Self-drilling stitching self-tapping screws are available for fixing sheet-to-sheet on laps they are also used to secure the flashings to sheets such as ridges and barges. Please get in touch with us if you're unsure which screws to order: email@example.com.
- Pack Size: 100
- Head: 8mm Hex
- Application: Self-Drilling
- Use: For fixing sheet to sheet
- Washer: 16mm bonded sealing
- Length: 22mm
Corrugated Fixings Guidance
In order to securely fasten metal roof sheets to purlins, it is crucial to use appropriate fixings capable of withstanding wind pressures and changing weather conditions. The specific type of fixing required depends on the roofing profile and the purlin type (light steel, heavy steel, or timber). We highly recommend using self-drilling TEK screws, designed with a 5/16th hex head, as they offer exceptional performance.
Our provided screws feature a specialised drill point that allows them to penetrate both the steel sheeting and the purlin, creating a secure connection. Additionally, beneath the screw head, there is a 19mm stainless steel washer equipped with a neoprene-bonded pad. This pad compresses to form a seal with the roof sheet, ensuring a tight fit.
When installing the screws, the approach varies depending on the type of sheeting being used. For sheeting with a crest profile, the screws can be installed directly into the crest. However, if you are installing 13/3 corrugated sheeting, it is advisable to use longer screws and baz washers. Rest assured that all the screws we provide are self-drilling TEK screws. However, if you prefer, you can center punch an indentation on the metal sheet at the desired installation point. This method can help maintain the screw's alignment during drilling.
Remember – do not overtighten or under-tighten your screws as this can affect the performance of the washer and prevent it from sealing correctly.
What Screws Should I Use For My Sheets?
Important: Always evenly space your screw fixings across roofing sheets. Do not over-tighten or under-tighten your screws as this can affect the performance of the washer and prevent it from sealing correctly.
32/1000 sheets - Use 22mm stitching screws to fix flashings/sheets to other sheets. We recommend using TF32-S19 screws to fix the sheets on to purlins.
34/1000 sheets - Again, use 22mm stitching screws to fix flashings/sheets to other sheets. We recommend using TF32-S19 screws to fix the sheets on to purlins. Screws should be no more than 400mm apart when securing the flashing
13/3 sheets - Use 65mm BAZ TEK Screws which are self-drilling and self-sealing. When fixing your 13/3 corrugated sheeting, it's imperative they are fixed at the crest point. Colour caps can be used to match or contrast with the roof sheeting you are using. This is an effective way of hiding the silver screws from view. Stitcher screws at 22mm are advised for securing flashings in place
41/1000 sheets - We recommend using 22mm TF32-S19 screws which are self-drilling and self-sealing. Colour caps can be used to match or contrast with the roof sheeting you are using. Purlin spaces for tile sheets need to be 600mm apart.
Ridge Caps - Should be fixed using self-drilling TEK-type stitching screws. Each ridge should be overlapped by a minimum of 200mm.
For Flashings - The 22mm stitcher screws are advised for securing flashings in place. Screws should be no more than 400mm apart when securing the flashing.
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Some of Our Service Reviews
Made up with the cladding and…
Made up with the cladding and corrugated roof sheets
Delivered early which was a bonus
All the sheets were not damaged
And l must say cheapest around
Will defo use again
Date of experience: 17 October 2023
Very pleased with my grey composite cladding. Staff helpful, free samples received, confirming a good product at a fair price, leading to my purchase.
Date of experience: 11 June 2023
Help with my new garage roof!
Trade Warehouse could not have been more helpful. They very patiently guided a roofing newbie through all of the stuff I would need to do the job and provided helpful tips along the way. It's rare to find a company offering such a fantastic level of customer service as standard. I would highly recommend them and will certainly use them again.
Date of experience: 23 August 2023
My contractor (Charlie Keep) recommended you to me so I could order the materials online for delivery direct to my home. These were for a project to construct a Garden Storage Area. The materials were perfect and the whole process was simple and slick with materials delivered on time and very well packaged. Charlie has since completed the project & I am very happy with the outcome.
Date of experience: 20 August 2023
Right product, right price, right delivery.
Right product, right price, right delivery. Sure, it was only one length of cast iron guttering but they took the order seriously, packed it well and kept me updated on delivery. And when I opened the very good packaging I found it was exactly what I had wanted. How can you do better!!
Date of experience: 31 January 2023
Fast , efficient service
Date of experience: 12 September 2023
It was exactly what I wanted
It was exactly what I wanted. Arrived in good order
Date of experience: 16 September 2023