Adhoc Torch on Felt

Question

I had a roofer inspect a flat roof a couple of months ago, who then made some patch repairs using torch on felt. Another roofer cam to quote for a replacement roof today and said the felt hadn't been torched on properly and water had got underneath the add on section. The felt could be lifted up without much effort and some of the edges on the felt underneath seemed to be peeling away. He then recommended I remove all of the add on felt as this was far worse than just having the felt below it.

First of all, how bad of a job is this and secondly, is this likely to have caused any major damage in two months given we've been having a lot of rain?

I appreciate any answers and you taking the time to respond.

Sean · Accepted Answer

If those patches were torched on to mineral felt, what the installer didn’t do, was to use a bitumen primer. This would have allowed the felt to adhere properly. It probably didn’t make much difference over that period to the state of the roof, if it already needed repairs. In all honesty, felt is old hat now and there are much better flat roofing options, such as rubber and GRP.

Thomas · Answer

I'd say sounds like he's torched it on whilst it's been damp with no primer, see poor torch on jobs all the time. You won't know about any further damage without stripping off, if no water marks in side is say at worst needs new boards

John · Answer

Sounds like whoever did this didn’t dry the given area properly so the bitumen didn’t adhere to existing surface ! I wouldn’t of thought the patching would of created any damage if the flat roofer only covered, if he tried to remove any lumps in felt with a spade then that would be a different story as he would be removing several layers to achieve a flat area

Edward · Answer

The simple answer is until the roof is lifted you won’t know! Water seeks the path of least resistance so if there was no seal and it did find its way through it’d come down to at what rate it happened.

Michael · Answer

Hi , any repairs that have been done incorrectly will not not effect the original water ingress what damage is done is done and will continue , I feel you may have chosen the wrong person for the job , will have to be surveyed properly and the correct works to be carried out.

Sammy · Answer

Pull it up and re do it for sure as for damage Aslong ast dried out before new boards go down it should be fine I wouldn’t worry too much about it but get it replaced asap

James · Answer

If the water was penetrating then yes there’s a good chance there’s some damage due the the roofer not laying the felt properly I’d suggest getting it taken up and replacing all the felt as patch work is only a temporary solution

Adhoc Torch on Felt

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