Code 5 lead flashings for roof valley

[nhazlett]

Hi, I have an assignment I need to do and one of the topics is Code 5 lead flashings for roof valley, I was wondering if anyone has any information to do with repair, maintenance and typical defects of it.

Any information would be much appreciated
Nick

 

[SurreyRoofingEstimator]

A lead valley laid in the porper fashion should last the life of the rest of the roof at least

Defects usually occur if it has been laid in too long a length thus splitting through expenasion and contraction (or a nail has been put through it)

 

[nhazlett]

thanks for the reply.
when it says code 5, is that a thickness of the lead used

 

[SurreyRoofingEstimator]

Yes sort of, code 5 refers to the wight of the lead being 5 pounds per square foot so is thicker of course that code 4 but thinner than code 6, metrc weights are as follows.

Code 3 = 15 kg per square metre
Code 4 = 20.41 kg per square metre
Code 5 = 25.40 kg per square metre
Code 6 = 30.1 kg per square metre

etc

 

[nhazlett]

ok, is there any way of maintaining the lead to ensure quality through-out the entire time it is used?
would it be quite simple to do it again or is that not possilbe one it has been layed?

 

[SurreyRoofingEstimator]

The only really effectve way to repair a damaged lead valley is to replace the length that has been split which of course necessitates the removal and reinstatement of the adjacent tiling. It is possible however to apply a liquid coating to an area of damaged lead to avoid the disruption (and cost) of a `proper' repair but this would be a relatively short term solution (in comparison to a new length of lead)

 

[nhazlett]

ok, one final thing is there any protective coating that could be applied to it to prevent failure?

 

[SurreyRoofingEstimator]

In short. No, the only way of ensuring quailty throughout its life is to do it properly in the first place.

 

[nhazlett]

ok, thanks a lot for your help!

 

[Xenon]

ok, one final thing is there any protective coating that could be applied to it to prevent failure?

New lead regularly coated with patination oil, will have an extended life.

 

[Roofer]

New lead regularly coated with patination oil, will have an extended life.

No it won't

Patination oil prevents any water run-off from the lead causing staining to slates etc. It does not give any protection to the lead.

 

[Xenon]

Patination oil prevents any water run-off from the lead causing staining to slates

In a valley? I wonder why the british lead mills recommend it?


Have a read

educate yourself

 

[datarebal]

One coat of Patination Oil should be applied to all Leadwork. It helps prevent white carbonate staining that may occur on newly fitted lead running onto adjacent materials and provides a pleasing finish to any leadwork

 

[Roofer]

Quote from BLM link:-

'One coat of Patination Oil should be applied to all Leadwork. It helps prevent white carbonate staining that may occur on newly fitted lead running onto adjacent materials and provides a pleasing finish to any leadwork.'

Isn't that what I said?

Nothing in there about the lead having an extended life if regularly coated

 

[Xenon]

Quote from BLM link:-

'One coat of Patination Oil should be applied to all Leadwork. It helps prevent white carbonate staining that may occur on newly fitted lead running onto adjacent materials and provides a pleasing finish to any leadwork.'

Isn't that what I said?

Ermm, no.

Patination oil prevents any water run-off from the lead causing staining to slates etc.

Thats what you said