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Bloke Doing Roofing Treatment

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Tilly2 | 08:22 Tue 12th Apr 2016 | Home & Garden
26 Answers
Yesterday, a house across the way from us had a group of men cleaning the moss of the roof.

None of them were wearing any sort of safety equipment. The bloke on the roof, who was doing the washing with a power tool was just perched on the ladder which was laid on the roof. He had no harness on, nor a hard hat. I was on pins all day. Fortunately, he came to no harm but there were times when it all seemed very dangerous.

Surely, he should have had some sort of safety equipment? What do you think?
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With regard to your question is it necessary to have the moss washed of the roof?
This seem to be the advice
It is only in circumstances where these growths are interfering with the free drainage of rainwater off the roof slope should there be any cause for concern. In these circumstances it may be necessary to clean the roof tiles using a suitable, regulated biocide and a wire brush, or a low pressure wash.

Roofing experts warn that roof tiles should not be subjected to high-pressure washing or jet washing for many reasons which include:
Removal of Lichen and moss by jet washing will invariably remove the granular surface finish and potentially damage the structural integrity of the tile, this process followed by a surface treatment application would invariably invalidate any tile manufacturer’s guarantee.
Interlocking roof tiles are not designed to be walked upon, foot traffic can cause these interlocks to break opening the roof up to water ingress.
Inappropriate pressure washing can potentially force water up between the tiles and roofing felt into the roof space. Bedded mortar and flashings can also be blasted off sing this method, potentially leading to further costs for rectification.
If you're having any roofing work done make sure that they are insured. I've heard stories of people who employed 'travellers' to work on a roof, someone's had an accident and have claimed from the householder.
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Thanks for that NS.

As I said, at least six tiles have been dislodged. No sign of the gang today, as yet.
I don't somehow think they will be back
I thought it was illegal nowadays to work on a roof with erecting scaffolding .....
In a factory where I once worked, the works safety officer fell off a ladder and broke his leg. He was putting up a safety notice at the time it was about 'Safe use of Ladders'

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