roof felt under tiles

[minimutly]

Still don't see how a tear/hole in the felt changes how ater runs onto the sofits, I think that's a different (but real) issue - unless - you're saying the water moves from the outside of the felt onto the inside/underside, tracks all the way down to the sofit?

Like the look of those drip strips - is there a name for them, could do with some on my front roof?

 

[brightspark]

Still don't see how a tear/hole in the felt changes how ater runs onto the sofits, I think that's a different (but real) issue - unless - you're saying the water moves from the outside of the felt onto the inside/underside, tracks all the way down to the sofit?

Like the look of those drip strips - is there a name for them, could do with some on my front roof?

whats your need for them if your felts ok nuff said

 

[dholdi]

I'm pretty sure felt trays were introduced when it became obvious that the exposed felt was being degraded by UV.
The trays are uv stable and as the felt to tray transition takes place below the slate / tile their use prevents felt degradation and hence soffit / eaves rot as a consequence.

 

[minimutly]

whats your need for them if your felts ok nuff said

Nuff said? I asked a simple question because I didn't follow your reasoning, don't recall mentioning the state of "my"felt...

 

[gaz1]

I'm pretty sure felt trays were introduced when it became obvious that the exposed felt was being degraded by UV.
The trays are uv stable and as the felt to tray transition takes place below the slate / tile their use prevents felt degradation and hence soffit / eaves rot as a consequence.

nope the true reason why soffits and eaves rot is us and our heating ways

the wood of nowadays is not as dry as what it was years ago
ontop of that we have installed central heating and air heaters the issue is we have created a wet moist air within our loft areas that are then rotting our wood work at the top of the house

plaster seals the ceilings so no way else for the water to really go

this is the true reason why a cold roof method must be used in your loft area mainly to stop the moist air

 

[heldtogetherwithblutack]

for a minor repair, a good 4" rip, I used this method on old hessian tar felt, 10+ years and still nothing untoward.
"Gently" wipe repair area with either petrol, paraffin or any old solvent on an old tea towel to remove dust and cobwebs.
Roof and gutter sealant, the type that stays flexible and sticks like "the proverbial" to a blanket spread thinly over the cleaned area with a body filler spreader then work in some plasterers scrim tape for reinforcing and holding it all together. It took absolutely ages to keep it all in place and stay in position until it had gone off enough to be self supporting, a week or so later, a good covering over the whole area.
If I had to do it again, yes, given the alternatives, however, with modern day adhesives I'd probably try a flashband patch first.
snipped from Bostik:
Does Flashband stick to felt?
Bostik Flashband Self Adhesive Flashing Tape for Roofs is a flexible bitumen strip that bonds instantly to most building materials to provide a permanent, watertight seal. Flashband has four layers of protection, meaning it's both tear and impact resistant and can withstand extreme temperatures of up to 100oC.

 

[minimutly]

for a minor repair, a good 4" rip, I used this method on old hessian tar felt, 10+ years and still nothing untoward.
"Gently" wipe repair area with either petrol, paraffin or any old solvent on an old tea towel to remove dust and cobwebs.
Roof and gutter sealant, the type that stays flexible and sticks like "the proverbial" to a blanket spread thinly over the cleaned area with a body filler spreader then work in some plasterers scrim tape for reinforcing and holding it all together. It took absolutely ages to keep it all in place and stay in position until it had gone off enough to be self supporting, a week or so later, a good covering over the whole area.
If I had to do it again, yes, given the alternatives, however, with modern day adhesives I'd probably try a flashband patch first.
snipped from Bostik:
Does Flashband stick to felt?
Bostik Flashband Self Adhesive Flashing Tape for Roofs is a flexible bitumen strip that bonds instantly to most building materials to provide a permanent, watertight seal. Flashband has four layers of protection, meaning it's both tear and impact resistant and can withstand extreme temperatures of up to 100oC.

Plus one for the flashband.

 

[bricol]

Stick a bucket under it - next year sometime check it. Then throw the bucket . .

At least that's my experience of tears in the ancient felt under my tiles - no leaks. Only leaks I had were in the valleys between pitches from failed seams in the lead and the chimney flashing.

 

[brightspark]

flashband = cowboys a cheap quick bodge instead of using lead

 

[roofman]

nope the true reason why soffits and eaves rot is us and our heating ways

the wood of nowadays is not as dry as what it was years ago
ontop of that we have installed central heating and air heaters the issue is we have created a wet moist air within our loft areas that are then rotting our wood work at the top of the house

plaster seals the ceilings so no way else for the water to really go

this is the true reason why a cold roof method must be used in your loft area mainly to stop the moist air

I get educated daily on this Forum...The reason the old 1F type felt rots on the 1st course is because it was a hessian based felt and the felt sucked up moisture from the gutter plus just being exposed to 40+ years of air on tiles with no eave fillers also worked its magic. There was also no treated and graded (colour coded for less knots) battens like there is today and this took its toll on the first couple of courses and a foot in from the verge which brought its own problems being mortar based and after 40+ years being damp rotted the verge ends. Any roof that has the old 1F type bitumen underfelt does not suffer from condensation problems as there are to many drafty holes everywhere..same thing for the 9x6 clay or concrete tiles with no underfelt but laths and lime mortar instead as they are drafty too to be able to sweat, Same rules for slate with no felt only mortar on the underside.

 

[eLuSiVeMiTe]

flashband = cowboys a cheap quick bodge instead of using lead

I'm waiting for pictures of a felt repair done with lead.

 

[brightspark]

I'm waiting for pictures of a felt repair done with lead.

if the felt needs a repair its cream crackered and I would do the job properly not bodged

 

[roofman]

The felt is only a vapor barrier but unlike these days its job was to barrier from the outside and not the inside from warm air hitting cold..old 1f felt should not be used to keep leaks out as if that's the case then you have issues from the roof/chimney/ridge areas and you need guys like me to come and take loads of money off you

 

[brightspark]

I re roofed my house using fellex breathable sarking felt not cheap but good .then re slated it using original slates along with 300 quality second hand ones to match that was 30 years ago

 

[roofman]

Anyway i come here to escape roofs not discuss them so ime out