Bonding gutter issue?

17 Feb 2020
Reaction score
United Kingdom
Hi everyone,
I purchased a semi-detached which has come with a few issues. My house has a tiled roof and next door is slate, after a few months of being in the house we noticed a slight leak in the roof where the two houses meet in the loft, turned out they failed to install a bonding gutter when they done the roof. We got someone out to do the work and install a bonding gutter, once this was done I had some worries that I could see day light out between the tiles from within my loft still which I queried the guy who done the work about. He wasn’t too pleased with me questioning his work and after some heated discussion said oh yea the roofing underlay wasn’t long enough to go right over, but aslong as no water gets in what’s the issue?

It’s been a few months later and from what I’ve noticed no water has got in through the gaps so I’ve not really thought anything of it until now... we had a loft insulation company out to quote some work and he’s saying the roof shouldn’t be so draughty like that so once again I’m doubting the roofers job.

The pictures show the gaps between the tiles and the underlay.

Any suggestions?


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