The increasing relevance and popularity of external wall in sulation systems on solid wall homes doers have consequences on the external fittings and features of a property and the following are some considerations that need to be taken into account.

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On average the wall surface will be brought forward by around 65mm or 2.5 inches in old money. Most modern upvc window cills tend to extend 50mm from the wall surface so will need to be extended by around 50mm further to enable the cill to overhang the insulation depth and still shed water efficiently.

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Tiled cills and wooden cills can be similarly extended but stone cills are usually prohibitively expensive to replace on a like for like basis but can be over capped with upvc as a last resort if desired.

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Another alteration that can be needed are to roof lines that have insufficient soffit depth to allow the insulation to be tucked under them without water getting down the back of the insulation boards. Choices here are usually to either extend the roof tiles or more simply to fit an aluminium overtrim on top of the boards that acts like a roof cover and angles water away from the boards.

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The final most common alteration is to down pipes and waste pipes and both of these tasks are fairly straight forward. The exception being if the old rainwater goods are cast iron and usually are secured very close to the wall surface. Whereas upvc pipework is easy to remove and then re-position afterwards ,with cast iron this is not possible without shearing off the retaining plates and screws. In these circumstances it is best to relace with new pipework or if acceptable work around the pipework but avoiding creating any cold bridges.

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If you require further info or want to ask any questions on any of the above then please call on 08456 345 866

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