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Thanks for your replies But isn’t there insulation that is more compact that has better u value rating.?? Therefore 75mm of it would equal your standard 100mm cellotex rating. This is the specific question I’m asking ?

House renovation with new extension New Floor / oversight on new extended room Replacement floor on existing part of house , with new oversight /membrane. Floor being hacked up Underfloor heating within new screed on all ground floor on one level Assuming Finished floor levels are correct and...

~Vaulted kitchen asymmetric roof single storey extension ~Block work with cavity supporting Catnic type RSJ ~Bespoke glazing (2 x triangular) on RSJ ~Sliding doors under RSJ ~Ali cladding C section over external of RSJ My concern pre door/glazing install is the detail on the RSJ with the...

This flange though this needs to stick to the EPDM?

I have a "classic bond' once piece EPDM roof I need to install an Ubbink extract ventilator through the roof. The base of this ventilator kit has a EPDM flange- Looks as if is supposed to be heat welded Can I seal / fix this any other way on the existing EPDM without using heat??

Thanks to all that have responded. Useful information. An electrician will be consulted and on board , was just trying to evaluate things with groundwork etc really, ahead of the game. I'll get a design size/calc done as advised

HI what size & type of cable is required if putting sub mains to an annexe & a garage . The main house is on external meter box Garage & annexe to have their own supply and consumer unit fed back from just before the house internal consumer unit (so all metered from main meter) Not sure what...

Thanks guys really appreciate your advice so promptly too

Fair play re plug - just trying simplify the 1st fix really to avoid a surface box could I run from the 32a dp switch : 1x 6mm to single outlet plate for hob 1 x 2.5mm to a socket for oven to plug into

so can I cut the plug off and connect into the plate with the oven ?

Small kitchen in a self contained detached annexe Best way of connecting / cable sizing for an Oven & Induction 2 zone hob Oven has plug on it and 2.2kw Hob is rated at 2.8kw. Is it best to run a 6mm to a single 32a dp switch , then a combined outlet plate behind oven or is this overkill ?

So if timber kerbs are already built what flashing do I need to buy though?? Im obviously trying to avoid going above the 150mm (build regs) upstand height

We have a 15 degree pitched warm roof with Sarnafil. It has 2 standard GGU MK06 Velux windows. WHAT IS THE CORRECT FLASHING ??? Or Correct flashing method?? My carpenter has built the kerbs ready, to which the Sarnafil fitters have covered right over the top I'm tired of going between Velux...

Apologies , for confusing things. I will put celotex between timbers, before plasterboard i believe i have to put a vapour barrier or foil backed plasterboard. Im trying to avoid the cold bridging on timbers. I thought multi foil was ok as long as you had air gap one side. Therefore i thought...

Timber Frame annexe has cladding, battens, breather membrane, OSB, then 150mm timber frame wall Inside: celotex between studs Then what's my best option as regards insulating, vapour barrier , service voids etc A multi foil insulting vapor barrier seems a good idea ??? If constructing...

vapour

Thanks Guys, Yes there a dpm under the new concrete slab (2 yrs old) but the laps cut off, but i guess if i do above its bolt n braces

Yes I'm aware of what should have been done, BUT as it is now , can i rectify by adding additional polythene under the celotex too ?????? Im just concerned if that would have any affect. I intend to put insulation around the perimeter 'skirting board style' to combat bridging see modified...

I have a timber frame structure mounted on concrete blocks around the perimeter, which are bedded on a concrete base.The concrete base has a membrane but is cut off flush. as i'm doing a solid floor inc Ufh made up of 150mm celotex , a seperation layer then UFH stapled on top , before a 75mm...