insulation

Hi, I would like a view on how best to close the cavities around window and door openings. The wall is 7N blockwork on the internal leaf and rough stone on the outer, which results in a very undulating cavity size. I have 80mm tongue and groove insulation in a 150mm cavity. The stone is at...

Dear all, First timer here, really impressed with the wealth of knowledge here and hopefully someone can help me too. I have basic DIY knowledge and have been experimenting/learning on my own house since 2016. We live in an old house that has 20cm exterior polystyrene insulation all around it...

Hi, I'm cracking on with a full 1930's uk house renovation with couple extensions...I'm not far off roof height and got unsolved problems regarding loft floor boarding and insulation. The existing loft floor joists are 3.5inch(h)x2inch(w) and sit across 4 internal load supporting walls. The...

I just bought my first flat, the building was originally a single storey with ridged dormer windows to the front. Not sure when it was split into 2 properties or when the flat roofed dormer went in at the back. I was removing plasterboard to put in a shower and found a low stone wall, covered in...

Hi I am looking to get some injectable foam insulation for a flat roof celling that has some spaces in the existing insulation. I am aware that you can buy big kits that you might use to fill up large spaces like a wall or something. However I just need a small amount for some gaps in the...

Part converting garage to 2.4m x 2.4m utility. Have levelled concrete floor, 1200dpm, fitted 100mm then 50mm (90 degrees) solid insulation. Vapour barrier then tongue and groove 18mm MR chipboard, glued. Was quite pleased. Have recently read on some insulation websites that there should be...

I`m doing a bit or renovation and I have 100mm of concrete sitting directly on soil. Removing it to poor a proper concrete and then 200mm insulation would have a massive cost impact and this is not feasible. I was thinking to poor 30mm or screed to level up all ground floor and then 18mm floor...

Coming to the problem fresh, I imagined that there will be a 'sweet spot' for insulation sizing for each size of pipe and for each ΔT that reflects the law of diminishing returns. Has anyone already done calculations on heat losses that can validate or refute my approach to this? Using the...

Hi lads Can I use 50mm or 75mm in cavity walling and not use the 100mm, its a small music room extension and trying to cut back in costs? 100mm fully fills the cavity I know but would it be k to not totally fill it. Thanks S

Hi Garden detached room under construction . Warm roof will be used (18mm osb then 100 celotex then 18 osb) Query : Insulation with the eves at end of joist runs, as there are noggins etc please see attached Before answering - thanks

Hi All I am planning on insulating my 1st floor bay window using celotex or similar between the joints. I have removed the plaster and lathe, but now I have a question. The void between the joints drops down below the floorboard level, and seems to be a void until just above the ground floor...

Hi, Would be nice to put some boards down for storage in this Victorian roof space and be able to move around, store Christmas decorations and other stuff. It's at the back above my sons bedroom, accessed from a hatch on the landing - headroom in centre is about 5', there is no lighting. The...

Hi all, We're currently in the middle of an extension build and at the point that we need to start ordering our UFH material. We have a kitchen that has been measured up to 30sq with the appropriate areas being removed for units and 100mm distance away from sides as well as a 2.5sq for the...

Hi Everyone. I made request to Anglia water to replace my lead pipe with a new polyethylene pipe. They sent me instruction on how the pipe should be laid but I`m struggling to source material at moment. I have attached guide for your reference. They suggest a 25mm pipe. Is this good enough...

Dear All I found some unknown board (as picture attached) are laying on top of the thermal insulation roll in my loft. Some of the are in bad condition. I suspect that caused woodlice. I would like to replace them. Do you all think that is a good idea and may I know what kind of board is that...

Hi guys/gals I’ve just had a plans appraisal back from our independent buildings inspector regarding a rear extension and loft conversion. He’s asked my architect to explain how the existing gable end wall will be insulated to ensure a u-value of 0.28W/m2k. Obviously the most practical way of...

Hi there, I’m currently renting a mid-terrace house with some friends. The top floor consists of two attic rooms and a landing, which are all freezing. Both bedrooms have access to the eaves, and after crawling around inside, it turns out that most of it is uninsulated, apart from about 30mm of...

We’ve been painting the walls around our windows and to do so we have removed the sealant - the idea was to paint and use a mould resistant sealant (we’ve had condensation and water build up issues before) however the gap is very large. Does anyone have any suggestions on what I should use...

Hi, Just removed my old T&G plank and at the beginning I though that below I had a very strong Concrete flooring but this is not the case. I made few trial hole and the drill bits goes in like a soft cream and what come out is a black soil. the all flooring does not sound very strong and my...

Hi. This is my first post here and I was hoping for some advice. I've recently moved in to a new house, built around 1900-1910. It's a terraced house, and we're on the corner. One of the previous owners has done what I would describe as a "partial" loft conversion. It's not a "room" - it has a...