vcl

Hello. When I look at construction details for warm flat roofs I see the VCL is placed above the joists. However for a warm pitched roof the VCL is placed below the rafters. For example see the attached image from...

Hi I'm keen to insulate a loft with unusual construction (see below). I'm hoping that can be the usual "roll out some mineral wool" to a depth of 300mm (and raise any boarding above that by at least 50mm). But am weary of condensation risks (all the more so as this is a timber frame, timber clad...

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...

Hello all! First time poster: I have a semi-detached house in a high water table area and I noticed that under the suspended wooden ground floor there was some standing water. I carried out some investigation and it appears that more water flows into the crawl space (approx 4ft high) in when...

Unfortunately we are already amidst our renovation job, which includes also the redoing of a flat roof and upgrading it to a warm roof and I have a question regarding the insulation of the fascia, I find shocking that there isn't really much material on the web about it! The new joists have been...

I have a 15m2 felt flat roof that I am replacing with Warm Roof. Should the VCL be continued up the walls at the edges (it is surrounded on 3 sides by the next storey). If so how do you attach it to the wall? 2 sides are limewash cob, one side painted brick. There will be a lead flashing set...

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...

We have built an extension and had the base built for us ~ the usual layers of hardcore, sand, DPC, rigid insulation, more DPC and poured concrete. Because we want a 'traditional' timber floor, we allowed for joists and floorboards. At last inspection BCO said we needed air-bricks to ventilate...

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...