Leaky roof.

[Bryan Williams]

Hi,hoping for a bit of advice on this..

We have built in wardrobes in the bedroom below this and the clothes have a coating of dry powdery mould,only the side under the pics ,although it is a corner outside wall.
The wardrobe is not moisture damaged at all .
This is the condition of the roof directly above.
2 ridge tiles have pointing missing but they're not directly in line with the damaged membrane, they are about 3/4 foot to the left .
The roof tiles directly above the membrane seem ok,inline,no cracks.
My first thought was rain blowing in the the ridge tile pointing gap,tracking down and finding a weak spot in the membrane ,dripping through, soaking the insulation and plasterboard, then causing a damp wardrobe..
I pulled the insulation back ,it's all dry and no damage whatsoever to the plasterboard. I'm thinking the blackened area is general dust blowing up the tiles in and down onto the insulation, the alley outside is a wind tunnel and the rain comes sideways of the Southport ccoastso maybe a bit of rain gets blown up as well as maybe tracking from the ridge tiles.
I would like to repair the membrane from inside if possible but not sure about how to go about that.
i have ladders and cat ladder so will point up the ridge tiles .
Im guessing the musty dry mould in the wardrobe is a coincidence as the area above in the loft looks bad it is not damp,im going to try a Unibond dehumidifier in it, there's no ventilation in it either which probably won't help although there is no problem my side of the room.
So mainly im asking about the possibility of a patch repair on the membrane, cheers.

 

[Cuthy246]

Not sure a membrane patch from inside would work, perhaps @gaz1 could advise. The other thing is what age is your property? that looks very much like blown asbestos insulation under the rockwool

 

[Bryan Williams]

70s bungalow

 

[Cuthy246]

Would strongly advise not to disturb the material and have it tested to determine if it is asbestos or not. Loose blown asbestos is nasty stuff, not banned as insulation material until 1986 so quite likely it is

 

[jimbo84]

Would strongly advise not to disturb the material and have it tested to determine if it is asbestos or not. Loose blown asbestos is nasty stuff, not banned as insulation material until 1986 so quite likely it is

I don’t think loose fill asbestos was commonly in use in the uk as loft insulation, although it was used. Could be cellulose or could be vermiculite (vermiculite did sometimes contain asbestos). Still, not worth taking the risk for the cost of a test. You need to know for sure, if it is it’s about the worse form of it it could be.

 

[Pigeon_Droppings2]

I renovated a 1970s house last year...first thing I did was send of samples for testing.

I included some known asbestos in the samples to make sure they were on the ball...which they were.

 

[gaz1]

its not possible to mend that patch from inside as its an outside job remove the slates and remove the latts just to get to that piece to repair it

your also at 50+ years with that felt the tear also tells me its close to end of life

its also poorly overlapped about 1-2" overlap i cant tell what tiles they are either even from a zoomed in prospect

depending on the condition of felt my advice is remove all of the tiles at that joint area
remove the latts
slot in a new piece of felt all the way along the whole roof relatt it and reslate it but this also depends on what slates you also have on your roof as well

that should last you till the end of life of the felt ( 70 years ) the new felt will cover over the lower felt a good chunk whilst the top felt will cover over the new felt resealing the whole roof again

you can tell the condition of the felt from underneath if its best to felt it or not if its a no its a full roof off refelt and relatt the whole roof