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Hi, The standard building sand we have here is Yellow, mixed 5:1 with OPC ( Blue Circle Cement from Wickes) and that is a grey color. If you made a more cement rich mortar (4:1 or 3:1) it would be a darker grey. Different cements will change the color of the mortar, Mastercrete for...

Could I do the same with kingspan type stuff as I have some 120mm stuff sitting here. Thanks.

Hi, @simonjay, Yes, the cavity closer I have is a white plastic strip with polystyrene on it, it looks as though it has some sort of plastic clip arrangement on it. I haven't really looked at it properly yet, I've only seen the end of it sticking out of the bag it came in but it didn't look...

Hi, Thanks for the replies. I asked about the cavity closer as the stuff that has been delivered doesn't look that good, it's a wide strip of plastic with a strip of polystyrene on it. The Thermalite aerated blocks are up & haven't been returned to close the cavity so it will be too much...

Hi, Could any of you knowledgeable sorts answer these questions for me please :) Cavity Closers, Do I need to use them? My inner leaf is built from Thermalite blocks with 85mm full fill dry therm insulation, can I close the cavity with a slice of Thermalite and a DPC up against the...

Thanks for your reply, I'll be fitting three 78 x 118cm windows so they have been spaced across the room width just where they need to be, it's just the height up the roof that got me thinking, at the moment they are placed central in the span (in the center of the internal rafter length...

Hi, can I ask you guys if you have a preference of where you fit a velux windows in a lean to roof that will have a vaulted ceiling. Is it just a case of centralising the velux in the center of the span or would you off set it a little, say closer to the outside wall of the lean to roof...

Hi, I forgot to mention that the ceiling of the extension is going to be vaulted so there will be 100mm of between rafter and 50mm of under rafter insulation both kingspan type, the roof will also have 3 Velux windows in it if that makes any difference. I initially thought of using sarking...

Thanks for the helpful advice :) I imagine there will be a concrete lintels in place at present, but all will be revealed soon when we open it up to see what can & can't be done. Lowering the ceiling height slightly would be ok so maybe the option of having no downstand is realistic...

Hi, I'm constructing the roof on my ongoing single story extension on the back of my house. The rafters are in place & have turned out to be at 19 degrees, this is due to window height. I believe that there's a difference between rafter pitch & tile pitch but I'm not sure how much this will...