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3. The 3rd piece of capping must continue with a full tab and the position of nails is the same as with the 1st piece. Remember: “Exposed nails are not permitted”
4. The 4th piece is combined from two halves which are fixed with two nails each in opposite corners. These 2 half-tab pieces have to be fixed with 4 nails in total!
5. Repeat the sequence of the first four pieces up the hip or ridge. The final shingle should be set and the exposed nail heads of this shingle should be covered with Shingle Stick.
Tip: Sprinkle a few granules from the bundle over these Shingle Stick’s dots to make it aesthetically nice.
Remember: “Prior to application in cold weather, store hip and ridge shingles in heated area to allow for easier bending!”
Application instructions
Easy application (for professional roofers):
- Base is a wooden or concrete underdeck construction with a waterproof IKO underlayment.
- Apply roof shingles with IKO nails.
- You would need +/- 35 pc/m². Valley, hips and ridges are easy to install without purchasing a huge range of extra accessories.
- Use Superglass 3TAB shingles to cover hips and ridges.
Foresee solid insulation and also good ventilation for an optimal and long-lasting roof - improving heating and cooling costs.
Eaves, rakes, walls, chimneys, roof windows, etc. require metal flashings.
Providing a solid roof starts at the base: a roof deck suitable for the nailing and installation of shingles. The type, grade, thickness and installation of materials used for roof decks should conform to the requirements of the relevant local building codes of practice and regulations.
The roof deck should be a stable, smooth and solid surface where shingles can be easily and, more important, securely installed. The roof deck must be strong to:
- Support the roofing materials and workers.
- Safely resist impact loads, such as a pile of shingles.
- Hold constant loads, such a heavy snow.
- Provide resistance to wind force.
- Anchor the nails.
All of these conditions must remain effective during the service life of each application of shingles.
Let’s take a look at 3 roof deck materials we suggest.
1. Sheathing boards or plywood
Sheating boards are made from thin layers of wood adhered together, each with its grain at right angles to adjacent layers for greater strength and dimensional stability. Usually there are an odd number of layers so that the grain of the outside layers run together.
Points of attention during installation:
- Install the boards with staggered vertical joints, parallel to the ridgeline. The vertical joints between boards must be supported along the whole length and nailed down well.
- Ensure sufficient support with a maximum of 600 mm in between two rafters.
- Plywood panels should be installed with 3 mm spacing between them (unless stated otherwise by the manufacturer).
2. Oriented strand board (OSB)
Cross-orientated layers of thin rectangular wooden strips or strands, compressed and bonded together with waterproof exterior-grade binders, are formed into wide mats. The layers are oriented like plywood and may have three to five layers. The outside layers are longitudinally arranged to increase the strength and stiffness in the direction of the alignment, that is, the long direction across the rafters or trusses.
OSB is available for structural applications and for non-load-bearings uses. In Europe there are two basic grades available which are suitable for shingled roof structures.
- OSB/3: For load-bearing applications in humid conditions.
- OSB/4: For heavy-duty load-bearing applications in dry or humid conditions.
For shingled roof structures only, OSB/3 or OSB/4 can be used. The OSB panels should be also installed with 3 mm spacing between them. It is not necessary with tongue & grove locking system. Remember, panels can absorb some moisture, and then expand which can cause buckling, ridging or sagging.
3. Wood boards
Instead of sheathing boards, solid wooden boards can be used as well. However, to minimize the effects of distortion, make sure that the boards are not wider than 150 mm and approximately 24 mm thick.
It is important to stagger the board joints. When a number of adjacent boards join on the same support/rafter, it is possible for deck movement due to distortion to a crack line in the shingles. All wood boards must be properly conditioned to be at moisture equilibrium. Never use undried, recently stripped, concrete-form lumber.
The number of fasteners should be sufficient to prevent buckling. Each board must be fastened with at least two nails in each rafter.
