Retro-fitted double glazing?

[steve_t]

Well you would be wrong. Membrane roofs have to have vents installed (and they often don't). Standing seam roofs don't have ventilation gaps (unless you build them in, and often aren't) etc. If you use the wrong underlay you will greatly reduce the benefit of natural diffusion through ventilation even through the ridges of corrugated iron. However your statement is correct IF your roof is well ventilated.

Last summer I was climbing around in my roof space and I was sweating like a .... Anyway, I realised that while I had ridge venting, there weren't any actual soffit vents. BRANZ seems to reckon that the 'stack effect' and wind is enough for adequate ventilation of the roof space but I wasn't convinced. So yeah, not sure what constitutes adequate roof space ventilation but I'd think soffit vents would be a good idea

[BMWST?]

Well you would be wrong. Membrane roofs have to have vents installed (and they often don't). Standing seam roofs don't have ventilation gaps (unless you build them in, and often aren't) etc. If you use the wrong underlay you will greatly reduce the benefit of natural diffusion through ventilation even through the ridges of corrugated iron. However your statement is correct IF your roof is well ventilated.

yes afaik the hrv-dvs systems rely on the roof space being very well ventilated,ie no real impediment to new air to come into the roof space.When i talk roof space i mean the typical piched roof of iron,or tile

[flyingcrocodile46]

Last summer I was climbing around in my roof space and I was sweating like a .... Anyway, I realised that while I had ridge venting, there weren't any actual soffit vents. BRANZ seems to reckon that the 'stack effect' and wind is enough for adequate ventilation of the roof space but I wasn't convinced. So yeah, not sure what constitutes adequate roof space ventilation but I'd think soffit vents would be a good idea

I have wondered that myself. I see older houses circa 50/60's with hole punched soffits (presumably commercially produced) that tend to indicate a temporary tilt toward recognition of the wisdom of soffit ventilation. I have a bit of a library of technical training books from the mid 40's through to current, but can't find anything on soffit venting. The yanks are way ahead of us on this stuff (except we don't want moisture barriers on the insides of walls... due to our higher humidity levels.)

[caseye]

Having been around when they were constructing the house, I'm pretty sure it's particle board. So the stuff that you think I have is not the stuff that I have that you thought I had as I know the stuff that I have and think it's not the stuff that you thought it might be. I believe this stuff is manufactured in Taupo and iffen I remember correctly they wanted to open another plant somewhere.

Cool story though murderer

You are right in the plant location being Taupo. It was Triboard NZ LTD at that time. I am partially right in saying Strandboard. The flooring product was Strandboard, 20mm thick and so much better than particleboard ever could be. I was wrong in saying that the walls and ceiling panels were strandboard. They were in fact Triboard ( strandboard inner core with MDF or Customwood outer layers) These panels were used as internal walls and ceiling panels, depending on load or application they ranged in thickness from 22.5 mm and included 32mm ( used for doors) to 110mm for external wall substrate.
Sheet sizes were also variable but notable for their exceptional 3600x 2400 panel sizes, stretching out to 7.2m lengths when ordered specifically.
There is and has not been any other product like it in NZ before or since.
The product is brilliant and when used properly and vented correctly the homes they create are awesome, warm in winter, cool in summer and with very little internal temperature fluctuation.
The vents I spoke of, were however, absolutely necessary for these homes to breathe correctly and to function properly when it came to moisture.
I know Croc will confirm the product, perhaps not that all constructors did their job properly in it's correct application and fitment.
I know what I know as the company I worked for at the time was the only one's who supplied all other building materials to Triboard NZ for the building of their prototype and subsequent homes.
it worked and worked well and we supplied many homes which I know are still going strong today, 2 story ones and more.

[mashman]

You are right in the plant location being Taupo. It was Triboard NZ LTD at that time. I am partially right in saying Strandboard. The flooring product was Strandboard, 20mm thick and so much better than particleboard ever could be. I was wrong in saying that the walls and ceiling panels were strandboard. They were in fact Triboard ( strandboard inner core with MDF or Customwood outer layers) These panels were used as internal walls and ceiling panels, depending on load or application they ranged in thickness from 22.5 mm and included 32mm ( used for doors) to 110mm for external wall substrate.
Sheet sizes were also variable but notable for their exceptional 3600x 2400 panel sizes, stretching out to 7.2m lengths when ordered specifically.
There is and has not been any other product like it in NZ before or since.
The product is brilliant and when used properly and vented correctly the homes they create are awesome, warm in winter, cool in summer and with very little internal temperature fluctuation.
The vents I spoke of, were however, absolutely necessary for these homes to breathe correctly and to function properly when it came to moisture.
I know Croc will confirm the product, perhaps not that all constructors did their job properly in it's correct application and fitment.
I know what I know as the company I worked for at the time was the only one's who supplied all other building materials to Triboard NZ for the building of their prototype and subsequent homes.
it worked and worked well and we supplied many homes which I know are still going strong today, 2 story ones and more.

Wasn't doubtin ya at all mate. It was Maxim panel when we had this place built and I might have the specs lying around in some draw somewhere for what it is. The cross sections and the cuts they made for ceiling, wall or inner wall were all the same stuff. I was told it was particleboard... it may have strands in it, dunno, but there were no sheets in this stuff... none that I saw anyways.

As ya say, it is damn good stuff. Do you know if the could make an arc out of the stuff?

[flyingcrocodile46]

You are right in the plant location being Taupo. It was Triboard NZ LTD at that time. I am partially right in saying Strandboard. The flooring product was Strandboard, 20mm thick and so much better than particleboard ever could be. I was wrong in saying that the walls and ceiling panels were strandboard. They were in fact Triboard ( strandboard inner core with MDF or Customwood outer layers) These panels were used as internal walls and ceiling panels, depending on load or application they ranged in thickness from 22.5 mm and included 32mm ( used for doors) to 110mm for external wall substrate.
Sheet sizes were also variable but notable for their exceptional 3600x 2400 panel sizes, stretching out to 7.2m lengths when ordered specifically.
There is and has not been any other product like it in NZ before or since.
The product is brilliant and when used properly and vented correctly the homes they create are awesome, warm in winter, cool in summer and with very little internal temperature fluctuation.
The vents I spoke of, were however, absolutely necessary for these homes to breathe correctly and to function properly when it came to moisture.
I know Croc will confirm the product, perhaps not that all constructors did their job properly in it's correct application and fitment.
I know what I know as the company I worked for at the time was the only one's who supplied all other building materials to Triboard NZ for the building of their prototype and subsequent homes.
it worked and worked well and we supplied many homes which I know are still going strong today, 2 story ones and more.

Hey Caseye, I had a bit of a skim through (didn't fully read) the specs on the Metropanel that Ocean posted so I can now say I probably know as much about it as the old Tri-board homes that I saw being put together (once)

Aside from a few early rumours about moisture damage board and the formaldehyde problem that you mentioned (which I understand was also an issue with some batches of particle board in Chch and has/had been addressed with revised resin formula) I don't know or have heard much about it tbh. However, that in itself is a good thing, as in my work I should have heard of any significant problems about it. Though gotta say I'm a not all that excited about it.

Mashman,
If you have a pitched roof with flat ceiling (big well ventilated roof void), you may well find one of the new ventilation systems will solve your problem.

[Ocean1]

Aside from a few early rumours about moisture damage board and the formaldehyde problem that you mentioned (which I understand was also an issue with some batches of particle board in Chch and has/had been addressed with revised resin formula) I don't know or have heard much about it tbh.

I missed that, it identifies the binding agent as a resorcinol or phenolic resin.

Nawt wrong with that as long as they're mixed and applied correctly. I'd be more worried about the possibility of water anywhere near the edges of the panels. Like an overflowed bathtub or a failed plumbing joint.

[mashman]

Mashman,
If you have a pitched roof with flat ceiling (big well ventilated roof void), you may well find one of the new ventilation systems will solve your problem.

Aye, it'd probably help for those days when it happens. We almost put in a Lossnay... maybe next time. Tis a ?pent/shed? roof. Probably cheaper to just suffocate the familiy

[BMWST?]

i have done trusses for all of those versions..i think the current factory is in huntly

[caseye]

i have done trusses for all of those versions..i think the current factory is in huntly

The plant in Huntly is a private operation,( Name was Riggs, I believe) that does a very good job of cutting to specification and supplying well made panels and complete wall systems depending on what they were asked to make.
All out of Tri Board or Strand board, some Gib lined and battened some not.
Wiring routeing is done at factory, grooves cut into sheet edges and tops to get wiring through but if a new point or switch is required it is a simple matter of routering a trench in the board placing the feed wire in and filling it back up ready to be painted over.
A damn fine idea, pity it's been poo poo'd by so many who have vested interests in the status quo.

[BMWST?]

A damn fine idea, pity it's been poo poo'd by so many who have vested interests in the status quo.

no need to pooh pooh them,they still buy roof trusses ,timber battens etc etc

[caseye]

no need to pooh pooh them,they still buy roof trusses ,timber battens etc etc

Cripes, I'm not poo pooing them, I'm all for them, the system is great , but more stuck in the mud co's don't like their sort of competition is all I was alluding to.

[flyingcrocodile46]

Cripes, I'm not poo pooing them, I'm all for them, the system is great , but more stuck in the mud co's don't like their sort of competition is all I was alluding to.

What difference do the opinions of the 'stick in the mud cos' make unless they are undercutting them on price or slandering them?

[SPman]

Cripes, I'm not poo pooing them, I'm all for them, the system is great , but more stuck in the mud co's don't like their sort of competition is all I was alluding to.

A mate and myself were involved in building Triboard houses back in the late '80's, early 90's. Mate was so impressed with the product, he used Triboard to put a second floor on his house in Glen Eden. We built 7 or 8 and an office block. you had to be quite particular about edge sealing, from memory. Also built a few Maxim board houses around 2000. I preferred the Triboard. Both sorts of houses seemed very acoustically loud (all those hard surfaces?) and were a bugger to get a high quality flat finish on the walls. The guy who developed Triboard, (forgotten his name) lost $29 mill when he had to sell his Kaitia factory back in the late 80s. We did some work for him and also did some renovations on his son's house in Epsom (using Triboard, of course)...

[steve_t]

Spoke to my colleague with the metrapanel house. She notes there's not really an issue with condensation but they do have good ventilation with a ducted airconditioning system. Another one said they have terrible condensation in their new house (stick frame) even though it has double glazing. Apparently there are no drainage holes since the windows weren't supposed to have condensation... And they didn't go with thermally broken windows as it was going to add $10,000 to the cost of the windows I guess it would have been $10,000 well spent as apparently the window frames are always covered in condensation and the water has dripped down and damaged the floor They complained to the builder who advised them to buy a dehumidifier

So, by the sounds of things, the metrapanel/triboard stuff isn't any more of a contributor to condensation issues than stick frame and gib. It's more ventilation and insulation etc. Well, that's just one person's take on it anyway.