Lead Flat Roof Construction Details

Lead sheet one of the oldest and most durable roofing materials has been known to last for over 200 years.

Lead flat roof construction details.

N recommended by the lead sheet association. N designed for lead masonry and lead brick pointed work. N avoids problems of cracking and lack of adhesion associated with mortar joints. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.

N neutral cure product. Our basic fitting guides are designed to assist installing rolled lead sheet in a range of roofing applications including flashings valleys gutters and flat roofing. It invariably can be found in a number of locations on a roof s profile and it s main function is to channel and deflect rainwater. For roof detail the gauge of lead to be used will be dependant upon the application.

Lead detail lead is commonly is used as a means to complete and help maximise the efficiency of a roof s water sheddings qualities. N cleaner quicker and easier to use than mortar with high adhesion to both lead and masonry. The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure. This will give additional stability to the roof structure.

Wood core roll is used for joining bays of lead roofing also on steeply pitched roofs and lead cladding where a bold joint appearance is preferred. N gives a permanent flexible and waterproof joint. Lead code is a way of combining thickness and weight very handy to know if you re thinking about lifting it off your van and onto a roof. Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board.

For additional stability you can also use steel joists that are built into one or both of the walls. Lead for the purpose fitting to a roof or bay window really starts at code 4 in theory if the roof is small enough you could use code 3 but this would normally be classed as a flashing lead i e. One particular problem which has been the subject of increasing concern speculation and debate is the tendency for condensation on the underside of metal roofs to cause corrosion. Small over flashings or leak soakers.

From there the flat roof system you choose will determine the materials you apply. Flat lead roofs should be laid with a slight fall. It is shaped to prevent wind lift. Wood core roll as used on ridges hips and flat roofing wood core roll is to be used to allow for the expansion and contraction in lead sheet and flashing.

However even with the best of materials poor design often leads to failure. On a basic level flat roof construction comes in the form of roofing timbers or joists as they are more commonly known or steels that are laid across two uprights walls in most cases.