How to repair roofing membrane

[trullock]

I recently had some work done in the loft and the workmen managed to burn a hole through the membrane under the tiles, and scorch another area.

What is the appropriate fix for this?

They've agreed to "do something" about it, but I'd be grateful of your insights to ensure its fixed properly.

Thanks

 

[Tigercubrider]

How the hell did you do that?

The membrane works by allowing water that gets past the tiles to stay on the tile side surface of the membrane, while allowing air to ventilate.
So you need to make a T shaped patch with the vertical poking through the hole, and the cross bar inside the loft.
You could use some double sided tape to hold it together and maybe a couple of stitches as fixings? Staples?

 

[^woody^]

Hot flame in a loft? Yeah they seem to know what they are doing, which would make me question any repair they plan to do unless the "doing something about it" is patching in a new section of membrane from the roof side.

 

[trullock]

It happened soldering joints in the pipes visible just below the offending areas.

The hole is right next to a roofing lath, meaning a fix could be very involved?

Obviously I'm annoyed this has happened, how much of a problem is it? I'm sure the company will try and get out of it, whats an acceptible level of repair vs the risk of the hole existing?

 

[^woody^]

whats an acceptible level of repair vs the risk of the hole existing?

Read the post above

 

[trullock]

@^woody^ Well, that would be my unprofessional opinion too. Whats a likely cost for a pro to do that, a few hundred quid?

 

[^woody^]

It shouldn't matter to you.

Someone has damaged your property, so they should put it back into the state it was in before the damage. That membrane would be expected to last in excess of 60 years.

Now if you damaged it yourself, you may accept an inferior repair, a temporary patch that will become a permanent patch if it lasts.

You would not accept a patch from the firm who damaged it, as in a few years if the patch fails the firm is no longer to be found or not interested.

Either the firm rectifies it or you get a quote from others and they pay for it. What the cost is, is of no concern to you.

 

[Exedon]

That's just plain clumsy as above needs reinstating to original condition.
As an aside there is absolutely no need for any plumber/heating engineer to be doing hot work in lofts (or anywhere else)
When using copper we shifted to press fittings some years ago. Quick neat no flame!