scottishjohn

my guess is YES as its already been extended got to be worth a conversation with planning before you do anything

why not tank the inside?

slates look very old and fragile# exect some to break if they come back and do it as suggested maybe thats why they did it that way to save you the expense who knows how far back they would have to go once they start removing slates ? couldd maybe end pu with a complete reslate there are cerainly adhesives that could be used under the lead ,once you clean the slates that would work

air fryer

I have Samsung at new house-- 16kw unit and depending on how hard it works it is near silent to acceptably loud as its outside

thanks for the replies

what cleaning products and soap powders are ok with a treament plant so as not to kill the bacteria anybody that has used for for some time --what are you using ?

you only show one baton far better to use cross batons ,then there is no ledge for moisture or crap to build up on over the years single batons with osb sheeting caused my house to rot as all winter the dust etc were damp ,,so 25 years on i had a problem on the north side of the roof the extra cost of double batons is very small and also gives you a bigger gap

or below them change the Pb for insulated PB and loose maybe 35mm in head room,and you got a warm roof as it already has insulation above and only rafters are not insulated,but to be fair wood is a pretty good insulator

It is not really a cold roof that is where all the occupied space is insulated from all of the loft and roof --eg flat ceilings I am guessing as it has pB then it is occupieed below the insulated roof section I would call that a wram roof so back to your question I do not see any need to slit it as there will always be low pressure on one side of the house due to winds ,heating of roof etc etc so it should cause enough of a draft to pull from one side to the other,just make sure there are no cold bits where the eaves meets the walls

I may be being thick but why would you have ,as you say a gap if you have filled space between rafters with insulation ,the osb can be hard aghianst it both sides the eaves gap is to vent the cavity walls to exterior ? I am confused is this a cold or a warm roof system a drawing please

so basically a warm roof as if it was sips panels so there should be little or no moisture inside it and making holes wil surely induce a warm flow of air where moisture can condense from heat inside house If i understand you correctly ? like it has vaulted ceilings as in a room like a loft which is heated from house?

what is a cassette roof

vented dry ridge system ? then it can come out at the tiop which is where the heat generated between tiles and mebrane will wnat the air to go

If you make new stud walls just wrap the membrane around edges of panels before you fit them -then you have a complete seal ,by the time they are screwed together