LifePine® Installation Specifications
1. Roof Pitch and Exposure
- LifePine® Shakes and Shingles should be applied on a minimum pitch of 4/12 under the following instructions.
- Lower pitches can be accommodated with special application procedures that include modified bitumen or an Ice and Water shield.
- The maximum weather exposure for a 24″ Ultra and Classic shake is 10″.
- LifePine® shakes and shingles can be applied over solid decking, 1″ X 4″ open spaced sheathing or 1″ X 6″ open spaced sheathing.
- Sheathing boards should be placed on centers equal to that of the weather exposure.
- Sheathing boards should not be spaced along the eave for the first three feet.
- Stainless steel ring shank nails used in conjunction with an air nailer is the preferred method for fastening LifePine® shakes and shingles.
- All nails and screws must be manufactured and approved for use with pressure treated lumber.
- Fastener Lengths of 2″ to 2 ½” are recommended.
- Please note that a reduction in the recommended exposure with necessitate longer nails.
- Hip and Ridge cap may require the use of longer fasteners and will require one stainless steel screw to complete installation
Each shake should be fastened 1″ above the exposure line and 1/2″ to 1″ for the outside edge.
Proper nail placement is crucial to the stability of the product and adequate penetration into the sheathing is essential.
4. Felt Interlayment
- Roofing felt interlayment between each course of shakes is REQUIRED.
- A #30 or 30 lbs. felt is recommended.
- A 36″ wide strip of felt is to be applied along the eave before the starter course is applied.
- An 18″ wide strip of felt is used between each course of shakes as an interlayment.
- The bottom edge of the felt is positioned over the tops of the shakes at an exposure that is twice that of the shake exposure (20″, or top 4″ covered, on an 24″ shake with a 10″ exposure and 15″, or the top 3″ covered, on an 18″ shake with a 7 1/2″ exposure) and extending out onto the sheathing.
- Starter course-The first course of shakes should be doubled and nailed over a strip of 36″ wide roofing felt.
- Extend the butt ends 1 ½” to 2″ beyond the fascia. Apply the second course of shakes directly over the first offsetting the joints by at least 1 ½”.
- Do not space adjacent shakes, as some shrinkage will occur as the shakes weather.
- Adjacent shakes should be lightly butted together.
- Fasten each shake with 2 nails as explained in section 3.
- As each shake is installed, the joints should be offset by 1 ½” over adjacent courses.
6. Hip and Ridge Cap
- Intersecting roof surfaces at hips and ridges should be capped with either factory or site made ridge units.
- The weather exposure of hip and ridge caps should be the same as the body of the roof and overlapping joints should alternate.
- Nails must be 1″ longer than those used in the body of the roof to adequately penetrate the sheathing.
- Attach each piece of hip or ridge with two nails at 1″ above the exposure line. After the cap is in place, the butt end of each piece should be screwed together with one 1 ½” stainless steel screw.
- Flashing material should either be painted galvanized metal or copper.
- A strip of #30 felt should be installed over the sheathing and under the metal valley.
- Metal valleys should be a minimum of 20″ in width.
- Joints between shakes should not break into the valley and nails should be placed well away from the center of the valley.
- Adequate ventilation is essential for any wood roof system
- Vents should be provided in soffits or gable ends.
- Ridge vents can also be used and are available specifically designed for use with wood roofs.
- When a ridge vent is desired, site made ridge cap should be constructed with adequate width to cover the vent.
LifePine® Shake Low Slope (2/12-4/12) Application
1. Roof Pitch and Exposure
LifePine®shakes and shingles should be applied on a minimum roof pitch of 2/12 under the following instructions. The maximum weather exposure for low slope application is 7 ½”.
LifePine®shakes on low slope roofs should be applied on solid decking only.
In low slope applications, an underlayment between the shakes and the decking is required. There are two approved systems for the underlayment.
A) A layer of Polymer Modified Bituminous Sheet (a “peel and stick” type ice and water shield product) is installed over the decking. Then the shakes are installed directly on top of the base sheet with a reduced exposure.
B) A conventional hot-mop asphalt roof (using 90 lb. Felt or suitable roll type roof product) in conjunction with a lattice like frame work on which the shakes are installed. Please consult the NRCA Roofing and Waterproofing Manual for details.
4. Felt Interlay
Roofing felt interlay between the shake courses is required. 30 lb. asphalt saturated roofing felt is recommended. A 36″ wide strip of felt is to be laid along the eave before the starter course is applied. An 18″ wide strip of 30 lb. felt is used as an interlay between each course. The bottom edge of the interlay felt is positioned on top of the upper edge of the shake courses and extends out onto the sheathing. It is positioned above the butt edge of the course at a distance equal to twice the weather exposure. On a 7 ½” exposure application, the bottom edge of the felt would be 15″ above the butt line. Thus, on a 24″ product using a 7 ½” exposure, the felt will cover the top 9″ of the shakes and extend 9″ onto the sheathing.