Welsh loft!!!!!!!!!!!

[lymmranger]

OK since retiring the missus fancied moving to the coast.....

managed to sell and successfully offer on a new house..........

We have realised that almost all Welsh houses very rarely have roofing felt under the tiles(amongst many other problems ) the house we have bought certainly does not

We need storage "up in the loft" and I want a hobby room up there too!

Not moved in yet so following info is approximate and to be confirmed....

Ok so roof has clay marley type tiles tiles with what looks like a lime mortar mix smeared from underneath. Roof is NOT leaking! (that I can see) but is dropping a continuous shower of white lime mortar bits everywhere.

My understanding is that I should install a modern breathable fabric from underneath, starting at the top and overlapping at least a 100mm as I work down...... - am I correct???? Is there any particular "brand" to choose or avoid??? (its bloody expensive stuff )

If so how do I get right to the eaves so that any drips go into the gutter? is there a method??? (bare in mind barge boards and soffits also require attention!

How close to the tiles can I install the membrane? ....should I ensure a 50mm gap is maintained? does it matter as its a breathable fabric?

Once installed how "protective" (moisture ingress wise) will this fabric be?

....I ask that because a new roof will have to wait a few years

Finally I intend to reinforce the joists, I suspect that I will need to measure more accurately once we move in, so will come back again on this point....

Can I stress that this loft is for storage and my model railway only!!!!!!!!!!!!

But I want to make it as right as I can

 

[freddiemercurystwin]

Your membrane (cheapest will be ebay) fixes (with staples or similar) to the underside of the rafters. Because it fits to the underside it is impracticable to try to drain any drips that may get through the tiles into the gutter.

Because you fit it to the underside of your joist this eliminates your questions regarding getting a gap between the membrane and the tiles.

 

[lymmranger]

Your membrane (cheapest will be ebay) fixes (with staples or similar) to the underside of the rafters. Because it fits to the underside it is impracticable to try to drain any drips that may get through the tiles into the gutter.

Because you fit it to the underside of your joist this eliminates your questions regarding getting a gap between the membrane and the tiles.

Cheers Freddy you confirm my "musings"

I (ideally wish to "add" some insulation to the rafters............

I assumed a 50mm gap was a good idea and that would allow 50mm of PU insulation.........

 

[catlad]

It would make more sense I think to fit the insulation and then ply the underside of the rafters.

 

[lymmranger]

It would make more sense I think to fit the insulation and then ply the underside of the rafters.

It would I agree, but

within days of moving in I need the storage (says the boss), so membrane first to stop the dust, then clean out the old insulation, put in some bigger joists (9x3 probably) then insulate and lay floor.............

should be done in an hour or so

 

[lymmranger]

Blimey - may be a resident within 3 weeks

So next question..........

How or what is the best method of fixing my uprated joists into the brick party wall which is currently "filled" with chimney breasts - which are in use with multi fuel fires?

Do I hope current inadequate joists have a wall plate I can add to???

do I "insert" a joist hanger into the mortar course?

...........Please help someone who is trying NOT to panic