Browse Forums Heating, Cooling & Insulation Re: Retrofit fiberglass wall insulation against weatherboard 3Jul 06, 2022 11:55 am 711, what did you end up going with? What products? I'm in a similar situation at the moment. We have the internal walls off our bedrooms at the moment. No insulation just hardwood timber frame and weatherboard cladding. I'm thinking of using enviroseal RW wrap between the studs and just glasswool insulation infront of it. Then plaster it all back up. Re: Retrofit fiberglass wall insulation against weatherboard 4Jul 06, 2022 10:34 pm Hi Sjh9 In the end I decided to follow the New Zealand standard for retrofit insulation. https://www.buildmagazine.org.nz/articl ... fit-update However if you leave a 20 mm air gap then you cant put a 90mm batt in the wall, so I also battened out an extra 20mm into the room to allow for 90mm batt. As I now have an air gap I wanted to take advantage of this and create extra thermal insulation by using a wall wrap that has a reflective side facing the air gap. The best product I could find to try and meet all the best characteristics is James Hardie Hardie Wrap (sold at Bowens and some Mitre 10s). It is a class 4 vapour permeable membrane, its an air and water barrier, it has a low emittance reflective side that is designed to face outwards (no other product is designed like this). Its not perforated (aka not a foil), it is actually like a membrane with a reflective side. The downside to HardieWrap is the vapour permeance isn't as high as other membranes but its higher than all perforated foils and is still a class 4. I used a staple gun to staple in the wrap 20mm away from the wall. I put a piece of tape wrapped around the staple gun as a marker so that it was easy to measure 90mm in from my battens. It created enough tension in the wrap to hold it off the weatherboards. I worked my way from the bottom from side to side to keep it tensioned. At the bottom the wrap is directed back to the weather boards just in case condensation drips down it wont sit on top of the bottom plate. The other benefit for battening is that it gave me a method to level out the wall as well, I used window packers to do this. I decided to use fibreglass batts over polyester purely as you will get an extra 0.2 R value. My wall structure is: - Weatherboards - 20mm air gap - James Hardie Hardie Wrap (foil facing weatherboards) - R 2.7 fibreglass batt - Plasterboard It should give me a wall R value around 3.4. If you just want a membrane I would go for Amatelin VapourTech Brane (you can get it at Bunnings). It has the highest vapour permeance, is a water barrier, but not an air barrier. This was my other choice if I could not find a reflective membrane. Note, it is allot of fiddly work, but my goal was to get the R value up as high as possible. I'm aiming for an 8 star house minimum. Re: Retrofit fiberglass wall insulation against weatherboard 6Jul 13, 2022 10:08 am Thanks for the detailed response. It's rare to find out what OP ended up doing! Seems like a good solution. I have put in battens for one wall as it was fair off straight but the other i dont think i will as there is a window and the existing sill is good and the wall is rather straight. So i might leave that one and just use 75mm earthwool. As far as the wrap goes the hardiewrap looks like a good product. However i might just use the amatelin as i can source it easy and i'm not too concerned about r rating. In a few years time we will reclad and i can redo it all properly with battens on the exterior to create the airgap between the wrap and weatherboards. Only thing i'm having trouble getting my head around is i have a horizontal piece of timber running along the top of the window. Its flush against the weatherboards and is around 40mm thick. Not sure if i just staple to the back of it. But i dont want moisture getting between the wrap and the timber and having no way to drain. Did you have something similiar with your windows? Re: Retrofit fiberglass wall insulation against weatherboard 7Jul 13, 2022 11:13 am Sjh9 Thanks for the detailed response. It's rare to find out what OP ended up doing! its only rare when someone necros a 9 year old post. This was from this year Dark matter scientist, can breathe underwater, mind reader and can freeze matter just by willing it. Trust me, its in my sig. Re: Retrofit fiberglass wall insulation against weatherboard 8Jul 13, 2022 11:31 am Sjh9 It's rare to find out what OP ended up doing! When they find out what's actually required they rarely follow the correct certified solution Hence most never post back . Sjh9 Seems like a good solution. Hint...No name wordsmiths cant certify Squat (humour) Turn to the US codes for vapour and flashing details you'll need head and sill over flashing If you want better replies put up better info plus it also helps others hth Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Retrofit fiberglass wall insulation against weatherboard 9Jul 13, 2022 12:19 pm StructuralBIMGuy Sjh9 It's rare to find out what OP ended up doing! When they find out what's actually required they rarely follow the correct certified solution Hence most never post back . Sjh9 Seems like a good solution. Hint...No name wordsmiths cant certify Squat (humour) Turn to the US codes for vapour and flashing details you'll need head and sill over flashing If you want better replies put up better info plus it also helps others hth do you even understand the context of the post I made? You are a literal moron. Here it is in simple English - The guys says it is often rare to find out what happened in an op's situation. I say its only rare when somone asks a question on an old long forgotten post where somone no longer is a forum regular. What has that got to do with your stupid response? YOU HAVE THE ABSOLUTE POOREST COMPREHENSION OF ANY HUMAN BEING I HAVE EVER MET. Dark matter scientist, can breathe underwater, mind reader and can freeze matter just by willing it. Trust me, its in my sig. Re: Retrofit fiberglass wall insulation against weatherboard 10Jul 13, 2022 12:42 pm Noname YOU HAVE THE ABSOLUTE POOREST COMPREHENSION OF ANY HUMAN BEING I HAVE EVER MET. LOL...Why don't you certify his description with your story telling ability? Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Retrofit fiberglass wall insulation against weatherboard 11Jul 13, 2022 12:48 pm StructuralBIMGuy Noname YOU HAVE THE ABSOLUTE POOREST COMPREHENSION OF ANY HUMAN BEING I HAVE EVER MET. LOL...Why don't you certify his description with your story telling ability? This doesn't even make any sense. You don't certify descriptions for one. Would you certify a frame from somones description of it on a forum? I really hope not. Lol I stand by my statement that you have the poorest comprehension of any human I've ever met. I'm almost convinced you're a bot. Dark matter scientist, can breathe underwater, mind reader and can freeze matter just by willing it. Trust me, its in my sig. Re: Retrofit fiberglass wall insulation against weatherboard 12Jul 13, 2022 12:55 pm Go back to your computer dude, construction/ engineering is beyond your scope. Take your blood pressure medication and have a lie down (humour) OT the guys would have a lot of fun with you on a real building site...Go figure Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Retrofit fiberglass wall insulation against weatherboard 13Jul 13, 2022 1:05 pm StructuralBIMGuy Go back to your computer dude, construction/ engineering is beyond your scope. Take your blood pressure medication and have a lie down (humour) OT the guys would have a lot of fun with you on a real building site...Go figure Wasn't even in reference to construction you idiot. So yeah there's that. Tell us again how meta/Facebook is going to take over construction and how getting your own data and proofs is important to combat it lol. Dark matter scientist, can breathe underwater, mind reader and can freeze matter just by willing it. Trust me, its in my sig. Re: Retrofit fiberglass wall insulation against weatherboard 14Jul 13, 2022 1:20 pm StructuralBIMGuy ....... OT the guys would have a lot of fun with you on a real building site...Go figure On second Thoughts, We can't allow you on a real building site You'll burn down the next doors neighbours house in 4-7 mins? You're a Dangerous Idiot Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Retrofit fiberglass wall insulation against weatherboard 15Jul 13, 2022 3:03 pm StructuralBIMGuy StructuralBIMGuy ....... OT the guys would have a lot of fun with you on a real building site...Go figure On second Thoughts, We can't allow you on a real building site You'll burn down the next doors neighbours house in 4-7 mins? You're a Dangerous Idiot There is literally proof in the thread that SHOWS you how a house will burn down in 4-7 minutes. I suspect you haven't bothered watching it, or listening to the fire authority describe it in the video. seeing as were posting links to stupid things you say - remember this one? Literal fruit loop territory viewtopic.php?f=2&t=103796&p=1899089&hilit=Metaverse%2C+Metahomes%2C+FB+banks+on+VR+Homes#p1899089 Here's the one where i prove you cant do simple maths after you tell me to "brush up" on MY maths .You literally get destroyed. "The investment return on a dilapidated house in an expensive area is <50c m2/week ..lol, thats probably why they are selling it" BAHAHAHAHA viewtopic.php?f=1&t=102752 Maybe this one where you cant get your own story straight? viewtopic.php?p=1899743#p1899743 Or this one rofl viewtopic.php?f=31&t=103773&p=1898949#p1898949 Another comprehension one lol viewtopic.php?f=31&t=103588&p=1897997#p1897997 I have more. would you like to see them? HTH Maybe you can remind people why everyone at vectrorworks forums thinks you're stupid and kicked you out? It explains why you're here, you can fake it here. You've been called out by several professionals on this forum as nonsensical too. The facade is crackling mate. keep up the good work (humor) Dark matter scientist, can breathe underwater, mind reader and can freeze matter just by willing it. Trust me, its in my sig. Re: Retrofit fiberglass wall insulation against weatherboard 16Jul 13, 2022 3:36 pm Noname StructuralBIMGuy StructuralBIMGuy ....... OT the guys would have a lot of fun with you on a real building site...Go figure On second Thoughts, We can't allow you on a real building site You'll burn down the next doors neighbours house in 4-7 mins? You're a Dangerous Idiot There is literally proof in the thread that SHOWS you how a house will burn down in 4-7 minutes. I suspect you haven't bothered watching it, or listening to the fire authority describe it in the video. That's a poor mock up of a room, that demonstrates the flammability of its hydrocarbon base contents? What's the FRL in Construction for a timber frame with one sheet of gyprock on one side take a guess ? it's non compliant There is no FRL for 4-7 mins you fool. Fires have to also be contained You've go the whole street burning down (humour) Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Retrofit fiberglass wall insulation against weatherboard 17Jul 13, 2022 3:47 pm StructuralBIMGuy Noname There is literally proof in the thread that SHOWS you how a house will burn down in 4-7 minutes. I suspect you haven't bothered watching it, or listening to the fire authority describe it in the video. That's a poor mock up of a room, that demonstrates the flammability of its hydrocarbon base contents? What's the FRL in Construction for a timber frame with one sheet of gyprock on on side take a guess ? There is no FRL for 4-7 mins you fool. Fires have to also be contained You've go the whole street burning down (humour) I have seen a fire burn like the personally in a neigbours home. from start to finish. that is almost a 100% accurate representation of the spread . If you don't believe it, i invite you to light your own home on fire and sit back for 4-7 minutes to prove me wrong. The problem with your argument about the FRL of a timber frame and one sheet of gyprock is that its not a real world example. Its those materials in isolation. Not an example of a house thats being lived in with furnishings and variously poorly managed penetrations as is common in alsmost all residential builds. The FRL is meaningless in a class one building that's been engulfed in flames for the time it takes a fire engine to arrive. It provides for an opportunity to escape the fire rather that if falling down around you before you get a chance to escape. The FRL means squat when your class1 building has been totally engulfed in flames, then saturated 12 minutes later by 1000's of liters of water when the fireys arrive. Those homes arent being stripped back to frame and renovated, they're being torn down. So what use is a 60 Min FRL in a single detected class 1 building oh wise engineer? For all intents and purposes, this is what your house "burning down" is. Its agnostic of the FRL. also while you are explaining that, mind answering the question Ive been asking now for a year, how did you get basic maths wrong? Dark matter scientist, can breathe underwater, mind reader and can freeze matter just by willing it. Trust me, its in my sig. Re: Retrofit fiberglass wall insulation against weatherboard 18Jul 13, 2022 4:01 pm Noname I have seen a fire burn like the personally in a neigbours home. from start to finish. that is almost a 100% accurate representation of the spread . If you don't believe it, i invite you to light your own home on fire and sit back for 4-7 minutes to prove me wrong. You are a nut case... no one should try what you are suggesting. Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs Re: Retrofit fiberglass wall insulation against weatherboard 19Jul 13, 2022 4:02 pm StructuralBIMGuy Noname I have seen a fire burn like the personally in a neigbours home. from start to finish. that is almost a 100% accurate representation of the spread . If you don't believe it, i invite you to light your own home on fire and sit back for 4-7 minutes to prove me wrong. You are a nut case... no one should try what you are suggesting. Explain what it is I'm suggesting? Because as far as I can tell i haven't suggested anything actually. There's that lack of comprehension again. Edit - Oh you mean the suggestion of you lighting your house on fire? wow....Yeah i don't think anyone is so stupid to take that seriously. Including you (although, i dunno). That's a device to get you to think about the relevance of your FRL argument. Most people could understand that without having it explained to them. Dark matter scientist, can breathe underwater, mind reader and can freeze matter just by willing it. Trust me, its in my sig. Re: Retrofit fiberglass wall insulation against weatherboard 20Jul 13, 2022 4:23 pm Noname ... Those homes arent being stripped back to frame and renovated, they're being torn down. So what use is a 60 Min FRL in a single detected class 1 building oh wise engineer? For all intents and purposes, this is what your house "burning down" is. Its agnostic of the FRL. Our houses here are concrete slab, Double brick ( masonry FRL 240) Ask a fire engineer about it being OK to repair Because you know SFA Designer,Engineer (Civil,Const & Envir),Builder,Concrete & Masonry Contract.Struct Repairs DIY, Home Maintenance & Repair I'm in WA and our sandy soils make drainage a bit easier but this is what I'd be doing. Dig down to your footings and let the wall dry out. Clean it all well by brushing… 1 6113 6 5383 Good on you for having a go I am the opposite of DIY (so will pay a builder) - our vibe is industrial/simple so current thinking is 150mm concrete and then internally is… 3 3052 |