Search results

Hi all I've had to change the plans regarding my roof. The reason for this is to do with the total height being more than 3m I now have to put the insulation in between the joists. Originally the foil backed plasterboard was going to sit underneath the joists and then a gap between the...

Thank you for the info. Regarding the Insofast, you'll see that I've started a separate thread trying to find out the difference between the two. Regarding the EDPM, I will indeed be having a 12mm external plywood on top of the TD4126. There is still a part of me that thinks I should...

I don't understand that. Can you please explain. Surely if the Insofast has to go from the top of the external plywood all the way through to the joists then it must go through the VCL.

Hi all On the Celotex website they advise to use the Suretwist Composite Panel helical fasteners and not the Insofast as recommended buy someone else on this site. Can someone tell me the difference between the two. The Suretwist seem to be a fair amount cheaper than the insofast. If...

Will do. Thank you

Hi all Sorry or butting in on your thread but I'm now at the stage when it is time for me to decide what to do regarding the roof insulation. For background purposes, I am having a 6m x 6m single story extension. The joists will be 9"x3" The firings will be 140mm down to 1mm which is a...

Yes, I did indeed mean 120 and not 12 LOL. Typo. My bad. Thank you for your advice. I believe the correct insulation to get would be the Celotex TD4126 This has the foil on one side (which I believe is the vapour control) and ply on the other side which the EDPM rubber roof will sit on the...

Hi all I'm so so confused as to which insulation I should be buying. I'm not concerned about the make. It will most likely be either Celotex or Recticel. My problem is what type do I need??? The plans state the following......... To achieve a U value 0.18 W/m2K Flat roof to be single...

Thank you all for your advice. I imagine you do get what you pay for then!!

Hi all I am at the floor insulation stage now of my extension. I would like peoples opinions regarding the difference between Celotex GA4075 and Jabfloor 70 EPS (75mm of course). Jabfloor seems to be a fair bit cheaper than celotex but I don't want to make a choice limited to the cost...

Thank you. It isn't going to be the finished floor. There will be a screed on top of it. The plans show that I need 100mm of ST2 which I believe is 1:3:6 I'm only going by what the plans state. Are the plans wrong???

With the figure of 3.6 cubic metres, can someone give me an idea as to how many tonnes of ballast and cement I will need (If I can use only ballast and cement). Adrian

Sorry 150mm!!! I'm a moron sometimes!!! Actually, it needs to be 100mm Although I've worked it out to be 4 cubic metres I'm not sure how much ballast and cement I'd need.

Hi all I need an ST2 concrete mix for my floor. I believe this is a 1:3:6 ratio (please correct me if I'm wrong). If I want to use just cement, ballast and water 1) Can I do that? 2) What would the ratio be? As a point of interest, I need to fill an area which is 6m x 6m x 150cm...

I'll be honest. I've no idea what is in the liquid. All I can tell you is that it is from the following website. http://www.expressscreed.co.uk/ (I am NOT advertising this company whatsoever). Maybe you can tell from the site without me having to phone them to ask. My gut feeling was...

Hi all Although I'm not at the screeding stage yet I am looking into it to be ready. Firstly, I am getting underfloor heating (wet version) so this might make a difference to peoples opinions. Secondly, the room is going to be 40 square meters. Thirdly the screeding has to be 65mm...

The problem with only posting certain information is that people who reply to my questions don't know the full story. This is my fault BUT in my defense I sometimes don't realise what info you need. The roof is going to be a warm flat roof. I'd like to post the plans on here but I've no idea how.

Sorry, that's what I meant. From the centre of the joist to the centre of the next joist. Sorry for not explaining myself very well. Regarding the firrings, it would not be 6.5m only 6m The joists will be going along the width of the house (which is 6.5m). The firrings will be going from...

The length of the timber is 6.5m This is the width of the extension. I double checked with the architect. The timber will be 75 x 220mm C16 roof joists at 400cc From what I can tell, that means that the gap between each joist will be 400mm from the centre of each joist. 100x50mm wall plate...

Hi all I am building an extension and the width of my extension is 6.5m (the width of my house). The length will be 6m. The joists will be going width ways (6.5m long). My plans state I must have a drop which is at least 1 in 80. So, by my calculation I need a drop of 75mm (1/80*6*1000)...