilation.

hexosan

Calahonda52 wrote: »

Window suppliers: I need to make a decision.
1,500 as a % of 2,000 is a lot , of 20,000 is not worth a posting.

Evidence from the Father
Land That bottom hinged tilt in Windows dont allow as much air to pass through house as side hung If doing x ventilation.

Well if you can get windows for a house for €200 more power to you. If it's 10k, 15k or 20k it's still €1500 and my question was will the difference in u-value ever see the money recouped.

House will have MVHR installed since I did say Airtightness target in below 1 so what relevance has air circulation through a window got to do with my query??

db

I have casement windows about the same size as yours and after 2 years have had no problems. They are not hinged on the side however, the hinges are top and bottom about 20cm from the side so even when open there is no pressure on the hinges. I can see how the hinges would loosen over time if you have them on the side of the window.

ht9zni1gs28crp

This week I had mine installed, opening inwards and tilt operation. 1500mm x 1100mm single pane for some of them. Passive Certified. Single handle to operate.

Have you seen any of these two companies units installed and operational? That may help decision, it certainly did for us.

New Build 2015

miller_63 wrote: »

This week I had mine installed, opening inwards and tilt operation. 1500mm x 1100mm single pane for some of them. Passive Certified. Single handle to operate.

Have you seen any of these two companies units installed and operational? That may help decision, it certainly did for us.

Can you PM me your window supplier please?

hexosan

miller_63 wrote: »

This week I had mine installed, opening inwards and tilt operation. 1500mm x 1100mm single pane for some of them. Passive Certified. Single handle to operate.

Have you seen any of these two companies units installed and operational? That may help decision, it certainly did for us.

I ruled out tilt and turn as it restricts the options for blinds and the other half isn't a fan of them mounted on the window frames.

ht9zni1gs28crp

hexosan wrote: »

I ruled out tilt and turn as it restricts the options for blinds and the other half isn't a fan of them mounted on the window frames.

This has been considered, given the amount of times our windows will be open versus amount of windows needing blinds we were happy to work around it. I think something like two of our windows are to bedrooms which will have curtains. Everywhere else we are private enough to not warrant blinds/curtains etc.

BarneyMc

I fixed a lot of my windows (no opening whatsoever) so they just have plane glass. None of these were at the front of the house so it didn't affect the look (at the front). Maybe this isn't a possibility for you?

fatty pang

hexosan wrote: »

Company M have a 90mm profile window which is passive house certified at 0.7 W/m²K
Company M claim there's no issue whatsoever making a casement window that size opening out. I'm puzzled over the conflicting views on this matter and don't know who to believe.

It might be interesting to ask ‘Company M’ to see a test report for the EN 12400 classification (number of opening and closing cycles, operating forces) they have achieved for the 900 x 1500 (triple-glazed) side hinged casement. A similar window listed on the BBA website only shows test results for a window of 900 wide x 1200 high (almost 20% smaller) that achieved a less than impressive 450Pa watertightness result.

“Passive House Certified” is only a thermal simulation and pretty meaningless as an assessment of the durability and suitability of a window for the Irish environment. There are timber and alu-clad timber windows being specified for PH projects by architects who have minimal understanding of what is suitable for long term durability in this climate.

fatty pang

Calahonda52 wrote: »

Evidence from the Father
Land That bottom hinged tilt in Windows dont allow as much air to pass through house as side hung If doing x ventilation.

Hardly any side hung windows in DACH area so I'd wonder what is being compared ?

Drift

There's a coMpany that I have had a lot of problems with in the past (particularly in terms of service and fitting) and would steer clear of - even if they gave me a u-value of 0.0001 for €20!

rampantbunny

Company M did my garage windows and door because they were cheap and quick. Didn't even contemplate house windows from same company.
Even now, the garage door doesn't shut properly. Ah well, I can't say I didn't expect it.

893bet

It is testimony to the poor reputation of company M that no one is in any doubt as to who they are.

bmm

Its the other suppliers that i am trying to figure out?