Roofing systems, supporting structure, refurbishment. Valley detail 9 wvalley prior to placing, install a second layer of underlayment or water and ice shield centered along each valley. Complete details can be found in the building component safety information guide to good practice for handling, installing, restraining and bracing of metal plate connected wood trusses, available through sbca structural building components association and tpi truss plate institute. Ssr, decorflush, powerseam, grandcurve, high seam, posilock so slim seam, snaponbatten, snaponseam, stand n seam, thin seam, trib for metal roofing systems fascia and mansards soffits. Materials, design, applications detail construction. Today, some building codes may require a more rigorous structural design methodology than is associated with conventional construction. Its essential task is to shelter the space beneath it from the elements. Ceiling and roof framing 40 ceiling joists 40 flush ceiling framing 42 post and beam framing 42 roof slopes 44 flat roofs 45 pitched roofs 45 valleys 48 dormers 48 overhangs 48 ridge beam roof details 49 lightweight wood roof trusses 49 chapter 8.
This could mean flat roofs may not raise the same red flags they used to. Wear softsoled shoes to improve traction and to minimize damage to the paint finish. The basic construction of a flat roof starts with roofing timber that is laid across two upright items, usually two walls. Writing of the manual began in april, 1984, under the auspices of the committee. The following conceptual details figures 91 to 96 show some of the typical conditions commonly encountered. The second part describes in detail the steps that. Chapter 8 construction details provides technical information concerning the design and installation of construction details for quality spf roof systems.
Also, manufacturers installation instructions and architects construction drawings and specifications always take precedence over the details in this best practices manual. See more ideas about flat roof, roof, roof construction. Traditionally, domestic flat roofs use two or more built up layers of bituminous felt as their weather proofing. This standard details manual, aka the blue book, is the right tool to have at your fingertips. It must provide adequate protection against the elements, keeping the buildings structure and interior dry. A guidebook of fieldtested construction details from the maritime pacific nw.
Structurally, a roof is constructed in the same way as an upper floor, though the shape of its upper surface may be different. It is for that reason that the flat roof construction manual focuses on the subject of designing energysaving flat roofs free from damage. This introduction is intended to supplement the special notes on the individual construction details. Beyond this, the use of flat roofs may be optimized by integrating them as green roofs, roof terraces, circulation areas, and even productive solar roofs.
To begin our study of flat roofs, part a outlines their. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. 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. Box gutter detail pdf downloads hambleside danelaw. Roof pitch the roof pitch is the numerical measure of how steep or shallow a roof is. A complete guide to commercial flat roofing systems.
Introduction 1 preparation 2 basic procedure 3 multiple walls 8 details 10 folded inside corners 12. Pdf flat roof construction manual by klaus sedlbauer, eberhard. Oct 03, 2003 drainage of flat roofs overflow weirs rainwater pipes and drains inside buildings siphonic systems. Waterproof membrane with a protective covering this should prevent water reaching the roof structure and the room below. As you may imagine there is a fair amount of weight involved here, in terms of boards, felt etc. The details included here establish the best known methods of installation for rooftop mounted equipment. For details not included in this manual, refer to the latest edition of the smacna architectural sheet metal manual.
Aug 14, 2017 it is for that reason that the flat roof construction manual focuses on the subject of designing energysaving flat roofs free from damage. Building construction can have a significant impact on roofing system selection and design. The versatility, recyclable content, structural performance, and ease of installation make steel deck the ideal building material for architects, building owners, and engineers. Building construction can be generalized into two basic categories. Construction details are provided for the following spf roof system types. Framing a roof berlinboylston regional school district. Green roofs are installed over a modified version of more conventional flat roofs, and are normally comprised of a system that is sold by several green roof manufacturers like soprema. Some observers suggest its 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. Always be aware of your position on the roof relative to any roof openings, roof edges, coworkers, and penetrations. Firestone has developed cad drawings of its epdm installation details to assist roofing professionals with the specification of firestone epdm roofing systems. Griffin, this is one of the most comprehensive written guides to commercial flat roofing. Commercial roofing specs and details find the resources you need to design the best roofing system for your project. In practice, however, their correct and professional realization is a highly. Wall sheathing 53 types of sheathing 53 corner bracing 54.
Hold your cursor over the file name to view when a drawing was last updated. Old asbestos roofs are often replaced with flat roofs. Yet for historic modernstyle 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 of course, you dont need to live in a modern house to deal with a flat roof. Velux bim models, drawings, and specifications skylight. This type of roof is more complicated than the figure 21. A flat roof must be strong, durable and stable throughout its lifetime. Bitumen membranes should be protected from the sun see surface protection section. Any discrepancies with this manual should trigger discussion. On this page you can find the pdf instructions for installation of a typical box gutter detail with the dryseal flat roofing system. Materials, design, applications detail construction manuals print replica kindle edition. The design of the roof will depend upon the size and shape of the ground. Intersecting the intersecting roof consists of a gable and valley, or hip and valley. Natural building technologies ltd the hangar, worminghall road, oakley, buckinghamshire. Flat grain and limited sapwood are permitted in this grade.
Flat roof construction how to build a flat roof flat roof. Flat roof construction manualklaus sedlbauer 20121217 often. Guidance flat roof components building regulations 4. Flat roofs arent architecturally logical, as rain and snow will shed much more quickly off a sloped roof. Barthel edition detail kiessl roof construction manual pitched roofs eberhard schunck hans jochen oster rainer barthel kurt kiessl birkhauser publishers for architecture basel. Sika house miller street preston pr1 1ea 01772 259 781. Construction details are provided for the following spf roof. Sika sarnafil watchmead welwyn garden city al7 1bq 01707 394 444.
Liquid applied systems such as glass fibre were introduced and are now quite widely used. Sheathing goes down quickly on a roof that isnt sloped and thus provides some footing. Double roof with hipped end there are many designs and combinations of double roofs. Metal roofing installation guide mightyrib pbr rpanel regardless of whether your roofing project is a new installation or a re roof, and whether your building is residential, commercial or agricultural, our metal roofing panels and paint systems have been created to exceed your requirements and expectations. Rigid construction is primarily based on reinforced concrete, solid brick masonry and stone, and structural steel with solid masonry walls. Never attach any roof flashing directly to rooftop unit. Architect introduction editorinchief, detail, munich ulrich max. Wcd1 details for conventional wood frame construction.
For existing roofs and for new roofs with complicated flashings, please also see our acrylic roofing handbook. But now, flat roofs often are constructed with fewer layers because of improved waterproofing technology. Recently, the national tile roofing manufacturers association ntrma changed its name to tile roofing institute. Guidance flat roof types building regulations 4 plans. Flat roof construction manual materials design applications. F details 24 section 2 jjijoists jjijoists 05 introduction 06 jjijoist properties 07 service holes 08 acoustics 09 fire and durability 10 health and safety 11 site storage and restrictions 12 section 5 roof design roof design 33 design considerations 34 flat roof, cold vs warm design 35 span tables flat roof 36 span tables pitched roof 37.
Flat roof construction how to build a flat roof flat. So in reality flat roofs are never totally flat but rather have a slight fall the minimum of a flat roof is 1. That will help you remember certain factors and details to build the best possible flat roof. Evolution of company asc steel deck has provided structural steel roof. Thirteen fundamental roof types and the relevant materials including thatch, wood, slate, tile, concrete, fibrous cement, bitumen, glass, metal, membranes, and synthetic materials are documented in.
In preparing the draft, we discussed many ways of incorporating relevant information. Chapter 8 construction details progressive materials. For details, call 18006682642 or visit our website at. Roofs there are many factors in designing roofs including. The first provides background information, either explaining the basis of the recommendations in bs en 120563 or, in some cases, giving additional data. The driving factor in terms of outside temperature is the sun. The detail drawings are grouped by detail type and can be downloaded below in dwg or pdf format. Roof consists of structural elements which support roof is roof covering. Building length and width neither the building length nor the building width, shall be greater than 80 feet.
Structural clt floor and roof construction presenter. Install wvalley flashing and secure with galvanized flat screws or galvanized nails. Technical manual for the design and construction of roofs of. Cette publication est aussi disponible en francais sous le titre. The basic construction of a flat roof starts with roofing timber that is. Interactions on a flat roof construction blue colour moisture. Metal roofing panels are slippery when wet, dusty, frosty, or oily do not attempt to walk on a metal roof under these conditions. Bureau design and application manual for new roof construction. Start reading flat roof construction manual for free online and get access to an unlimited library of academic and nonfiction books on perlego. It is more accurate to describe such a roof as semi flat. To ensure the construction of a quality roof deck, provisions for the following items should be included in the deck design live loads, such as moving installation equipment. The valley is formed where the two different sections of the roof meet, generally at a 90 angle.
A significant environmental improvement to roofing applications has been the invention or adoption of green roof practices. Gaf roof design manual construction submittal tools. Velux bim models, drawings, and specifications roof windows. Having a manual for warm flat roof construction with details and a summary of rules to follow helps. A roof must have some slope in order to shed rainwater. It is for that reason that the flat roof construction manual focuses on. Green roofs are installed over a modified version of more conventional flat roofs, and are normally comprised of a system that is sold by several green roof. This requirement may result from a need for better building performance when the structure is exposed to moderatetohigh wind, seismic, and snow loads. Whether youre in the design phase or on the roof, we can provide the tools and support to get the project done right.
Shows how to measure and estimate most roofs including estimating shortcuts discovered by the author. In modern double roof construction, the whole of the roof is constructed of lightweight roof trusses called trussed rafters see module 4. Insulation of new flat roofs must satisfy part l of the building regulations. Wood screws with combination metal and neoprene washers should be installed in the flat area of the panel adjacent to the ribs, and tightened such that the washer is compressed as illustrated above. Beyond this, the use of flat roofs may be optimized by integrating them.
The incidence of direct or diffused sunlight short wave irradiation on a flat roof surface is very important in helping to dry out the construction to the inside. From there, the flat roof system you choose will determine the materials you apply. Good roof systems depend upon the structural integrity of the roof deck. Sika limited watchmead welwyn garden city al7 1bq 01707 394 444. A copper roof was used on the rebuilt old senate chamber in 1819. Designs and construction detail of mono pitch roofs. A flat roof is a multilayer construction typically comprising of the following elements. Standard details for metal welcome to diamond l building. The importance of building it right photo by russell kaye.
In january, 1987, the roof tile committee of the frsantrma was commissioned to develop and write consensus guidelines for the installation of concrete and clay roof tiles. The most commonly used types of pitched roof construction are the gable, the hip, the intersecting, and the shed or leanto. Gable a gable roof has a ridge at the center and slopes in two directions. For green roofs, please see our green roof handbook. Windows, vents, exterior doors detail construction manuals roof construction manual, english edition. Overdriving the nail can split the washer and dimple the metal, causing leaks. Mean roof height the building shall not exceed three stories nor a mean roof height of 33 feet, measured from average grade to average roof elevation see figure 1.
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