Lead Flat Roof Construction Details

When the lead rests directly onto sawn timber on a steeply pitched roof and non resinous timber has been used underlay may not be necessary.

Lead flat roof construction details. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape. When choosing a flat roof you need to take a number of considerations into account including the look you want to achieve the size of your flat roof the type of weather it ll face and the amount of labour it will require. More about lead as a building material. Insulation for the warm flat roof only the basic construction process.

But now flat roofs often are constructed with fewer layers because of improved waterproofing technology. Some observers suggest it s harder to replace a flat roof than a traditional pitched shingle roof because of the labor required to remove its layers especially on older flat roofs. Lead is commonly used for flat roofs because of it s long life and ability to be formed to fit many positions lead must be laid and formed correctly to achieve this long life however. That will help you remember certain factors and details to build the best possible flat roof.

It is shaped to prevent wind lift. On a low pitch roof where the lead isn t free to move it is more likely to buckle on expansion or stretch as it contracts. 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. Sizes of joists needed for flat roof construction.

A guide to flat roof options. The temperature of lead on a roof varies constantly. Old asbestos roofs are often replaced with flat roofs. This could mean flat roofs may not raise the same red flags they used to.

Roll detail at drips and abutments 41 flat roof roll and drip intersections 42 pitched roof joints and fixings 43 pitched roof intersection with valley 44 vertical cladding joints and fixings 45 vertical cladding head finishes 46 dormer windows jambs and s ill 46 dormer windows tops jambs soffit and side cheeks 47. Options for the restoration of a metal roof surface include acrylic coatings made of polymers that cure to form a durable continuous elastomeric membrane over the surface of the metal roof and can be added to metal roofing systems to address your building s specific needs around waterproofing rust and uv protection. So any timber joists that are used need to be strong enough to support this weight. Of course you don t need to live in a modern house to deal with a flat roof.

As you may imagine there is a fair amount of weight involved here in terms of boards felt etc. 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. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof.