Over Cladding Asbestos Roof Sheets

The first stage is to fix a framework to hold the metal sheets in place directly to the purlins underneath the asbestos cement roof sheets.

Over cladding asbestos roof sheets.

This is a cost effective approach with an aesthetically pleasing and watertight result. As the weight of the system is less than that of the potential water absorbed by the existing asbestos cement and fibre cement sheets there is no requirement for structural calculations. In certain circumstances asbestos containing materials such as roofs maybe over clad. However many asbestos roofs are built with concrete portals meaning the roof is supported by a small number of concrete arches.

Over cladding adds one or more additional layers on top of your existing roof. The insulation is then installed into the framework often an ashgrid system so named after the original manufacturer ash lacy construction and the metal weather sheet is the fixed to a bar. This can be used to increase the insulation in your roof bringing your property in line with current legislation and lowering heating bills. This means the new roof cannot get enough stability on top of the old one a common risk of over cladding.

This stops any leaks and leaves you with a brand new roof without having to disturb the old one. Over cladding or over sheeting asbestos roofs means the original asbestos roof stays where it is while new sheets are positioned on top and secured by a fixing that goes through the old roof and attaches to the existing structure of the building. Cladding over asbestos unfortunately asbestos releases harmful fibres if disturbed and causes harm if it s inhaled. At roofclad we strongly recommend not going down this route and replacing the roof instead.

But over time people are now replacing asbestos sheets to asbestos free alternatives because it s safe. Asbestos over cladding in some cases asbestos containing materials need not be removed and can instead be over clad. It can also be used to reseal your roof making it watertight again and to protect the existing roofing structure from the elements preventing further damage which might lead to the entire roof needing to be replaced. Filon over roofing is lightweight yet strong and is manufactured to the same profile as the existing roof.

It therefore requires no additional structural supports. Once the sheets are coated or painted this cannot happen any more and an increase in condensation in the winter is inevitable. One of the most common construction materials used in older buildings is the cement sheeting or fibro cladding. Extend the life of your asbestos roof with over cladding.

Asbestos cement roof sheets are designed to be a wee bit porous allowing the sheets to breathe. Roof cladding requires bolts to be drilled into the asbestos roof.