lauren b

couldnt upload the video from inside.

Hi Everyone - thank you for all your responses... Some photos of the L&P attached and a word doc with the roof build up elevation He talks of a warm roof make up, but then mentions a ventilation gap which would make it a cold roof. Which do you want? ; - i would like a solution and a warm home - ideally cost effective, and also he is no longer my architect. If the current panelling is just fixed directly to the L&P ceiling I don't see it makes a difference. Or are you saying there is some kind of gap between them? - I do not know as I have only investigated from the top (outside in to L&P) - I could take some panelling off from the inside to see how tightly it is all affixed thank you again, also trying to upload of video of the building, we are also insulating the floor, walls etc - and i have had building control approval and i have gone back to them to speak about this potential change roof build up.docx

Hello Nick I'm just worried if I start from above the lath and plaster maybe cross batten to make sure there is a gap ..that the full space original sarking...L&P ...start of insulation is this massive gap that will get cold air stuck in it? The problem I have is I am not an expert so I don't really understand roof insulation or air tightness to a specific value ...yes the whole building is being upgraded, walls, floors and roof I'm really looking to confirm who I can go to ..to under write a new solution that insures I have a warm home 😁

Hello... apologies I hadn't done the introduction and hello section. Sorry!

Hey Jay Thanks. Discovered the lathe plaster ceiling from above when we lifted some tiles from the roof off ..so if insulation goes in from above the ceiling is in the way? Thanks

Hello I am currently converting a Chapel building and unfortunately discovered a lath and plaster ceiling in the roof in between the decorative tongue and groove wooden boards and the rafters ...I have some photos if needed. I had an insulation spec from my architect who I have not taken through to construction stage and I now cannot achieve this spec and the lath and plaster is obviously in the way. The original wooden sarking boards on the inside I really do not want to take down (from a cost perspective) therefore I think the L&P has to remain in place, you could not take it out from above. The building is not listed. Building control do not have a solution as apparently it is not part of their sign off to get the insulation to the spec below. Does anyone know how I would go about solving this problem to achieve the same U value in the original spec, there is maybe an option to raise the roof an inch and therefore create or create a warm roof instead (??) (currently spec is a cold roof design), there are parapet walls in the building so raising the roof would not be too hard. But essentially, if I wanted a re-calculation of the U value to make sure any different insulation arrangement maintains the same U value 0.13 - who would I employ impartially to calculate this or are good roofers able to do this? Sadly my current roofer does not seem engaged in finding a solution which is a shame or potentially it is normal to be provided with an exact design / insulation build up. I have contacted Celotex technical department to see if they can help, but yes sadly this is my first roof so I am quite sad about it Are lath and plaster ceilings frequently found, are there any work around suggestions? The roof spec is as follows snippet from my main spec doc: Install new vaulted warm roof to buildup as follows: I. Existing t&g cladding (painted white) II. 100mm Celotex GA4075 or equiv between purlins, sealed to form airtight barrier to interior with expanding foam/ GAPO tape & foil tape on all joints III. 75mm Celotex GA4075 or equiv between 100mm rafters, allowing 25mm air gap IV. 25x38mm treated battens to form 50mm air gap (continuous ventilation zone to be created from eaves vents to proprietary tile vents placed at suitable intervals near ridge) V. breathable sarking eg Tyvek Supro or equivalent VI. 25x38mm treated counter battens VII. 600x300mm Cedral Thrutone Smooth, Blue-black artificial slate tiles. U=0.13W/m2K thank you if you can help and thank you anyway - Lauren