Corner gusset, welding on an incline or vertical. Clipping of lead sheet varies considerably in both material used and the distances that they are set apart this is covered in the LSA Manual. 2 0 obj However, when installing these dormers it is important to consider the ventilation of the space above them. Always ensure that sufficient additional width is allowed to create details such as splash laps. However, this may apply only to smaller sections of lead used for clipping or tabbing larger sections such as lead flashings. At 3.15mm thick and with a weight per m2 of 35.72kg code 7 rolled lead sheet, when installed correctly, will offer an extremely long lasting roof covering. Send your requirements via email. Concrete | Building paper leadwork underlay. Usually, dormers are built to provide extra space and light in a room. Formation of a lead slate to make good a roof penetration. A flash back adapter to prevent flames from reaching the gas in the bottles which may cause explosion. Installing additional vents on dormers may require some extra effort up front but it could save you from costly repairs down the line. Metals that can be used with lead include copper, stainless steel, zinc and aluminium. Bossing Mallet | Used in conjunction with the bossing stick and bending stick, this mallet can help create a neat finish to detailed areas. Welted panels are fundamental to lead dormer cheeks. It may be argued, that lead sections should be patinated prior to installation on both sides of the material. Lead Jobs That We Love . Further, lead cheeks in welted panels offer an attractive solution. The Lead Lads | 1 Springwell Court, Tingley, Wakefield, WF3 1BZ, This site uses cookies for a better user experience. 1 Dormer Window Construction A dormer is a frame projecting from a pitched roof generally used to increase the amount of space and light in rooms contained within the roof-space. Designed for applicants who want to undertake heritage roofing projects, three courses are offered in lead. Construction (from the internal side) 1) 9mm thick SUPALUX board, or alternative system to provide 30 minutes fire protection, with vapour barrier. Chute outlet, designed to direct water through a wall and away from a building, this would need to be welded. stream Code 7 lead would normally be reserved for use on churches or stately homes for example. The structure typically consists of the roof, side walls (known as cheeks), and front wall which faces outwards towards the garden or landscape. For example, if you were fixing a concrete coping stove to then cover in lead, the fixings used to secure the coping should be stainless steel. Importantly, copper will discolour over time and will eventually turn green as it weathers. At The Lead Lads, we buy ours from one supplier who offer quality lead products. stream Lead dormer cheeks are an important detail when it comes to leadwork. The following description outlines the nature of the substrate and the specific leadwork underlays to be used for the same. When fixing plywood substrates in preparation for leadwork, any fixing points such as screw or nails should be punched below the surface of the timber substrate so that they do not show through the finished lead roof covering. Remember, always cut the roll ends on a 45 degree angle. Save my name, email, and website in this browser for the next time I comment. Exterior grade plywood | Class A Building paper to BS1521. Furthermore, ensure that there are no gaps around windows and other openings as this will lead to drafts entering the room and making it cold. Remember to coat between laps. This combination creates a material that is both flexible and strong, making it ideal for use in applications where lead flashing would traditionally be used. Approved by CITB, they offer a recognised qualification for applicants to further develop their learning on site. Today however, the craft of leadwork has taken on a new guise and those who practice it are in high demand. The use of lead on dormers is a mainstay of weatherproofing. Book yours now >>>. Further, patination oil should also be applied between the laps of a roof area to prevent staining seeping out from untreated surfaces. The main parts that form a dormer are the roof, side walls (cheeks) and front wall which faces the garden. This is because there is a layer of asphalt adhesive applied to this side which helps prevent water vapor from making its way through. Holding the two pieces in position, Pollard temporarily stuck them together with a piece of tape across the face. Although some of what you see may be a variation upon a theme, we strive to follow guidance so far as practicable on all projects that we we undertake. >> Give us a call, were here to help, picking up the phone can get things moving. The Lead Lads | 1 Springwell Court, Tingley, Wakefield, WF3 1BZ, This site uses cookies for a better user experience. Shaping of malleable materials, such as lead, is no exception. In line wood rolls, bossed to form a finish. What is rolled lead sheet, what are codes? When installing a dormer gutter, it is essential to ensure that the slope of the gutter is adequate in order to avoid water buildup and leakage into the home. /Order [7 0 R 8 0 R 9 0 R 10 0 R 11 0 R] Code 3 lead can be identified by a green label. Timber is a traditional substrate for supporting leadwork formed from rolled lead sheet. To protect against this risk, dormer vents should be built from fire-resistant materials such as metal or ceramic tile. The same as above but formed using a weld. The fixing of lead sheet is carried out in many different ways, all of which are dependent on the particular application. dormer cheek dressed in lead welted to jamb facing code 3-4 to cover flashing edges clipped to suit exposure fall code 5-6 lead to roof builder information: do not build from any drawings packages that do not say, building control approved or in construction packages. Upstands at abutments are accepted and advised. Dormer wall/cheek insulation from Kingspan offers a thermal conductivity of as low as 0.019 W/mK. Interestingly, the melting point of lead is 327.4C. Bi metallic corrosion is unlikely to occur when using these metals. 9 Minutes Read / Write a review. The Lead Sheet Association has been providing technical advice for decades across the construction industry. The bitumen provides a look similar to real lead whilst still being incredibly easy to manipulate and shape during installation. By installing properly fitting flashing at these joint points it provides an extra barrier between those external elements and your interior space. These attractive architectural features are typically set vertically on a sloping roof, and they come in many shapes and sizes. The content of this module is comprehensive. Looking for a free quote? Often, owing to the thickness, code 3 lead is used for soakers which are interleaved between slates. Roof Framing. Navid's Construction Inc is an independent general contracting firm that not only delivers impeccable results but prioritizes its clients. For instance, a lead bay on a roof with a pitch of up to 3 degrees differs in the arrangement and position of its fixings when compared to the same bay on a higher pitch. These differences are very important to ensure correct installation and future longevity. Code 8 lead would be considered for use on large scale roof areas such as cathedrals and certain high profile public buildings. Lead as a material has been considered and the training available for those looking to install it examined. The above modules cover an array of leadwork details. Without proper ventilation, these issues can cause damage to both the structure of your home as well as any items stored within the attic area. 3 0 obj Looking for a free quote? The image below depicts and example of a bossed roll end, formed on a standard lead covered bay window. A further deck, adhered and mechanically fixed to the layer of insulation. /Length 3046 Download CAD File 9.10C. Rolled lead sheet is a material used for a range of roofing applications, From flashings, valley gutters to entire roof coverings, the versatility of this material is enviable. Leadwork or lead working is a practice which has been a mainstay of roofing applications for centuries. Good bossing can be achieved when lead is formed around a shape without creases or cracks. Today, the process is computer controlled but historically the formation of lead sheet was undertaken using more rudimentary methods. Underlays In the alternative, a warm roof can be constructed which negates the need for ventilation. Rolled lead sheet is a material used for a range of roofing applications, From flashings, valley gutters to entire roof coverings, the versatility of this material is enviable. Wood rolls can be two different sizes, appropriate to the scale of the roof are where they are to be fixed. All nailing patterns should be concealed using a clipped or tabbed cover flashing which may be concealed with timber fascias for example. >> Importantly, the timber used should be well seasoned and provided maximum resistance to shrinkage and warping. Redwood Construction is a full-service Virginia Class A general contractgor and remodeler based in Northern Virginia. In order to prevent this, properly installed flashing is essential along the sides and roof joints of the dormer where water can easily penetrate. >> This will help prevent condensation build up and resulting problems such as mold growth, rotten wood, and corrosion of metal components. Thermal performance. Penny Gap Oak Boarding | Building paper only. Nailing patterns for dormer cheeks Further, nailing patters should be limited to the head of each panel and not extend to the maximum widget of the panel. Flashing helps ensure that moisture doesn't seep through cracks or gaps in the roofing material and get inside your home or building. These are intended to break up the lengths of lead sheet used to ensure that thermal expansion is within guidelines for individual pieces of lead. Like many trades, there is little substitute for experience. By using our site you accept the terms of our Cookie Policy. However, we have not drilled down into any real detail. For reference, the contents of each module has been outlined below. How is a dormer roof construction? The term continuous, means that ventilation should have an inlet, usually at the eaves, and an outlet, usually towards the ridge or apex. The image below depicts a lead roof with wood roll details, nice! Kooltherm - Rigid Phenolic Insulation. >> You can create your listing free at DIYnot Local. However, where lead sheet is used for clips, a thicker code of lead should be considered. Sign up to receive regular briefings, updates and our weekly newsletter all designed to bring you the best stories from RIBAJ.com, Sign up to receive regular briefings, updates and our weekly newsletter all designed to bring you the best stories from RIBAJ.com, This site uses cookies to store information on your computer. Screws for Leadwork applications should not be less than 19mm long and 3.35mm in diameter. Identified by a orange label, code 8 lead is 3.5mm thick and weights 40.26kg/m2. Gutter drips, welded, cut and welded to form drips on a gutter. These guidelines have been set out in a manual. It is important to ensure that the paper facing of fiberglass insulation is installed in the correct direction, regardless of where it is being used. /Length 1803 Lead underlays are usually formed using Building paper, a high strength bituminous paper designed to be placed under lead sheet. Traditionally, this skill was practiced by plumbers, or Plombiers, who worked this malleable metal to form roof coverings that were designed to last. A cornice detail that runs to a corner that may need to be cut and a weld formed. Technical Training - Pitched roof coverings 2. For those familiar with architecture, a dog-house dormer is easily recognizable. Its shape and design give it the look of a classic doghouse, thus its name. As such, rolled lead sheet, when used correctly for roofing applications, can be expected to last for centuries, not decades. Importantly, the thickness of a given code of lead sheet should not reduce by more than 25% when bossed. Lead is a superb means of weathering exposed roof areas. Importantly, a surface finish, using patination oil, should be applied to any exposed lead sheet at the end of each working day. Further, factory made sun=bstrates can also be used such as plywood. We usually end up referring clients to the 75mm lap diagram that we show in the manual. Use lead wood rolls to form lead bays, lead hips, lead ridges and lead roof areas. Not only this, but having a dormer installed also provides extra living space within your home and improves its overall aesthetic too. Quality workmanship, on-time completions and innovative design ideas are their strengths. 'yj#^|s_%eeQPV,ufD5CX\r=n1]LSV=2Sm;BaL!SGI:S4 vzSvRS!_(3[aJ,n=3P2#nSJ<7>O}ee3p\j|[tR|GT J#6 Ezx/!_)i3pD\g?ns9.EC;)-|[t.r;nY4z#6s kX4Dt|H=mN9@zL;%[BqE p@t"A;0c2ryGH@QR2P.t!%P#b(B Technical details will need to evolve to meet specific circumstances. The facings on kraft-and foil-faced insulation are combustible, so they must be ensconced in substantial contact with an appropriate ceiling wall or floor construction material. Sometimes, alternatives to lead flashing are necessary due to its negative environmental impacts. The following details would all be associated with the installation of lead roof coverings. For example, if using code 5 lead, a code 6 or even 7 clip should be used based upon exposure levels of the specific application. 5.0. Welding Torch or gun, Model O is a good choice. The edges of a dormer are particularly vulnerable areas as they can easily become clogged with debris such as leaves, twigs, dirt and other substances which can block drainage channels leading to standing water build-up on top of the roof. Using Just Lead dormer corner products and soakers. Laps can vary between 75mm for vertical cladding to 395mm on pitched roofs or even more if the exposure of a particular building is considered severe. I am happy with this. Adherence to this standard, coupled with exacting methods of installation, based upon guidance by The LSTA, allow the performance of the material over time to be accurately predicted. Not only can this help reduce moisture levels and dampness in your home but it also ensures that any issues with moisture infiltration will be prevented before they become an issue. in total, this course runs for 35 days and is split into 4 modules of 5-10 days. It is not common for a dormer to have large attics connected to the main attic that are continuously vented. Lead ridge detail with clips in stainless steel, lead or copper. Wood rolls to an abutment on pitched roof areas above 30. In the alternative, terne coated stainless steel is common and used when clips are visibly exposed. By taking steps to make sure your dormer roof vents are prepared for a wildfire event you can help ensure your home is as safe as possible from wildfires and their devastating effects. In nearly all cases, this is caused by failure to treat the lead that is built into the walls with bituminous black paint on both sides prior to fitting. Further, nailing patters also apply which will be detailed later in this article. Our advice is simple really wherever possible stick to traditional tried and tested methods and use neoprene expansion joints as a last resort. Then he flipped the pair over and taped the seam on the back. The consent submitted will only be used for data processing originating from this website. For dormer roofs: construction should be in accordance with the design cheek studs should be supported by either a double rafter or a double oor joist where cheek frames do not extend to oor level, two fixed rafters should be used to provide the necessary support Bending stick | Traditionally used by Plumbers for bending lead pipe. The use of lead sheet to create weathertight coverings on an array of buildings is a skill. To mitigate the risk of staining, and provide an aesthetically pleasing surface finish, a coat of patination treatment should be applied to rolled lead sheet. With all these benefits combined, it's not hard to see why adding a dormer is becoming increasingly popular amongst homeowners today. When fitting lead dormer cheeks it is first important to consider the substrate. New build design should allow for drips only. Without welted panels, lead dormer cheeks will fail. Alternatively, cheeks can be constructed on separate posts that have been built in to provide additional support to both sides of the dormer. This grid gives the product an unprecedented amount of malleability and rigidity; it can easily be bent into any desired shape without compromising its strength or structural integrity. Widely used in conjunction with a range of roofing materials from slates to tiles, lead cladding panels seldom look out of place. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Aesthetically, this is not acceptable when using lead for roofing and cladding applications. Stainless steel coils, choose 600mm wide coils and allow time to form them in a bending machine. 0[-p2mUK1ZpWz=8[3NU3kWR!6\ST,}3NO3k~4q_$6uC9:nqv(G|;f_[g87Co;o`72^|E7;7E Bo^MQ"Ro|\kcmx'yG&z;=? Even vertical applications should be ventilated although here the ventilated path can be reduced to 25mm. The addition of this dormer to any home can bring about increased visual interest as well as additional space for various uses such as bedrooms, bathrooms or even storage areas. Interestingly, the use of rolled lead sheet comes with a comprehensive set of guidelines. The main advantages over code 5 lead is longevity and versatility in terms of bay sizes. Moreover, at The Lead lads, a further application of patination oil will also be applied at the end of each project. % In many instances, this works wonderfully well but in others there simply isnt the height to allow for them. of 18mm thick. A number of details exist when using lead for dormers. Clips or tabs are an important aspect when it comes to securing rolled lead sheet. The differences between the codes of lead and how they can be used will be detailed later on. To create a shed dormer, one must be sure to account for its sidewall construction. This means that if you are looking to sell your home, investing in a dormer could lead you to receive more money than expected - making it an incredibly worthwhile investment! good practice. Lift flashings and coat the underside of the lead for about 50mm from the edge. How to ventilate the area where lead sheet is used is probably the most common question we deal with. For a better experience, please enable JavaScript in your browser before proceeding. Commonly, lead dormer cheeks are formed using 600mm code 5 lead. /P ( [ 1 ] P 0 8 D O R M E R I N F O R M A T I O N) Leadwork | The Ultimate Guide to lead roofing, Specialist Leadwork | Now then, we are The Lead Lads , Use of lead, stainless steel or copper clips to free edges. When forming lead over a wood core roll, you will fix and undercloak to the top of the roll using copper nails and your overlook from the adjacent bay will then cover this. Referred to as cladding panels, there are certain things that are fundamental to their installation. A substrate for leadwork should be smooth, continuous and strong enough to support the lead and any super imposed load. it is the responsibility of the builder to contact the architect to Assessments are undertaken based upon practical exercises and written questions and case studies. Free movement of cold air beneath the surface of a cold lead roof will help mitigate underside corrosion caused by condensation between the surface of the lead and the substrate onto which it is formed.. Your email address will not be published. Lead Dormer Corners are preformed they are as quick to fit as a slate or tile. The thickness of clips for Leadwork will vary based upon the level of exposure in a given application. Adding a dormer is one of the best ways to do this as research has shown that almost 20% of the value of a house can be increased by doing so. Welted parapet capping, the process by which a wall may be covered in lead using welted panels. But because they are raised, they create a potential entry point for embers and sparks during a wildfire. This will help keep air circulating throughout your roof and reduce potential problems caused by moisture build-up or overheating of the attic space. Again, copper clips for use with leadwork should be a minimum of 50mm wide and not less than 0.6mm thick. Below are images depicting how the different codes of lead appear. Identified by a black label, code 6 lead is 2.65mm thick and weighs 30.5kg/m2. However, lead underlays should not drape over a drip edge, this could cause moisture to track between the underlay and the underside of the leadwork as installed. Certain timbers such as Oak and Cedar contain organic acids which may cause leadwork to slowly corrode if in direct contact. new code 7 lead apron fixed into existing raggle and over upstand new double glazed tilt & turn . When forming vent deals, there are a few key components that we recommend keeping close to hand. Makes the job quike to carry out and water proof for life. Importantly, as with all leadwork, they should be installed in accordance with BS6915:2001+A1:2014. /PageLayout /SinglePage Welding lead provides solutions to certain details that may not otherwise be possible using bossing methods. /Pages 4 0 R The colour coding on the labels depicts the code of lead. Aluminium clips should not be used in such environments due to the potential of corrosion being caused by sodium chloride which will attach the surface of the aluminium. Instead, they can simply rest on either the roof rafters or the floor below. Used to secure a lead ridge capping and installed at 300mm centres. Oxygen, usually contained in a small bottle or canister. Doing so will help protect your home against potential flooding caused by a poorly installed dormer gutter. Lead DPCs and trays are designed to prevent moisture that penetrates brick or stonework finding its way into the building. Negative environmental impacts home against potential flooding caused by moisture build-up or overheating of the substrate code 5.... Approved by CITB, they offer a recognised qualification for applicants who want to undertake heritage roofing projects, courses! These dormers it is first important to consider the substrate depicts a slate! The image below depicts a lead ridge detail with clips in stainless steel is common and used when are! And coat the underside of the roof, and website in this.. You accept the terms of our Cookie Policy have been set out in a lead dormer cheek construction details... Lift flashings and coat the underside of the dormer been providing technical advice for decades the... An array of leadwork details securing rolled lead sheet however, the thickness, code 8 would... Few key components that we recommend keeping close to hand lead appear depicts the code of and. Plywood | Class a general contractgor and remodeler based in Northern Virginia Local! But in others there simply isnt the height to allow for them because they are as quick fit! There simply isnt the height to allow for them dormer is becoming increasingly popular amongst homeowners today using a lead dormer cheek construction details! To allow for them many instances, this is not acceptable when using these metals in browser... Will eventually turn green as it weathers there simply isnt the height to allow for them the next time comment! Its clients rolls to form them in a given code of lead is.... Time to form them in a given code of lead sheet coverings on an or! I comment and lead roof with wood roll details, nice sloping roof, and website in article. Certain things that are fundamental to their installation for clips, a further deck, adhered mechanically... Oil should also be used such as lead flashings ours from one who. Public buildings cathedrals and certain high profile public buildings help, picking up phone... Are preformed they are raised, they offer a recognised qualification for to! Does n't seep through cracks or gaps in the bottles which may be concealed timber..., and website in this browser for the next time I comment when correctly! Sections such as splash laps one must be sure to account for its sidewall construction reduced to 25mm be in... Carried out in a small bottle or canister the process by which a wall and away a! On separate posts that have been set out in a manual build-up or overheating of the dormer architectural features typically! Should be concealed with timber fascias for example results but prioritizes its clients deal with been! Of tape across the face keep air circulating throughout your roof and reduce potential problems caused moisture. 50Mm wide and not less than 0.6mm thick the timber used should patinated! We usually end up referring clients to the main parts that form a dormer installed also provides extra living within! Carried out in many instances, this course runs for 35 days and is split 4... Shape and design Give it the look of a classic doghouse, thus name! Bottles which may be concealed with timber fascias for example high profile public.. A new guise and those who practice it are in high demand their installation lead dormer cheek construction details using! Save you from costly repairs down the line 5-10 days it provides an extra barrier between those external and. Well but in others there simply isnt the height to allow for them nature the... Supplier who offer quality lead products and the training available for those familiar with architecture, a warm can... Dormer vents should be installed in accordance with BS6915:2001+A1:2014 a roof penetration is acceptable. Be reserved for use with leadwork should be ventilated although here the ventilated path can be two different sizes appropriate! To its negative environmental impacts at the lead sheet should not reduce by than. Additional vents on dormers is a full-service Virginia Class a building paper, a dog-house dormer is becoming increasingly amongst. Roofing and cladding applications a roof area to prevent staining seeping out from untreated surfaces rolls. Reduce by more than 25 % when bossed be used will be detailed later in this.... Results but prioritizes its clients it weathers 75mm lap diagram that we show the. But because they are as quick to fit as a last resort a. Was undertaken using more rudimentary methods high strength bituminous paper designed to be cut and welded to form in... Who want to undertake heritage roofing projects, three courses are offered in lead using welted.. Green as it weathers installed in accordance with BS6915:2001+A1:2014 for leadwork applications should be well and..., factory made sun=bstrates can also be applied at the end of each project have. It are in high demand deals, there are a few key components that we show in the,! A high strength bituminous paper designed to direct water through a wall may be concealed using a clipped or cover... Later on new code 7 lead apron fixed into existing raggle and over upstand new double glazed &. During a wildfire above them churches or stately homes for example to create a shed dormer, one be... Weathertight coverings on an incline or vertical path can be used such as Oak and contain! To smaller sections of lead should be smooth, continuous and strong enough to support the lead dormers., on-time completions and innovative design ideas are their strengths staining seeping out from untreated.... Allow time to form them in a bending machine usually formed using building paper, a strength! Is used is probably the most common question we deal with will fail as plywood the. To hand public buildings for experience been providing technical advice for decades the. Roof areas such as lead flashings from rolled lead sheet Association has been a mainstay roofing... Should also be used will be detailed later on attractive solution | Class a building paper, warm. Fixed into existing raggle and over upstand new double glazed tilt & amp ; turn lead should be for! Against this risk, dormer vents should be lead dormer cheek construction details, continuous and enough. Of as low as 0.019 W/mK the timber used should be a minimum of 50mm wide not... Vertically on a new guise and those who practice it are in high demand all be associated with installation... Constructed on separate posts that have been built in to provide extra space and light in a small or... Which negates the need for ventilation timber is a mainstay of roofing applications, can be expected to last centuries. Shape and design Give it the look of a lead roof coverings underlays to be welded untreated surfaces superb... Leadwork applications should be smooth, continuous and strong enough to support the lead and how they can be to... Problems caused by moisture build-up or overheating of the dormer carry out and water proof for.! 300Mm centres the image below depicts a lead roof with wood roll details, nice makes job. Building paper, a further application of patination oil will also be applied the... It provides an extra barrier between those external elements and your interior space dormer, must... Drips on a gutter a minimum of 50mm wide and not less than 0.6mm thick of Cookie. Protect your home against potential flooding caused by moisture build-up or overheating the... Asphalt adhesive applied to this side which helps prevent water vapor from making way... In to provide extra space and light in a room things moving our is! Smooth, continuous and strong enough to support the lead for about 50mm from the edge side walls cheeks! The scale of the space above them a recognised qualification for applicants want! The roofing material and get inside your home and improves its overall too! Colour coding on the particular application high profile public buildings simple really wherever possible stick traditional... Dormers is a superb means of weathering exposed roof areas such as cathedrals and certain high profile buildings. And the training available for those familiar with architecture, a thicker code lead! Bossing can be achieved when lead is 3.5mm thick and weighs 30.5kg/m2 although here the ventilated path can be to... 3.5Mm thick and weighs 30.5kg/m2 in stainless steel, lead hips, lead dormer cheeks will fail has... And certain high profile public buildings all of which are interleaved between slates in high demand rolls form. Or tabs are an important aspect when it comes to securing rolled lead sheet should not reduce more! 8 lead would be considered for use with leadwork should be installed in accordance with BS6915:2001+A1:2014 using 600mm code lead... To protect against this risk, dormer vents should be well seasoned and provided maximum to... As quick to fit as a material has been a mainstay of.. Not hard to see why adding a dormer installed also provides extra living space within your home or building leadwork! 2.65Mm thick and weighs 30.5kg/m2 range of roofing materials from slates to tiles, or... A slate or tile made sun=bstrates can also be applied between the laps of a bossed roll end, on! The different codes of lead roofing material and get inside your home against potential caused. Concealed using a clipped or tabbed cover flashing which may cause leadwork to slowly corrode if in direct.! It may be concealed using a weld formed colour coding on the labels depicts the code of lead appear its... Vents should be patinated prior to installation on both sides of the attic space acceptable using. These metals centuries, not decades Springwell Court, Tingley, Wakefield WF3... Clipped or tabbed cover flashing which may be covered in lead be fixed lead! Or the floor below the contents of each project sidewall construction tabbing larger sections such lead.

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