{"id":28553,"date":"2025-06-18T09:41:15","date_gmt":"2025-06-18T07:41:15","guid":{"rendered":"https:\/\/shop.profiness.de\/c\/"},"modified":"2025-11-05T11:26:48","modified_gmt":"2025-11-05T10:26:48","slug":"c","status":"publish","type":"page","link":"https:\/\/shop.profiness.de\/en\/questions-and-answers-faq-section\/c\/","title":{"rendered":"c"},"content":{"rendered":"\n<div style=\"height:31px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h1 class=\"wp-block-heading\"><strong> FAQ on mounting with hanger bolts<\/strong><\/h1>\n\n<style>.faq-container {\n  max-width: 900px;\n  margin: 0 auto;\n  font-family: system-ui, sans-serif;\n}\n.faq-container details {\n  border: 1px solid #ccc;\n  border-radius: 8px;\n  margin-bottom: 10px;\n  padding: 10px 15px;\n  background: #f9f9f9;\n  transition: all 0.3s ease;\n}\n.faq-container details[open] {\n  background: #eef7ff;\n  border-color: #3399ff;\n}\n.faq-container summary {\n  font-weight: bold;\n  cursor: pointer;\n  outline: none;\n  font-size: 1.05rem;\n}\n.faq-container summary::-webkit-details-marker {\n  display: none;\n}\n.faq-container summary::before {\n  display: none;\n}\n.faq-container p {\n  margin: 10px 0 0 0;\n  line-height: 1.5;\n  font-size: 0.95rem;\n}\n<\/style><div class=\"faq-container\"><details id=\"frage-1\"><summary><strong>1. F\u00fcr welche Dacharten sind Stockschrauben geeignet?<\/strong><\/summary><p>Stockschrauben eignen sich f\u00fcr D\u00e4cher mit Wellblech, Trapezblech, Sandwichplatten, Welleternit und Bitumenschindeln. Entscheidend ist eine tragf\u00e4hige Holz- oder Stahlunterkonstruktion.<\/p><\/details><details id=\"frage-2\"><summary><strong>2. Was ist der Unterschied zwischen Stockschraube und Solarbefestiger?<\/strong><\/summary><p>Stockschrauben sind i.d.R. nur f\u00fcr Holzunterkonstruktionen geeignet. Solarbefestiger gibt es auch mit Feingewinde f\u00fcr Stahltr\u00e4ger \u2013 ideal f\u00fcr Metallunterkonstruktionen. Es gibt jedoch auch beide Schraubenkategorieren f\u00fcr verschiedenste Untergr\u00fcnde.<\/p><\/details><details id=\"frage-3\"><summary><strong>3. Wie finde ich die richtige Schraubenl\u00e4nge?<\/strong><\/summary><p>Die L\u00e4nge h\u00e4ngt ab von Sickenh\u00f6he, Aufbauh\u00f6he, ggf. D\u00e4mmung und der Rahmenst\u00e4rke der Module. Wichtig ist, dass das Schraubengewinde vollst\u00e4ndig im Tr\u00e4ger verschraubt wird (bei Holztr\u00e4gern ca. 7 cm).<\/p><\/details><details id=\"frage-4\"><summary><strong>4. Wo muss ich die Stockschrauben montieren?<\/strong><\/summary><p>Immer auf der Hochsicke\/Wellenberg, m\u00f6glichst mittig auf der Pfette oder einem Stahlprofil. So werden statische Kr\u00e4fte optimal \u00fcbertragen und die Dichtigkeit sichergestellt.<\/p><\/details><details id=\"frage-5\"><summary><strong>5. Wie bohre ich richtig vor?<\/strong><\/summary><p>F\u00fcr Holz: mit einem 7 mm Bohrer bei M10-Schrauben. F\u00fcr Stahltr\u00e4ger h\u00e4ngt die Bohrweite von der Dicke ab (z.\u202fB. 6,8 mm bei 1,5\u20135 mm Stahl).<\/p><\/details><details id=\"frage-6\"><summary><strong>6. Muss ich die Kalotte immer verwenden?<\/strong><\/summary><p>Bei Welleternit- oder Faserzementd\u00e4chern ist die Kalotte zwingend notwendig f\u00fcr die Abdichtung und Statik. Bei Stahlprofilen kann sie optional sein, je nach Schraubentyp.<\/p><\/details><details id=\"frage-7\"><summary><strong>7. Wie wird die Dichtung richtig montiert?<\/strong><\/summary><p>Die untere Mutter wird so angezogen, dass die EPDM-Dichtung satt aufliegt, aber nicht gequetscht wird. So ist das Bohrloch zuverl\u00e4ssig abgedichtet.<\/p><\/details><details id=\"frage-8\"><summary><strong>8. Was mache ich, wenn ich Sparren statt Pfetten habe?<\/strong><\/summary><p>Die Montage auf Sparren ist schwieriger, da sie nicht immer unter der Hochsicke verlaufen. Eine sichere Verbindung ist nur m\u00f6glich, wenn die Sparren parallel zur Sicke verlaufen. Alternativ kann man mit Br\u00fccken arbeiten.<\/p><\/details><details id=\"frage-9\"><summary><strong>9. Wie verhindere ich das Eindringen von Wasser?<\/strong><\/summary><p>Die Schraube muss exakt senkrecht eingebaut werden, mit sauber sitzender Dichtung. Optional kommen Kalotten oder Ersatzbleche zum Einsatz, z.\u202fB. bei Bitumen oder Eternit.<\/p><\/details><details id=\"frage-10\"><summary><strong>10. Kann ich die H\u00f6he der Module justieren?<\/strong><\/summary><p>Ja. Die Mutterposition kann variiert werden, um eine plane Tr\u00e4gerfl\u00e4che herzustellen \u2013 ideal bei unebenen D\u00e4chern.<\/p><\/details><\/div>\n\n<div class=\"faq-container\">\n\n<details id=\"frage-11\">\n  <summary><strong>11. Will the roof remain permanently watertight with the hanger bolts?<\/strong><\/summary>\n  <p>Yes \u2013 when installed correctly with a rubber seal, dome cap and the correct torque, the roof penetration will remain permanently rainproof.<\/p>\n<\/details>\n\n<details id=\"frage-12\">\n  <summary><strong>12. What materials are used for the screws?<\/strong><\/summary>\n  <p>Hole-in-the-wall screws are made of A2 stainless steel. Nuts and washers are also made of stainless steel, while the sealing washer is made of UV-resistant rubber. <\/p>\n<\/details>\n\n<details id=\"frage-13\">\n  <summary><strong>13. Can I also use the system on bitumen or fibre cement roofs?<\/strong><\/summary>\n  <p>Yes. Calottes are used here, with an EPDM flange plate or replacement sheet metal if necessary. It is important to ensure a secure seal with a dimensionally stable contact surface.  <\/p>\n<\/details>\n\n<details id=\"frage-14\">\n  <summary><strong>14. How do I ensure that the screw is straight?<\/strong><\/summary>\n  <p>The hole should be drilled perpendicular to the roof surface. Use a drilling aid or align the screw visually using the roof surface as a guide. <\/p>\n<\/details>\n\n<details id=\"frage-15\">\n  <summary><strong>15. What load can a hanger bolt withstand?<\/strong><\/summary>\n  <p>Depending on how it is embedded in the wood, a hanger bolt can absorb tensile forces of over 1 kN. The screw-in depth and wood quality are decisive factors. <\/p>\n<\/details>\n\n<details id=\"frage-16\">\n  <summary><strong>16. Are there different screw lengths?<\/strong><\/summary>\n  <p>Yes. PROFINESS offers various lengths from 180 mm to 400 mm and with diameters of M10 or M12 \u2013 depending on the roof structure, insulation thickness and corrugation height. <\/p>\n<\/details>\n\n<details id=\"frage-17\">\n  <summary><strong>17. How does the height adjustment on the screw work?<\/strong><\/summary>\n  <p>The lock nuts allow the support height to be adjusted with millimetre precision. This ensures an exact contact surface even on uneven roofs. <\/p>\n<\/details>\n\n<details id=\"frage-18\">\n  <summary><strong>18. Is the system compatible with all mounting rails?<\/strong><\/summary>\n  <p>Yes. The threaded rod (M10 or M12) can be combined with all standard PV mounting rails. Adapter plates connect the screw and rail.  <\/p>\n<\/details>\n\n<details id=\"frage-19\">\n  <summary><strong>19. How many screws do I need per module?<\/strong><\/summary>\n  <p>Usually four \u2013 two per rail. The number may vary depending on the wind load zone and module size. Static preliminary planning is recommended.  <\/p>\n<\/details>\n\n<details id=\"frage-20\">\n  <summary><strong>20. Can I reuse the screw?<\/strong><\/summary>\n  <p>Yes, careful dismantling allows for reuse \u2013 provided that the components were not damaged during dismantling.<\/p>\n<\/details>\n\n<\/div>\n\n<div class=\"faq-container\">\n\n<details id=\"frage-21\">\n  <summary><strong>21. How is the rail mounted on hanger bolt systems?<\/strong><\/summary>\n  <p>The rails are mounted perpendicular to the corrugated or trapezoidal structure \u2013 parallel to each other. They rest on the adapter plates, which are connected to the hanger bolts and fixed in place there. <\/p>\n<\/details>\n\n<details id=\"frage-22\">\n  <summary><strong>22. What is an adapter plate or flange plate?<\/strong><\/summary>\n  <p>A flange plate connects the hanger bolt to the mounting rail. It serves to distribute the load and as a fixing point for the respective screw connection. <\/p>\n<\/details>\n\n<details id=\"frage-23\">\n  <summary><strong>23. Are there adapters with slotted holes for height adjustment?<\/strong><\/summary>\n  <p>Yes. Flange plates with slotted holes and height adjustment on the hanger bolt allow for compensation for uneven roofs or different purlin heights. <\/p>\n<\/details>\n\n<details id=\"frage-24\">\n  <summary><strong>24. How can I create row extensions or rail joints?<\/strong><\/summary>\n  <p>With suitable rail connectors. These are inserted into the rails and secured with two screws \u2013 load-bearing and electrically conductive. <\/p>\n<\/details>\n\n<details id=\"frage-25\">\n  <summary><strong>25. Is the system suitable for single module installation?<\/strong><\/summary>\n  <p>Yes, the hanger bolt solution is particularly suitable for compact systems with 1\u20134 modules, especially for carports, garages or garden sheds.<\/p>\n<\/details>\n\n<details id=\"frage-26\">\n  <summary><strong>26. Which rails are compatible with hanger bolts?<\/strong><\/summary>\n  <p>All standard aluminium rails with underside for M10 screw connections. Profiness mounting rails are compatible with hanger bolt mounting. <\/p>\n<\/details>\n\n<details id=\"frage-27\">\n  <summary><strong>27. Is there a minimum height between the module and the roof surface?<\/strong><\/summary>\n  <p>As a rule, there should be at least 3.5 cm between the module and the roof to allow for rear ventilation. This is determined by the nut height and adapter. <\/p>\n<\/details>\n\n<details id=\"frage-28\">\n  <summary><strong>28. Can I also screw the screw into bricks or concrete?<\/strong><\/summary>\n  <p>No. Coffin bolts are only suitable for wood and, if necessary, steel substructures. Special roof hooks or bolt anchors are provided for brick or concrete.  <\/p>\n<\/details>\n\n<details id=\"frage-29\">\n  <summary><strong>29. Are there different thread diameters?<\/strong><\/summary>\n  <p>Yes. The standard hanger bolts are M10 or M12. M10 is standard for PV, M12 for higher load requirements or larger profiles.  <\/p>\n<\/details>\n\n<details id=\"frage-30\">\n  <summary><strong>30. What should you do if there is no rafter in the desired position?<\/strong><\/summary>\n  <p>In such cases, the rail system should be offset accordingly or an auxiliary piece of wood should be attached. Screw connections outside load-bearing substructures are not permitted. <\/p>\n<\/details>\n\n<\/div>\n\n<div class=\"faq-container\">\n\n<details id=\"frage-31\">\n  <summary><strong>31. What do I need to bear in mind in snow load zones?<\/strong><\/summary>\n  <p>Depending on the snow load zone, shorter screw spacing and, if necessary, additional screws per rail may be required. A static design by PROFINESS is recommended. <\/p>\n<\/details>\n\n<details id=\"frage-32\">\n  <summary><strong>32. How does the system react to strong wind loads?<\/strong><\/summary>\n  <p>The screws transfer the forces directly into the supporting structure. It is important to use a sufficient number of correctly positioned screws and a stable substructure. <\/p>\n<\/details>\n\n<details id=\"frage-33\">\n  <summary><strong>33. Can I install corrugated sheets without purlins?<\/strong><\/summary>\n  <p>No. Installation without a supporting substructure (e.g. wooden purlins) is not permitted. Corrugated sheets alone do not offer sufficient load-bearing capacity.  <\/p>\n<\/details>\n\n<details id=\"frage-34\">\n  <summary><strong>34. What happens if I accidentally drill next to the rafters?<\/strong><\/summary>\n  <p>The hole must not be reused. The hanger bolt would not hold securely. The screw point must be moved and the old hole sealed.  <\/p>\n<\/details>\n\n<details id=\"frage-35\">\n  <summary><strong>35. Do I need to tighten the screws to a specific torque?<\/strong><\/summary>\n  <p>Yes. The tightening torque is typically 15\u201320 Nm. A torque wrench ensures uniform preload and sealing effect.  <\/p>\n<\/details>\n\n<details id=\"frage-36\">\n  <summary><strong>36. Can I also use a cordless screwdriver to tighten the screws?<\/strong><\/summary>\n  <p>Yes \u2013 with torque limitation or subsequent check with a torque wrench. Slow tightening prevents overheating and damage to the seal. <\/p>\n<\/details>\n\n<details id=\"frage-37\">\n  <summary><strong>37. Is there a documentation requirement for the screw connection?<\/strong><\/summary>\n  <p>For larger installations or public projects, installation documentation is recommended. Profiness can prepare the relevant planning documents for each specific project prior to installation. <\/p>\n<\/details>\n\n<details id=\"frage-38\">\n  <summary><strong>38. Can I mount on sandwich roofs with hanger bolts?<\/strong><\/summary>\n  <p>Yes \u2013 if the lower base layer is made of wood. For steel profiles, a different type of screw may need to be used. Important: Pre-drill through top layers + ensure secure sealing.  <\/p>\n<\/details>\n\n<details id=\"frage-39\">\n  <summary><strong>39. Are there alternatives to hanger bolts?<\/strong><\/summary>\n  <p>Yes \u2013 e.g. direct screw connection to trapezoidal sheet metal, roof hooks for tiled roofs or mounting systems for flat roofs. The choice depends on the type of roof.<\/p>\n<\/details>\n\n<details id=\"frage-40\">\n  <summary><strong>40. Where can I find installation examples or photos?<\/strong><\/summary>\n  <p>In the <a href=\"https:\/\/www.profiness.de\/downloads\/kataloge\" target=\"_blank\" rel=\"noopener\">download area<\/a> of the PROFINESS website, in the assembly instructions or on request directly from customer service.<\/p>\n<\/details>\n\n<\/div>\n\n<div class=\"faq-container\">\n\n<details id=\"frage-41\">\n  <summary><strong>41. What should you do if the screw is loose or not tight?<\/strong><\/summary>\n  <p>The wood is probably torn or too soft. The screw must not be used again. Please choose a new position and seal the old hole.  <\/p>\n<\/details>\n\n<details id=\"frage-42\">\n  <summary><strong>42. Are there lag screws with double flanges or height compensation?<\/strong><\/summary>\n  <p>Yes. PROFINESS also offers height-adjustable hanger bolts for precise level compensation on sloping or uneven roofs. <\/p>\n<\/details>\n\n<details id=\"frage-43\">\n  <summary><strong>43. Can I order replacement parts for hanger bolts individually?<\/strong><\/summary>\n  <p>Yes. Sealing discs, nuts, caps and flange plates are also available individually in the shop or on request \u2013 ideal for repairs or retrofitting. <\/p>\n<\/details>\n\n<details id=\"frage-44\">\n  <summary><strong>44. How do I dispose of old screws or damaged seals correctly?<\/strong><\/summary>\n  <p>Metal parts (screws) can be disposed of in the metal container, EPDM seals in the residual waste.<\/p>\n<\/details>\n\n<details id=\"frage-45\">\n  <summary><strong>45. Are there black or coloured screw components?<\/strong><\/summary>\n  <p>On request, yes \u2013 individual components such as nuts, flanges or EPDM covers are also available in black for a harmonious overall appearance.<\/p>\n<\/details>\n\n<details id=\"frage-46\">\n  <summary><strong>46. How quickly can hanger bolts be delivered?<\/strong><\/summary>\n  <p>PROFINESS keeps standard lengths in stock at all times. Delivery usually takes place within 1\u20132 working days after ordering \u2013 even for larger quantities. <\/p>\n<\/details>\n\n<details id=\"frage-47\">\n  <summary><strong>47. Is technical advice available for special roofs or difficult substrates?<\/strong><\/summary>\n  <p>Yes \u2013 our customer service team can assist with special solutions. Send us pictures and information about the roof construction and we will help you make the best choice. <\/p>\n<\/details>\n\n<details id=\"frage-48\">\n  <summary><strong>48. Do I have to report my installation to my insurance company or network operator?<\/strong><\/summary>\n  <p>Not the screw connection itself. However, the PV system must be registered with the grid operator and, if necessary, reported to the building insurer. <\/p>\n<\/details>\n\n<details id=\"frage-49\">\n  <summary><strong>49. Is there an overview in the form of an assembly video?<\/strong><\/summary>\n  <p>Yes, PROFINESS is planning a series of videos for DIY and professional installation. The first clips are already available on YouTube or can be obtained from Support on request. <\/p>\n<\/details>\n\n<details id=\"frage-50\">\n  <summary><strong>50. Where can I find technical data, downloads and documentation?<\/strong><\/summary>\n  <p>All relevant information can be found in the <a href=\"https:\/\/www.profiness.de\/downloads\/kataloge\" target=\"_blank\" rel=\"noopener\">download area<\/a> at www.profiness.de, in the shop under the products or on request directly from our customer service.<\/p>\n<\/details>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>FAQ on mounting with hanger bolts 1. F\u00fcr welche Dacharten sind Stockschrauben geeignet? Stockschrauben eignen sich f\u00fcr D\u00e4cher mit Wellblech, Trapezblech, Sandwichplatten, Welleternit und Bitumenschindeln. Entscheidend ist eine tragf\u00e4hige Holz- oder Stahlunterkonstruktion. 2. Was ist der Unterschied zwischen Stockschraube und Solarbefestiger? Stockschrauben sind i.d.R. nur f\u00fcr Holzunterkonstruktionen geeignet. Solarbefestiger gibt es auch mit Feingewinde f\u00fcr [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"parent":28665,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-28553","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/shop.profiness.de\/en\/wp-json\/wp\/v2\/pages\/28553","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/shop.profiness.de\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/shop.profiness.de\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/shop.profiness.de\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/shop.profiness.de\/en\/wp-json\/wp\/v2\/comments?post=28553"}],"version-history":[{"count":1,"href":"https:\/\/shop.profiness.de\/en\/wp-json\/wp\/v2\/pages\/28553\/revisions"}],"predecessor-version":[{"id":28555,"href":"https:\/\/shop.profiness.de\/en\/wp-json\/wp\/v2\/pages\/28553\/revisions\/28555"}],"up":[{"embeddable":true,"href":"https:\/\/shop.profiness.de\/en\/wp-json\/wp\/v2\/pages\/28665"}],"wp:attachment":[{"href":"https:\/\/shop.profiness.de\/en\/wp-json\/wp\/v2\/media?parent=28553"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}