how to install cavity wall insulation. how to install kingspan insulation. how to install Jablite insulation. how to install 1200mm x 450mm cavity insulation
Thanks for this mate, exactly the info I was looking for as I'm blocking up a large window soon and laid lots of blocks garden walling and my single skin garage but never cavity. Great vid, cheers... Oh and I'm in Swansea so keeping it local like ;)
@@brickrightbuildinglandscaping just like hoovers have different power of suction the insulation boards have different u values as you know. Great video thanks for sharing. Also noticed there was a gap between the insulation board and inner leaf, is this a problem? Or should it be a tight fit between the outer leaf and inner ?
@DP-bo4yw As long as you check your boards with the specs on the plans and they are the same then if it's a different make it's fine .kingspan and celotex are brand names we use those names meaning insulation. As for the gap you mentioned spot on .install with no gaps the clips used are a bit hit and miss to be honest. It's also now since the video was made to tape the joints of the boards for maximum u value . Hope that helps you out 👍
So the bricklayers put the insulation in, as they are building the wall isit? I thought the brickys built the wall to the top, then the insulation gets added at the end
Horizontal wall ties every 750 mm and vertical every 450 mm . Also every 225mm at a window or door opening. Hope that helps you anything else let me no 👍
@@newry123 Hi So every course of blocks or every 3 courses of bricks which is 225mm add a wall tie so this is vertically. This is to strengthen the reveal at a door or window opening. Hope I've that helps 👍
@brickrightbuildinglandscaping Hi thanks for the fast response. If it was put on the external skin, would this mean that the build would not pass building regs?
I’m putting 50mm kingspan in the cavity but my builder is recommending 100mm dritherm because he said the clips pop off on kingspan ..I’m sticking with kingspan as the u rating is better
Paul any change off plan always check with building control if it ok otherwise they may not pass is. The benefit of kingspan is usually you still have a cavity gap let the air flow .Good.luck
@hugostiglitz4777 depends what the specs are in the building process timber frame or solid walls etc. In terms of the 50mm gap in solid work then yes but i have to say we follow the plans provided. Look up oakwood garden rooms on RU-vid liam has all the answers over there tell him justin @ Brickright sent you . Good luck 👍
Ok Shane You would need an inspection to clarify the specifications different parts of the country have different specs .Here in wales I used 100mm concrete blocks in and out with a 125mm cavity and the inundation boards were 75mm thick so for my area that is the specifications. Just check what works in your area first .hope that helps you mate good luck 👍👍
I've always had an issue with those red fixing disc things... they expand, contract expand again and fall off... why can't they have a little barbed prong on them that sinks into the insulation or something. I am so paranoid about this that I over-engineer things. Building control guy is happy that I sink nails into the sides of the batts, pointing upwards, then I squirt expanding foam on the back surface of the batt, slide it onto the sticking up nails and squeeze it firmly to the wall with various methods of keeping it tight to the wall so that the foam doesn't have a chance to expand but it glues it like mad to the blockwork. Then I stick nails in diagonally in the corner of the batts which finally galvanises the whole batt system as one glorious strong sheet. finally I put those stupid useless token red plastic discs on for show so they can fall off and fill the cavity....at least that would happen if I didn't run the aluminium tape over the joints and run it over the stupid red plastic discs. 😃
@@brickrightbuildinglandscaping Yeah I know they have the two gauge holes, but still - a tiny adjustment in the manufacturing process to leave one or two barbed prongs sticking out would make a universe of difference...the answer is so simple, an idea like that could make an entrepeneur on Dragons Den millions... and then I could sleep at night.
Is full fill insulation such as rockwool easier to install then partial rigid boards? I can imagine the wall ties are a pain, and you can see that here. Rigid panels must be harder to get without gaps too?
I like the rigid better than rockwool stuff itches and gets in the eyes. Tape the joints so no gaps .ultimately its whats stipulated on the plans but rigid all day long for me 👍
Maybe a 60 or 50mm board would be better .They like a ear air flow in the cavity here wales this job was a 45 mm clear air gap cavity. Id check the plan or at least ask the architect or building control or the council office for some guidance every area is different i can only comment on whats excepted here .hope thats ok . Good luck Justin 👍
why dident you insert a wall tie on top of the last course of blockwork before laying the course of brickwork.??it would have kept the in the insulation.????? at the top.
Is it normal to bend the wall ties up to slide in the pir, can they not be placed in without doing this? I couldnt see you bending them back down when you added the next row of pir?
Hi.Dan Bricklayers judt bend them as its easier to vet the insulation in without snagging on a wall tie thats all.bend em if you want or don't makes no issue either way . Thanks Dan Justin 👍
@@handle1196 No, this weakens them, obviously. Although maybe if it's only done once it might not be the end of of world, but they're bent up and then back down, not ideal. I'd also wonder if they are the correct strength of wall tie for the job, especially given the 125mm cavity.
@@brickrightbuildinglandscaping Thank you sir for your fast response. Just having a orangery installed at the moment and celotex insulation fitted behind the brickwork with the join spacers like you used here but definitely no barrier tape at all used? Will the building regs no this? Because they didn’t come out during the footings stage befor concreting install. Thank you for your time much appreciated 👌🙏
@squeelerjakeaxcradle7095 If you have any dought ask the builders or if you've payed for building regs. You can ask the building inspector for advice. Should of in my opinion been inspected before concrete footings go in if its listed as needing building regs . Good luck Justin 👍
I see brickies on RU-vid in London using insulation with out any foil on either side It's more like rock wool than insulation How is this getting passed Along with brick on the outside leaf Very strange
Yea the brick the outside first to to set out the brickwork then the internal blockwork goes in and the installation. Mostly in wales its the other way around because we use mostly foil backed installation which is clipped to the internal blockwork .just a different specification working in different areas of the uk .easier there way to set up brickwork first but i think foil backed installation like celotex or kingspan is better .Bricklayers just follow the drawing David . Justin 👍