How much should slates overlap Not more than one in four courses of battens should be joined over one truss for gauges over 200mm. SBS roll roofing overlap width is commonly 3. Water will blow in there, and rot the timber facia. Now it’s time to lay the roof membrane. 5 meters in length to allow sufficient thermal movement. Dry ridge packs are common in new build applications. The lead should be cut into sections no larger than 1. Roll roofing overlap - horizontal choose the overlap width according to the number of plies of roof to be installed: 2" or 3" (varies by manufacturer) or 16", 12" or 9" exposure for 2, 3, or 4 ply roofs respectively. For slates, the upstand should be approximately the batten depth + two thicknesses of slate (e. Alternatively, a continuous strip of underlay, at least 600 mm wide, can be laid along the valley. A shorter top slate is used at the ridge to compensate for the gauge and to ensure adequate ridge overlap, and to ensure that the minimum headlap is maintained. Size – Nominal (mm) 50mm Lap 65mm Lap 75mm Lap 80mm Lap 85mm Lap 600 x 300 11. Study with Quizlet and memorize flashcards containing terms like Clay tile roofing should have how much overlap?, What is the heaviest roof material per sq'?, Wood shingle/shakes should be spaced how far apart? and more. 6", varying by product, and also referred to as the selvage edge width. 7 Installation guidance The following information is for general guidance only. Roof valleys On roof valleys, ensure the breather membrane is extended by a minimum of 300mm on each side, measured from the centre of the valley. It is a vital measurement, which helps you work out the total area covered and how much of an overlap is needed across the individual slates. The thicker grade d slates should be laid at bottom of the roof and the thinner at the top. Use a 10mm strip behind the lower edge of the bottom board for support. , 25mm + 2 x 5mm). Values calculated using nominal sizes and incorporating a 5mm joint gap as per BS8000: part 6: 1990. If it is a straight up and over roof start at the verge Jul 15, 2024 · While slate size is the main factor, a few other things can influence the quantities needed: Overlap – The overlap between slates affects coverage. Your slate is 450mm in length with an overlap of 80mm. Oct 11, 2019 · Our plantation shutters come in 2 ½”, 3”, 3 ½” and 4 ½” slat sizes. If you are unsure ask your roofing merchant of the correct grade. Overlap subsequent boards by 40 – 50mm. At 3 or fewer inches, there should be no issue of coils fitting between the slats and causing coils to fail. Mix the glue and apply; 4. 2. I see warped pickets a lot on fences that don’t have a top rail or where pickets overhang the top rail by over 12” Feb 23, 2024 · So how do you get the spacing right with so much variation going on? Thankfully there is a very simple formula as follows: Length of slate (minus overlap) divided by 2 = batten gauge. In general, the recommendations apply to rafter lengths of not more than 9m in moderate driving rain exposures and 6m in severe driving rain exposures. Roof Pitch: Steeper roofs may require more slates for adequate coverage. Example. At a valley the underlay should overlap at the centre line by at least 300mm. As with a traditional slate roof, each slate in a Dutch Lap slate roof should be secured with two copper slating nails. End-lap Refers to the amount of overlap in a direction following the roof slope. It is a crucial aspect of installation on pitched roofs. Jan 8, 2025 · For the most part, a slate roof should last a lifetime and more. Nails should be either aluminium alloy or copper, silicone bronze or stainless steel in coastal areas. See full list on fixmyroof. 43 graus). So in fact its only about 1cm to 2cm less than the distance of top of slate to holes. Roof membrane . 80mm and 2. 24mm thickness. 100mm Black; 115mm Black; 125mm Black; 150mm Black; 100mm Primed; 115mm Primed; 125mm Primed; 150mm Primed May 2, 2016 · Hi guys, ive been searching around for the right nails for new slate roof but cannot seem to find the right nail for a 600x300 slate roof. The tables below show Minimum Recommended Head Laps. This is caused to some extent by the uneven top surface of an original timber moulding detail which is fixed to the top end of the facia board and has been weathered away over the years. Nail locations in a Dutch Lap shingle will be covered by the top and side laps of the slates and should be positioned as follows: 1 nail approximately ⅞” down from the top edge of The NHBC standard (the UK’s leading provider of warranty and insurance for new-built homes) indicates that the minimum pitch for a slate roof is 20 degrees subject to headlap (Section 7. While most standard-pitched residential roofs seldom exceed a 12:12 The pitch of a roof is the ratio used to determine how steep a roof is. It’s important you follow these guidelines as they will ensure that the finished roof is stable and secure. Take the overlap length from the overall slate length to give you 370mm. When deciding how much slate you need for your roof, you will need to consider; the pitch of the roof, whether the slates are pre-holed, as well as know the required overlap. Lay slates; 5. To ensure this, the battens should be at least 1. Mar 14, 2024 · 1 - you can put either standard A1F building paper or Geotec. At a hip, take the underlay from the first side around the corner, and overlap from the second side by at least 150mm (6 inches). Slate Nails Slate Nails, also known The mortar should ideally be removed from the brickwork course that sits around 150mm above the roof. Slate is heavy and sensitive to scratching; Calibrated or crushed on both sides; Step-by-Step Guide. Step 3: Fixing the Roof Tiles Dec 6, 2022 · How Much Should Roof Tiles Overlap? Your tiles should overlap one another by between 75mm and 100mm, depending upon their size as well as the pitch of your roof. For example; for a 500 mm length slate installed with a 80mm lap, the batten gauge would be: (500 – 80) / 2 = 210 mm. Joseph Jenkins, Inc. 9 12. 19: Table 12). My question is how much spacing should I allow between the vertical boards? The amount by which roofing tiles, slates, shingles, flashings, etc overlap each other to achieve waterproofing. Begin at the bottom, ensuring that the first board is level. The final covering of tiles or slates will provide a secure fixing. 3 - minimum you want to allow is 150mm Jun 15, 2024 · Roof pitch – The angle of a roof not only determines what slates to use, but the amount of overlap that the slate roof needs to remain waterproof. See fixing battens. For sure, some gaps ended up closer to 1/4” for me. Shingle overhang shouldn't be more then 3/4". The pitch is the ratio based on the rise of the roof (vertical measurement) compared to the run (horizontal measurement). 2 - cooper nail in the top 150mm of lead sections ( no sections longer than 1. Nails should be either aluminium alloy to BS 1202: Part 3: 1974 or copper to Part 2: 1974, or stainless steel. 43 degrees). How do you calculate m2 of a roof? To calculate your roof area, simply multiply your roof length by your roof slope height, and multiply this by two. The standard is approximately 32-35 mm. 4). Double-lap slates without nail holes should be fixed by hooks engaged on the centre of the tail of the slate. Mar 27, 2021 · How much should slates overlap? On a slate roof this is the critical overlap and is necessary to prevent water penetration and leakage. It is important not to reduce the recommended overlap. If you can understand the Nov 4, 2021 · The basic recommendation is that adjacent slates be placed tightly together, but not so tight as to overlap, as overlapping of the vertical edges of adjacent slates can subject the slate to premature breakage2. 2m long. On average, for standard 600mm x 300mm slates, you'll need approximately: Project specific advice on your required roof pitch, slate size and head lap is available from the Welsh Slate technical department. What type of nail do I need, does it have to be copper or is corrosion resistant galvanised good enough? Also how much should the slates overlap? lesser grade s may require more thicknesses. slates with the reduced length), these should be laid first, beginning with a one-and-a-half slate to create a staggered pattern, (have slates less than 150mm should not be used). This method could cause problems. Slating terms and phrases – If you are not a seasoned roofer, some of the terms used for slates, batten spacing or overlapping of the slates can add to the confusion. Use these charts to assist with selecting the correct Head Laps for you. Firstly, put the hooked end of the slate ripper underneath the damaged slate, trapping the nail in the hook. Double-lap slates. To replace a slate on a slate roof, you’ll require a slate ripper, tin snips, and a hammer, as well as a new slate and a strip of lead. They play a significant role in providing weather protection and preventing water from entering the roof. Next, it’s 370 divided slate to what the gauge of the slates are ,using a blue chalk line strike a line across and this will give you a mark to keep the slates straight. While most standard-pitched residential roofs seldom exceed a 12:12 From your chosen size of slate and headlap, calculated using our headlap tables, use this coverage table to calculate how many slates per m 2 your roof will require. Prepare underground; 3. Jun 21, 2021 · Take your first Feather Edge board and sit it on the gravel board with the thick edge flush with the left face of your first post and nail in position using your 40mm nails. Sep 28, 2018 · How much should slates overlap? On a slate roof this is the critical overlap and is necessary to prevent water penetration and leakage. A larger gauge (less exposed) uses more slates per m2. Ridge. Here are some steps to felting a shed roof! 1. Laying slates - made easy. The mortar is best removed using a mortar raking desk or similar tool, but can also be done with a hammer and chisel, and should be removed to a depth of around 15-20mm. The nails should be approx 20mm in from the LH side and one should be driven in at the centre of the 3 Arris rails. 14 CEDRAL SLATES FIIN IDE VISIT CEDRAL. Key Points. 5 12. the top part of each slate is covered by two slates, the centre of the slate of the next row and the lower part of the slate above that). Marley Modern tiles are designed for roof pitches of 16º and above and are supplied standard with. The spacing of the slats is to keep the mattress from being damaged and providing proper support to the sleeper. The most popular slate size in Southern England is 500 x 250mm, and 400 x 250mm in the North of England and Scotland. It's pretty standard design: posts about 8 feet apart, two 2x4 for supports horizontal between posts, then vertical cedar boards screwed into the 2x4s. Keeping this in view, how much does board on board fence cost? Board on board fence panels, 6 feet tall, cost between $11 and $16 per panel. A common short cut is not to cut the full slate but to turn it around and lay it along its length, so that the under-eave will then be 250mm rather than 288mm. Too low, and nails will be under-driven, meaning they will stick out above the top of the shingle. Dec 28, 2023 · Slate Size: Larger slates cover more area, reducing the number needed. 25 degrees: 85 mm. course of slates also oversails the gutter 50-55mm. Tot i que la majoria de teulades residencials amb inclinació estàndard rarament superen una inclinació de 12:12 (45 graus), el paisatge de vegades està marcat per un disseny que es remunta a èpoques anteriors, quan eren més freqüents les inclinacions del sostre molt The clean and precise slate-like appearance of the tiles is enhanced by the necessary broken-bond tiling technique on the roof. They should be 20 to 25 mm longer than two thicknesses of slate, but longer nails should be used at the eaves course especially if a sprocket is used. If the pressure is set too high, the gun will overdrive the shingle, causing it to sink into the mat. Try to ensure they are above the line at which the second length of membrane will overlap. This is normally specified with the tile manufacturer and it’s advisable to check how much they say a roof tile should overlap, normally on a smooth faced tile the overlap is 75mm (3″) and on granular or sandfaced tiles its 100mm (4″) however if the roof is shallow pitched, is facing a windy direction or will be prone to moss build up, it All roof coverings slates/ tiles ect shud sit central in gutters. Working Hours. Continue up the roof laying lengths of breather membrane. Apr 26, 2017 · So therefore the answer to my question is easy the top slate needs to overlap so its holes are just higher than the slate underneath it so you can nail into the same batten the top of the slate underneath rests on. A larger overlap means fewer slates per m2. Jan 18, 2019 · The use of slate-and-a-half slates is recommended at the valley to ensure secure fixing of the slate. Whether using slates, plain tiles or interlocking tiles, the first course at eaves should be the full tile or larger slate cut. These are the main factors. To less the water can drip back behind the gutter with wind blowing that direction. Nov 7, 2023 · However, debris should be prevented from entering at this point. A flashing needs to overlap the joint with another surface by a minimum of 150mm where the abutting roof is sloping with 50% of the overlap distance going up the wall vertically. ) OSHA defines a “steep roof” as any roof with a rise/run ratio over 4:12 (18. Fill in the joints; If you lay slates, you start with the design before the actual laying work. For hip and ridge slate in a saddle pattern, or similar method of hip and ridge slating, once the size of hip and ridge slate is determined and the number of linear feet of hip and ridge calculated, it is common to allow a 50 percent overlap of the pieces to be installed and allocate the same number of pieces of slate for each side of the hip Dec 18, 2023 · For the majority of common roof pitches, upstands totaling between 35mm and 50mm work for most interlocking tiles depending on their thickness, and around 55-65mm for plain tiles. This layout gives a double lap covering, (i. com Traditional Roofing • 2007 5 installed in ice-dam prone areas of the roof, such as along eaves. Lead sheet for lead flashing should be no longer than 1. The overlap will depend upon the slope of the roof - the steeper the slope, the smaller the overlap required. To ensure The under-eave slate should be cut to the correct length, for example, a 500×250 slate laid to a 75mm headlap should be cut to 288mm long (gauge + lap). , 143 Forest Lane, Grove City, PA 16127 USA (866) 641-7141 • traditionalroofing. Flashing will start from underneath the roof and bend down and overlap the back of the gutter. For an all foam mattress, 3 or fewer inches ensures that the foam will not fall or sag through the open space. How much should underlayment overlap on hips for proper installation? On 2022-06-06 Reply by InspectApedia-911 (mod) - Proper Roof Underlayment Overlap at Hips & Ridges is 4-inches @Brooke, Roofing manufacturers such as GAF recommend that at roof hips the felt should be overlapped at least 4-inches. French tiles are typically installed in a single thickness and have a 3″ roof tile overlap. However, individual slates could become worn down beyond repair or break and need replacing much sooner. National Slate Association. Slates should also have a minimum sidelap from the centerline of nail holes of 1½ to 2 inches. Bend a welt into the lead 25mm How Much Should Roof Tiles Overlap? Your tiles should overlap one another by between 75mm and 100mm, depending upon their size as well as the pitch of your roof. If you'd like a taller fence, closer to 8 feet, your fence panels will cost between $21 and $23 per panel. The roof pitch typically relates to the required head lap as follows: 20 degrees: 115 mm minimum head lap. Standard Half Round . Sep 28, 2018 · The pressure on the gun should be set correctly before use. OSHA defines a “steep roof” as any roof with a rise/run ratio over 4:12 (18. The Slate Roof Tiles Calculator is a practical tool designed to help homeowners, contractors, and roofing professionals accurately estimate the number of slate tiles needed for a roofing project. At least 30mm needs to be tucked into the chase. If the run is long, you may need flashing to cover the exposed part of the facia. Generally, the recommendations given on the headlap tables should be followed for rafter lengths of not more than 9m in driving rain exposures of less than 56 L/m2 per spell and 6m in driving rain exposures of 56 L/m2 per spell or greater (BS 5534:2014 section 5. 4" or 3. Roof Batten Spacing for Slates. In terms of size, most French tiles are 9″ -13″ wide and 11″-16″ long. How much should slates overlap? Side lap gap – The gap between abutting slates should be between 1 – 5mm, most people these days quote 3mm, up to a maximum of 9mm for fibre cement slates. 65 East Main Street, Falconer, NY 14733. Different roof types require different application methods. We would like to show you a description here but the site won’t allow us. Simply use the formula below: Length of Slate – Headlap / 2 = Batten Spacing for Slates. Overlap: Slates must overlap to prevent water ingress, influencing the total count. The recommendations for minimum pitches and laps for slate apply to normal situations. The minimum sidelap between slate edges is 3 inches. At a hip the underlay should overlap at the hip line by at least 150mm. should be made to the LSA’s publication entitled ‘The Complete Manual’ which covers the many applications of lead sheet in building. You can determine the total number of tiles required, including waste, by inputting key parameters to complete your roofing project efficiently. Batten Spacing for Cedar Shingles. There should be a drip edge over the fascia top. I've just tried to clear our uPVC guttering of leaves and other debris. About. The batten spacing for cedar shingles should be the standard batten gauge plus half the thickness of your battens. Nov 16, 2023 · A ‘head lap’ refers to the overlap or covering of the upper portion (head) of one roofing tile or slate by the lower portion of the tile above it. Average Slate Requirements General Estimates. Note: Ensure nails are not long enough to puncture membrane/felt. So, in case you were wondering ‘how much should roof tiles overlap’, you now have your answer for this particular type. Lead sheet is a proven, long-life building material. Don't assume that the gutter is already sloping to the spout. The avalanche roofs have snow cleats to keep the white stuff aloft, so snow shouldn't be an issue if your roof setup is correct. 5m). 01480 302500. Gauge – This refers to the exposure of each slate. Lead Roof Flashing Length. Jun 27, 2007 · Where the slates overlap the gable end there is a small gap between the underside of the slates and the top of the facia board. If there is no ridge ventilation, the breather membrane should go over the ridge, and overlap each side of the ridgeline by the required overlap. Side-lap Refers to the overlap in a sideways or horizontal direction. Any twisted or broken slates should be set aside for cutting down for undereaves, top pers and other cuts , this will help minimising the amount of wastage on the project. IE R CALL +353 (0) 59 863 1316 FR MRE INFRMATIN 15 Introduction • All slates should be fixed in accordance with SR82, BS5534 and BS8000-6. uk Undereave slates must be at least 3 inches wider than the exposure of the field slates used at the eave line (4 inches wider for slopes less than 8:12; 2 inches wider for slopes of 20:12 or greater) to maintain the minimum required headlap. Overall, it is standard and recommended practice for roof felt to integrate with the guttering system. At a monopitch ridge the underlay should extend over the top fascia or masonry by a minimum of 100mm. To forward with torrential rain it may go over front gutter. If you install your rails properly (1 at very top of pickets , 1 in middle, 1 within 8” of the ground) you really shouldn’t see too much picket warping. Sort and distribute; 2. In general, though, slate roofs are long-lasting. e. These verge slates require pre drilled holes for three nail and two rivet Jan 15, 2024 · ©2025 Home Inspection Insider 898 Whispering Pines Rd, Johnsonville, SC 29555 843-250-1882 overlap, as overlapping of the vertical edges of adjacent slates can subject the slate to Slate Association, 2010, pages 50 and 207-208, respectively. The sidelap is the separation between vertical joints in adjacent courses. Nov 9, 2016 · Battens should be fixed to rafters set at centres not more than 600mm apart, unless determined by calculation and should span across at least three rafters. While most standard-pitched residential roofs seldom exceed a 12:12 OSHA defineix un "sostre escarpat" com qualsevol sostre amb una relació de pujada/marcha superior a 4:12 (18. g. For flat roofs, the lead which pays on the flat roof should be at least 200mm. Roof felt should overlap with the gutter to seal and drain water; 50-150 mm overlap is typical; Prevent debris buildup where felt enters the gutter; Our Opinion You should ensure you buy lead of a sufficient grade/code for valley applications. The measurement for the cover or overlap onto the roof is also usually 150mm, but again, if you are considering increasing or decreasing the measurement, you should take into account the pitch of the roof, weather exposure and aesthetics. Sep 6, 2015 · Shingled roofs with mineral granules, not so much. The design of the product when fitted on top of the tile or slate battens will cause this effect. Keep a 5mm gap between each slate (to allow for natural expansion in the slate roof structure) so they are not completely rigid. Long runs should be split to opposing downspouts. In fact, a modern slate roof should last for 125 years or more. 7 Once all the underlay and battens have been ﬁxed into place cut the eaves slates to a length of 300mm by using a hand saw or similar. Nail heads should be flush with the top of the shingle. 3 12. (3) In order to provide the correct bond the verge slate on alternate courses should be a slate and a half width cut from a double slate. How much should slates overlap? On a slate roof this is the critical overlap and is necessary to prevent water penetration and leakage. While most standard-pitched residential roofs seldom exceed a 12:12 pitch (45 degrees), the landscape is occasionally marked by a design which harkens back to earlier times, when much greater roof pitches were more common. It acts in the same way as a swept verge and encourages the water to run away from the roof joint. How to felt a shed roof. Coverage of slates See table 2 for coverage of all slate sizes at different laps. • Slates should be laid broken bond using slate-and-a-half width slates in alternate courses formed from double width slates at verges, hips, valleys and abutments. We offer this range of slat sizes so you can completely customize the look of your shutters to complement your windows. Then hammer the handle of the slate ripper, to force the nail out of place. Mar 17, 2022 · Factors that determine the cost of slate roofing Roof installation vs repair vs restoration. Toggle navigation 01248 600656 How much overlap is required? Once you know the pitch, check your slate manufacturer’s specifications to see how much overlap is recommended. 5 metres. It is extremely malleable and can be readily dressed to fit the multi-curved contours of many modern building materials, particularly roofing tiles. 6 12. The roof pitch typically relates to the required head lap as follows: 20 מעלות: 115 מ"מ מינימום חיק ראש. Clean the slates; 6. Monday – Friday, 8:30 AM – 4:30 PM Saturday – Sunday: Closed Mar 19, 2008 · I took some measurements (via hanging out a velux window) of exposed slates which varied between each row (of the 3 or four I could measure) from 65mm to 80mm, I then attempted to do the riskier measurement of measuring a full length tile from the edge but as I was pulling out the ladder from the garden hut I came accross a pile of excess Batten Gauge = (length of slate – lap) / 2. Jan 20, 2015 · Roofing What's the minimum gap between outer edge of gutter and roof tiles? Anonymous user 3 March 2024 - 3. This should mean that the gauge of your roofing battens will be around 32-35cm, measuring from the top of one batten to the top of the one below it. We recommended the addition of at least 5% wastage allowance. How much should roof tiles overlap? They should overlap 75mm to 100mm, based on tile size, roof pitch, and with roofing battens measuring 32-35cm. This should be between 1. co. The designer and fixer should ensure that tiles are installed in accordance with BS 5534: The British Standard Code of Practice for Slating and tiling. A new slate roof will cost between £4,000 and £15,000 as outlined in the table above. Calculate the batten gauge for natural slate in the UK, to British Standard BS 5534 and follow the steps to design a natural slate roof. The tails of all three courses of slate align and overhang the gutter. Jul 7, 2018 · I'm replacing a fence in my yard. 1. Make sure that all folds are done so that no pockets are left where water could collect. All work on site should be carried out in accordance […] Fix your under eaves course (e. May 23, 2017 · For roof pitches of 60° and above, including vertical, two nails should be used to fix every tile. A slight gap of 1/16” to 1/8” between adjacent slates (roughly equivalent to the point of a slate hammer) is recommended. Manufacturer’s instructions state the amount of overlap required between each length of breather membrane. 5. Calculating the batten spacing for roof slates is thankfully quite easy. The first step when looking to felt a shed roof is to remove any existing old roofing felt, in order to create a clean surface on which you can fix the new felt rolls. Local conditions and current good practice should also be considered. 14 PM. Preparation. Bell-cast or sprocket eaves Slope the gutter down form there towards the spout. 25 מעלות: 85 מ"מ. Double-lap slates should have a minimum of two nails to every slate when centre nailed. sfre xllc ymgm koc ddzuwl seshtw edcieyw xhfvfxh wcabz jvwv pdnvkfyx qvme gzbvt sbzg pqbyll