vapour control layer

I'd like to add additional insulation to a vaulted ceiling with exposed rafters by adding 70mm foil backed celotex between the rafters and plasterboarding over. My concern is that there is an existing VCL (polythene sheet) that I'd be insulating underneath. The existing roof consists of 80mm...

Hello, I am converting the garden brick shed into a garden office and music room. It is built from brick walls with a concrete floor. I’m planning to building a stud wall and insulate with mineral wool (rockwool). the brick wall is essentially the garden wall, where they have popped a...

I'm currently in the process of insulating my garage (cold roof). I'll be using a Moll Intello vapour control membrane after the insulation and before battens and plasterboard. The boiler is currently located on the brick wall and as such can't be wrapped (sealed) with the membrane. Is it...

Timber Frame annexe has cladding, battens, breather membrane, OSB, then 150mm timber frame wall Inside: celotex between studs Then what's my best option as regards insulating, vapour barrier , service voids etc A multi foil insulting vapor barrier seems a good idea ??? If constructing...

Have a good amount of damp proof membrane left which my builder previously used when laying down concrete. Really heavy duty stuff this: https://www.screwfix.com/p/capital-valley-plastics-ltd-damp-proof-membrane-blue-1200ga-15-x-4m/98181# I'm fixing insulated plasterboards with built in vapour...

I’ve read all the previous threads about this topic but it doesn’t resolve my query. I am going to use 100mm fibre insulation between the joists supported by mesh/netting underneath but do I need a vapour proof membrane over the top before relaying the floorboards? The floor is well vented...

new built detached outbuilding/store/workshop modern build concrete blocks/cavity insulation/thermalite blocks inside (won't be skimmed or boarded) floor insulated mono pitched low pitched roof occasional heat but more about keeping stuff dry as opposed to getting moisture damage in old shed...

HI, I am new to the forum. I have a new build finished and been living in this past year. The builder forgot to add vapour control layer to the ceilings as shown in red on the attached section image. 2 coats of emulsion paint have been provided to the ceilings. There are no visible issues but I...

Im building a three sided timber stud wall to create a shower enclosure and using aquapanel cement board over the studs. Theres a lot of conflicting advice online re whether to install a vapour control barrier behind the aquapanel or tank the surface before tiling (or both!) to ensure its...

I've built a garden office last year and is well insulated, breathable membrane, air gap then cladding for breathable aspects. On the warm side i.e. before internal walls is vapour barrier which I research as the best for stopping moisture in winter, and effectively creating a sealed box. The...

Hi, After some advice / assurance of the method Im'm looking at meets some of the 'best practice' for insulating a single brick wall ensuring (if done correctly) shouldn't be any issues surround damp etc. Any advice would be appreciated or just a "yes sounds fine" or "Nooooo" :D I propose to...

Hi all, I'm building a timber framed garden room with a flat warm roof. my build up for the roof will be: joists 18mm OSB3 sub-deck vapour control layer 100mm foil backed celotex GA4100 or similar 11mm OSB3 top deck EPDM My questions are: 1. Do I need a VCL considering the foil on the...

Not sure where to post this query, but hope someone can help. I've mostly built a garden studio, insulated, cladded and now onto the internal finish with the vcl, but am unsure how to approach the electrical sockets, window frames and doors. How do you get around sockets, frames, fixings for...

Hello group, I'm planning the upgrade to my garage to make it a more pleasant (=warm) place to work on the car. It will not be habitable space. The garage construction is fully detached from the house and built as follows: Walls - 215mm solid wall of 102mm facing brick tied to 100mm block...

Hi, this is my first time posting on here I'm just looking for bit of advice on insulation and the vapour barrier? My garage is single brick and I had a local builder batten out the garage ready for the insulation. What I noticed is that he fitted a plastic sheet behind the batons before...

We are busy renovating a property built in the 1930s. As we go along we inevitably find things that are a bit surprising, forcing us to change our initial plans. We would like to ask for advice on what the best course of action is to clad the upstairs area under the roof. The situation The...