February 2022
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CERTIFICATE 12/4895<br />
the fire stopping between the adjoining properties<br />
remains uncompromised or be installed if not<br />
present. Firestopping material must be installed<br />
tightly packed and compressed under the bonding<br />
gutter and between the battens directly over the<br />
party wall.<br />
The preformed gutter linings shown in<br />
illustrations 1 and 2 can be installed directly over<br />
the tile battens. This means that, although the<br />
bonding gutter is normally installed centrally over<br />
the party wall, it does not have to be. I reiterate<br />
the advice I gave in my previous article; bonding<br />
gutters can often be the cause of disputes<br />
between neighbours, and my strong advice to<br />
anyone about to install a new roof adjoining a<br />
neighbour’s roof is to firstly talk to the neighbour<br />
to explain and agree the installation process.<br />
This is important because half of the bonding<br />
gutter will be on the neighbour’s side of the roof.<br />
If agreement is not possible, the alternative<br />
“My strong advice to<br />
anyone about to install<br />
a new roof adjoining a<br />
neighbour’s roof is to<br />
firstly talk to the<br />
neighbour to explain<br />
and agree the<br />
installation process”<br />
option is to position the bonding gutter so that it<br />
is wholly on the side of the roof being renewed<br />
and there is no encroachment onto the<br />
neighbour’s side.<br />
This is particularly easy to do for bonding gutters<br />
that sit over the tile battens, such as those shown<br />
in illustrations 2 and 3, as there is no need for<br />
any additional structure support for the bonding<br />
gutter lining.<br />
In summary:<br />
• Bonding gutters form a weathertight<br />
junction between differing roof tiles or slates.<br />
• Ensure all tiles or slates fitted directly<br />
over the bonding gutter weather channels<br />
are securely fixed – ideally use screws, but<br />
take care not to penetrate the gutter lining.<br />
• Where installing over a party wall, ensure<br />
the firestopping is present and not<br />
compromised.<br />
• Try to reach agreement with the<br />
neighbours before starting work. If that is not<br />
possible, install the bonding gutter wholly on<br />
the roof being renewed.<br />
Contact John Mercer<br />
www.johnmercerconsultant.co.uk<br />
@Johnmercer3<br />
helping pe eople<br />
embrace light,<br />
air and space.<br />
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LPS 2081: Issue 2<br />
Cert/LPCB ref: 1347a<br />
CALL US: 0333 016 4176<br />
EMAIL: info@rooflights.com