3m headlap roofing granules are used in the headlap area of roofing materials.
Headlap roofing.
Headlap is essen tially what renders the roof water tight.
For a 3 dhl add 7 5.
Headlap is what renders the roof water tight.
Includes proprietary post treatment and adhesion promoter coating to reduce staining color variability and improve adhesion.
Headlap is what keeps the water from penetrating through the roof.
If there is no headlap the roof will leak.
Available in a variety of colors.
This is achieved by simply increasing the headlap to 4.
Our company motto is roofing excellence and that s what we do.
3m headlap roofing granules.
Headlap is what keeps the water from penetrating through the roof.
Set the standard for excellence quality durability and innovation.
We are a family owned company that has been committed to manufacturing quality residential and commercial roofing products since 1951.
Standard headlap these days is 3 however the headlap varies according to slope figure 3.
When the slope drops water drains more slowly so more water tightness is required.
If there is no headlap the roof will leak.
The weights given above are based on a 2 double headlap dhl.
All american slate roofing slates are pre dilled with two nail holes.
3m headlap roofing granules.
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