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Hi tpt I have (hopefully) attached some photos. I have tried to capture the shiny parts too, the staining definately seems to be on the top as you can almost see where the sand has been brushed in I.e only certain high spots of the stone are darker giving it a mottled appearance (The...

Hi all, I might be on the wrong thread here but want to see if there's anyone out there that can advise. We have recently laid some mid/light grey limestone flagstones and used Cementone Wide Jointing Compund to grout inbetween. All great so far and the finished look is just what we...

Hi, We are currently at the insulation stage of our two storey extension (doing it ourselves) and just want a bid of advice/clarification before I go ahead a get it all wrong! Am I along the right lines installing the below? Roof PIR in-between rafters: cut the boards slightly smaller...

We have just built a new chimney on our extension with 150mm pumice flue liner running up the inside with leca insulation. My question is - does it matter what size chimney pot you put on the top? i.e. diameter? We have been given a standard roll top pot with 265mm internal diameter and...

Hi Looking into getting some insulated plasterboard (need Celotex GD5040 to get my uvalue) but can only seem to get in packs of 22. I need only 9 sheets so would prefer to not pay the extra, is it possible to literally used 40mm celotex and fix plasterboard over the top or am i missing...

Hi theoldun I used the online calculator on Celotex's website, putting all the info for our walls and the only difference using the plasmor blocks were 0.1 uvalue ( but they are £250 cheaper) We have bricks outer, 50mm air gap, 70mm celotex, blocks, dot dab, plasterboard.

Haha nuff said! I'll go with the cheaper option... Thanks guys!

We will soon be ordering our blocks for our extension. Spec says Thermalite Shield (to give overall uvalue of 0.20) and the building merchant has suggested the cheaper Plasmor Fibolite (giving overall value of 0.21) Overall the Thermalites are £250 more expensive than the Fibolites, what I’m...

We are due to build a new chimney on our new extenision in the next month. We will be buying the Isokern Pumice flue liner (not the DM system) but I am wondering what size to buy. We will be having a stove with a 150mm flue but there doesn't seem to be any guidance on the flue liner diameter...

Thanks for your replies guys - are the distances you've quoted going to a fake beam (i.e. a concrete lintel with a food fascia) or an actual wooden beam acting as a lintel. We would like to the latter if possible!!

Hi We are soon to build a two storey extension at the rear of house which will incorporate a new chimney and fireplace. I am currently trying to design my fireplace and I want to have a wood beam across the opening. Does anyone know what the rules are regarding distances from the fire that...

Cheers again for all your help Oldun, I will get pricing up for this. Just so I am clear, are you saying: roof tiles - battens - rafters - permeable roof felt - 165m celtox inbetween rafters - foil - 12.5 foil backed plasterboard? I am assuming I only need to plasterboard the sloping...

Ah apologies... I should have realised that it would affect the spec. It says on the spec that the rafters are to be 175x50mm at 400mm centres. The width of the roof is 5700 Pitch is 49 degrees Wall plate height it 3650 from DPC to soffit 2300 from 1st floor to ceiling, total of 4750...

That really is so helpful, cheers! Will take that information tonight and do some sums. Yes the roof will be off the existing roof so interesting about warm deck, we shall change to cold deck with breathable membrane. Purely out of interest - why always insulation over the concrete...

Hi tony1851 The extension consists of one large room downstairs with three windows (1200x1200) to provide a uvalue of 1.6W/M2k each Upstairs consists on spare room with dormer window (1200x1200) Master bedroom with dormer window (1200x1200 ) and normal window (750x1000), ensuite with...

Hi Theoldun, thanks for your reply I really do appreciate your help and feedback on this, spent most of the weekend trying to work out alternatives for the uvalues and my brain is now fried. The extension is two-storey which comes off the rear of the existing cottage with a pitched roof...

That does StevieV1 thanks. I assume you mean something like this: http://www.runnymede.gov.uk/portal/site/buildingcontrol/General_guidance_notes/ http://www.sedgemoor.gov.uk/index.aspx?articleid=6304 Was reading it last night and it was very easy to understand. My only concern is...

Hi tony1815 Just so I interpret this correctly, does that mean that say our spec says 0.19 for the roof insulation but the minimum standard is 0.22 (just for example) then when we come to do it we could actually do te minimum amount required, using whichever brand at a depth that is suitable...

Steviev1 thanks for your reply - I will definately go and check them out, thanks. Can I ask - were those sizes given to you on your spec sheet from the architect or did you decide those based on the uvalues you needed? The reason I ask is that if building control pass the plans that have...