Paul Alan

No it was a full plans submission, they even came out this week to "check" the insulation pre plaster. Neither the joiner nor BC ever once mentioned anything about a vapour control layer to us. Im picking up some foil tec double today which is a vapour control layer and is also insulative to equivelant of 65mm mineral wool, ive got some white vinegar to clean the roof too so hopefully we should be in a better position going forward, probably still not ideal but an improvement. Thank you for all your input and advice.

Ive just pulled back a cavity closer and its 50mm hes used, still 50 percent less. The thing that gets me is BC knew about it and yet no one mentioned it to us. The brickie simply told us that we'll need to add extra insulation in the roof, he never said why.

What you're saying makes perfect sense. Ive just read the building spec from the architect and it clearly states 100mm ful cavity insualtion, the brickie only used 25mm. I cant help feeling "unhappy" with him and myself for not checking, you jst assume its going to be done right. Especialy when you're paying LABC to oversee the works. The walls are brick and block with a little insulation board flapping around in between.

The joiner and the BCO didnt consult me over the decision. The joiner was only employed to do the roof, Ive done eveything else myself including fire doors and frames. I took the time to make sure all my partitions were square and level, all my door frames are mm perfect. At the time we employed him I was not confident to diy it, looking back now I wish I would have done it myself. When you pay a pro to do something for you its because you expect it done much better than you could do yourself, I can see thats not always the case as when putting the insulation and floorboards upstairs the joist are all over the place, the roof trusses are far from 600 centers. I was seriously considering doing the brickwork myself but in the end I thought a brickie would do a much better job, seeing how " wavy the walls are Im not so sure now.

I know.. the plans drawn up by the architect do specify a warm deck, but I can remember the BCO talking with the joiner and coming up with a cold deck construction. Yes, the xmas tree is there as last xmas there was only footings there and we didnt have room in the house for one. We was hoping to be done this xmas but not so. Were doing the lions share ourselves so its taking a while, that and money,,,

Hi. This is the rear extension of our traditional home, weve also gone 2 story to the side. There are vents on the front and to both sides in the soffits. It joins onto the kitchen, it used to be a conservatory which open plan into the kitchen, I put a temorary partition and door. The door into the house is open a lot and the kitchen has always been without an extractor fan so I can see now that we have been creating this problem ourselves., I do plan to put one in soon. Many thanks

The wall is 6 meters and the span is 3.2 meters. We live near the coast and normally get lots of wind, none for the last couple of weeks though. With all the cold lately weve had the windows and doors shut and any moist air from the kitchen has been travelling into the extension. Im going to buy some white viniger and clean away the mold then re-seal the roof. I might even buy some plastic sheet and seal the ceiling from inside, or would plenty of foil tape suffice? I'll call the spark tomorrow and enquire about alternative lighting solutions to get around the gaps for the spotlights Many thanks

I have also just seen that the joiner who did the roof has put in noggins betweeen the joist that are 175mm, I think this may be breaching the required 50mm air gap needed above the insulation in between the joist. The battens he has used are only 20mm leaving only 20mm for cross ventilation, does that seem ok? Should I take out the noggins and cut them down to 100mm? Many thanks

The wiring has already been installed, and the BC officer has specified 150mm insulation to meet the U value, this is because the bricky did not put enough insulation in the walls so we need to make up for it by adding more to the roof, the BCO has also specified that we add an extra 25mm insulated plasterboard to the roof too. We have since decided to put the 25mm insulated plasterboard to the walls as we want the extra warmth.

The board hanging down is where I have just pulled it out to look, its much worse on the left side of the room and no mold on the opposite side

No plaster board is due soon, we have been waiting for more funds since the roof went in so its been like this for months. I noticed it tonight as Im going around finishing off the insulation, and wanted to bridge above the gaps that I created for the lights with 50mm board. Ill go take more pics Many thanks

Hi I have just noticed that there is condensation accompanied by mold in the flat cold deck roof we had built in the begining of this summer. We have insulated the roof with board, its 75mm thick, the joists are 175mm thick leaving 100mm air gap. Above the joists is a furring and on top of that is a 20mm battern giving corss ventilation. Its been freezing cold here in NorthWales for the last week so I suppose we can expect some condensation but this seems excessive to me and the mold is very concerning. We have wiring for 6 spotlights in the roof which 6x3m in size, the sparks asked me to cut a 150mm wide gap in the insulation board for the spotlights to vent heat, the mold is mainly in the recesses for the spotlights. Not sure what to do about this? Im going to clean the mold off with soapy water for now, and fill the gaps for the spotlights above the 75mm insulation with 50mm insulation so to leave a good air gap in them parts. Is there something wrong with the design of the roof? Do we need to make alterations? Many thanks Paul Edited just now by Paul Alan