1 the starter course is incorrectly installed face up.
Starter course slate roof.
As well starter shingles have a sealant strip and when positioned correctly the sealant strip will be on the top surface and at the lowest edge of the roof.
Check roof pitch and make sure that the correct size slate and lap are used.
You can read about starter courses on slate roofs in traditional roofing 5.
Small full slates at the rake edge for the s series use a 6 slate on top of the starter course as either the first visible slate or to create the half stagger of the second course install a full piece and then install successive courses with the same offset by alternating the 6 and 12 slates.
One can tell immediately if a slate installer is experienced or not by looking at the starter course.
The exposure on the first course of slate must instead be.
Before you run out and start chalking 8 inch lines up a roof for 20 inch slates let me remind you that the starter course first course and often second course will be chalked on a different measurement.
If the starter course is laid with the face side up the installer is inexperienced and it s likely there are additional mistakes in the roof installation.
This is a very common mistake inadequate headlap on the starter course.
If the slate has been sorted and the roof marked out properly then laying the slate is straight forward.
Used in conjunction with our standard leading edge plus starter armour starter provides extra thickness and protection between the shingle tabs of the first course of armourshake ensuring a beautiful roof appearance from bottom to top.
An 8 5 exposure on the first course of slates then would only leave a headlap of 1 5 on the starter course a mis take.
Slate starter courses.
If you have selected iko s armourshake shingles for your roof you will need to use iko armour starter.
At the eave the starters provide a simple way to cover the joints between the finish shingles in the first course ensuring complete water shedding roof coverage.