Hi Gents,
I'm still on this. In fact was going to commence this weekend (lots of 'life' has been getting in the way since i started this thread
)
Im still going with the cross battern idea with packer 'feet' to gain height.
Issue 1:
Now i'm looking to use 22mm x100mm (haven't asked if you can get x125mm yet). I dont intend on cross battening everywhere but will require around 53m to go into the attic. Now 53m @ 100x22mm (using wood density of 0.5x10-6) equates to 1.1kg/m and thats 58.3kg of wood before i even think of putting board down. My thoughts are i certainly weigh more than 58kg, however i'm not spread over the centre of the attic which is ~28m2, and that is 2kg/m2.
Is there a rule of thumb for load per m2?
Issue 2:
I aiming to lift the floor enough for my 170mm insulation. Using the above battern dims my intention was to allow 20mm to sit down in/on the existing insulation, then 4" tall plus 1" 'feet' gives me ~125mm and then i was hoping that compressing the final 1" wouldn't matter too much. (Thus compressing 170mm into 145mm gap). However reading through i few threads i'm now worried about not having an air gap?
(The attic in general doesn't seem to currently get damp and there are the usual B&Q T&G flaoting around up there that seem to be fine)
On a side note would anyone recommend putting floor foil under the boards prior to fitting? - Just to add the insulation.
Kind regards
PS: I'll be taking photos before, during after so will lokk for opinions - just dont fancy a "You shouldn't have done that" response.