Last week we talked about the 5 common sizes of roofing screws.
This week we will talk about 3 of the 5 sizes pairing up with their respective applications on corrugated metal roofing system.
Here is a simple illustration of corrugated metal roof:
The 3 main parts to secure a fasteners are:
Valley
Fasteners recommended:
Size:
12-14 x L
M5.5-14 x L
(min.20mm max. 35mm)
Head Profile: Hex Washer Flange with round EPDM washer or
Hex Washer Head with Galvanized/Aluminum bonded EPDM washer
Thread Profile: Full Thread
Drill Point Profile: Self Drilling Point 3, steel penetration 5.5mm
Crest
Fasteners recommended:
Size:
12-14 x L
M5.5-15 x L
(min.40mm max. 300mm)
Head Profile: Hex Washer Flange with round EPDM washer or
Hex Washer Head with Galvanized/Aluminum bonded EPDM washer
Thread Profile: Full Thread/ Double Thread with Shank Protection Ridges
Drill Point Profile: Self Drilling Point 3, steel penetration 5.5mm
Stitching
Fasteners recommended:
Size:
14- 20 x 22mm
15-15 x 20mm
M6.3- 20 x 22mm
Head Profile: Hex Washer Flange with round EPDM washer or
Hex Washer Head with Galvanized/Aluminum bonded EPDM washer
Thread Profile: Full Fine Thread
Drill Point Profile: Self Drilling Point 1, steel penetration 1.8mm
These are the common sizes of fasteners used on corrugated metal roof. Looking for more? Reach us to get an offer today!
Some customers have questions about whether to secure fasteners on the valley part or crest part. While it is always subjective, we do have the pros and cons on respective installation area and we will share with you some times in our next issue.
In the meantime share with us where do you normally install your fasteners and why.
Side note:
Wondered why your metal roof looks like this and how to prevent it? Find out here
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