the new thinking in germany is to insulate the loft between the spars under the felt and then covering it all some hi tech plastic sheeting hermetically sealing the inside of the roof so no warm air from the house comes into contact with the cold tiles thus eliminating the cause of condensation, its expensive but it works
being a builder i can tell you that the main cause of condensation forming is not so much warm air getting into the loft but poor air circulation in the loft space , make sure that the loft insulation is not blocking any airways and you could also fit soffit vents and tile/slate vents
Thanks for the reply & info. Last year the specialist contractors carried out air flow test and they seemed to think the stored stuff was affecting the airflow across the inside of the roof. We saw big reduction after the loft was cleared out. Nothing has been moved or altered in the loft since last year so am assuming the hatch is the reason as eaves and soffit vents are clear. The condensation is quite small area compared to this time last year. Seems to be a popular subject.
@TK42138 yes having a clear out would certainly help , also you say that there is recurring damp in a certain spot [i think you said above the hatch ?] and i see in your vid that in places the underfelt is ripped , it would be worth checking to see if you have a damaged or cracked tile in that area above the felt that is allowing water in
The builders checked the roof but there was no loose or damaged tiles or ridge tiles. That was the first thing I considered when I phoned the insurers up. I'll give the eaves another inspection from inside the loft just in case some insulation has dislodged or something.
the new thinking in germany is to insulate the loft between the spars under the felt and then covering it all some hi tech plastic sheeting hermetically sealing the inside of the roof so no warm air from the house comes into contact with the cold tiles thus eliminating the cause of condensation, its expensive but it works
garryentropy 7 months ago
being a builder i can tell you that the main cause of condensation forming is not so much warm air getting into the loft but poor air circulation in the loft space , make sure that the loft insulation is not blocking any airways and you could also fit soffit vents and tile/slate vents
G22PRODUCTIONS 1 year ago
@G22PRODUCTIONS
Thanks for the reply & info. Last year the specialist contractors carried out air flow test and they seemed to think the stored stuff was affecting the airflow across the inside of the roof. We saw big reduction after the loft was cleared out. Nothing has been moved or altered in the loft since last year so am assuming the hatch is the reason as eaves and soffit vents are clear. The condensation is quite small area compared to this time last year. Seems to be a popular subject.
TK42138 1 year ago
@TK42138 yes having a clear out would certainly help , also you say that there is recurring damp in a certain spot [i think you said above the hatch ?] and i see in your vid that in places the underfelt is ripped , it would be worth checking to see if you have a damaged or cracked tile in that area above the felt that is allowing water in
G22PRODUCTIONS 1 year ago
@G22PRODUCTIONS
The builders checked the roof but there was no loose or damaged tiles or ridge tiles. That was the first thing I considered when I phoned the insurers up. I'll give the eaves another inspection from inside the loft just in case some insulation has dislodged or something.
TK42138 1 year ago