Why / when should
I use a bitumen roof shingle underlay?
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A bitumen roof shingle underlay is a bitumen membrane. The
use of an underlay is recommened for a number of reasons.
In general an underlay protects decking material from wind-driven rain. So,
it works like a safety net. The use of an underlay also reduces "picture
framing". Picture framing is the visible outline of deck panels caused by
irregularities in roof decking thickness. For slopes lower than 20 ° we
strongly recommend the use of an underlay.
IKO offers several types of underlay under the brand name Armourbase.
Can I apply new shingles over existing shingles?
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Yes. You can apply new shingles over existing shingles, but it depends on
the condition of the roof. If the roof has a single layer of shingles that
are lying flat and if the deck is in good condition, the existing shingles
normally do not have to be removed. Check with local officials to make sure
that building codes are being followed. Re-roofing is a good opportunity to
examine roof ventilation to ensure vents are sufficient in number,
positioned properly and are unobstructed. IKO has developed recommendations
on how to do this. (doorklik naar Nesting technique)
Which colors can I choose?___________________________________________________________________________________________
IKO offers you a complete range of fashionable colours. Browse our products.
How can I ensure proper performance from shingles in cold climates?___________________________________________________________________________________________
Proper performance from shingles installed and used in cold weather can be
achieved by following the recommendations listed below: make sure that the
roof is properly ventilated. Be careful when handling shingles in cold
weather. If you are in an area that experiences freezing winter
temperatures, eaves protection should be used to reduce water damage from
ice dam formation. Use a self-adhesive underlay like IKO’s Armourbase
PREMIUM SA. It is easier to work with in cold weather.
Hand seal bitumen roof shingles in cold weather with a mastic containing
elastomeric polymers like
IKO SHINGLE STICK.
When applying ridge caps, keep the shingles that are being used as ridge
caps in a warm place so that they will be flexible enough to bend. Use
caution if walking on a roof in the wintertime.
Can shingles be used in all kinds of climates?
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Yes this is definitely one of the most striking benefits of shingles; they
can cope with extreme cold weather like in Canada and have proved to be a
premium material in hot areas like Africa or South East Asia.
IKO shingles have been successfully used in many different and extreme
climates.
Which type of fastener should be used to install bitumen roof shingles:
nails or staples?
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Nails are the only good method of fixing bitumen roof shingles due to their
superior holding strength. Use corrosion resistant nails 25 mm in length
with a head diameter of 10 mm. The shaft should be 3 mm in diameter and
barbed. Cambridge shingles, hips and ridges require nails 30 mm in length.
Do not try to save money on this item. Good nails are essential to ensure
correct installation. IKO offers nails that comply with these requirements.
The following fixing tips apply to most IKO shingles: check specific
product application instructions for further information.
A minimum of four fasteners per shingle should be used. Correctly place and
position fasteners below the sealant strip, but above the cutout on tab
shingles, and in the nail line on laminated shingles. The fasteners must be
straight and flush with the surface of the shingle, not sunk into the
shingle or sticking up at any point. Make sure there is sufficient
penetration into the roof deck.
Do I need to peel the plastic tape off the shingles?
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The plastic tape on the back of IKO shingles does not need to be removed.
The sole purpose of this tape is to prevent the shingles from sticking
together in the package. Once the shingles have been removed from the
package and applied on the roof, the plastic tape serves no purpose
whatever. The shingle sealing strip, which bonds the shingles together, is
located elsewhere on the shingle and will seal succeeding courses of the
shingles together on the roof when warmed by the heat of the sun, soon after
application.
Can hail affect bitumen roof shingles?
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Compared to other roofing materials like glass, metal and PVC the damage
caused to shingles by hail is very small. Nevertheless it is a fact that
hail can affect bitumen roof shingles. The damage caused by hail can be
classified into two groups: aesthetic damage and functional damage.
Aesthetic damage results in slight granule loss and the life of the shingle
is usually not affected. Functional damage is characterised by substantial
granule loss or cracking or penetration of the shingle. Functional damage
may result in short term leaks or a reduction of the life expectancy of the
shingle. There are several factors that impact on how roofing shingles
perform in hail: Size and density of hail stones: Larger heavy stones will
cause more severe damage. Age of the shingles: Newer shingles are more
resistant than older shingles, as the bitumen is less brittle and better
able to absorb the impact energy. Angle of hail impact: Hail which strikes
the roof at a 90° angle is more likely to cause shingle fractures, while
hail that strikes the roof obliquely is more likely to result in spots of
granule loss. Temperature: Colder temperature will be more likely to cause
fractures, as the bitumen will be more brittle than in warmer weather. Roof
deck conditions: Solid roof decks on moderately spaced trusses offer better
support to the shingle surface in resisting hail damage. Shingles on rotted
or flimsy decking can be more easily fractured.
Shingle roofers
MISSISSAUGA, OAKVILLE, BURLINGTON, HAMILTON, LONDON,
STONEY CREEK, ST. CATHERINES, NIAGARA FALLS, WATERLOO, KITCHENER, ANCASTER,
DUNDAS, WATERDOWN, CARLISLE, FREELTON, GRIMSBY, GEORGETOWN, BRAMPTON, 905 AREAS,
416 AREAS, 289 AREAS, TORONTO, ETOBICOKE Roofing. roofers shingles.
What can I do to reduce the potential for shading?
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To reduce the potential for shading, do not mix shingles with different
production codes on the same roof. Make sure you follow the application
instructions provided on the shingle wrapper or on this website. Apply the
shingles starting from the bottom of the roof and move across and up. To
minimise the risk of shading, IKO only sells blended shingle colours instead
of solid colours. Do not store shingles for long periods of time and
certainly not outside.
My gutter is filled with granules. Is there a problem with my shingles?
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Not necessarily. An excessive amount of granules are applied during the
shingle manufacturing process to ensure that the bitumen on the roofing
sheet is completely covered. It is important to completely cover the sheet
with granules so that the bitumen is not exposed to ultraviolet light.
In accordance to the EN 544 the value of the loss of granules may not
exceed 2,5g (test procedure EN 12039).
But IKO does it better than that. IKO’s own maximum limited value is 1,2 g
!!!
What is colour fading?
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Colour fading is a general phenomenon that strikes every kind of exposed
roofing material; this happens under the action of ultra violet rays.
To reduce the negative effects of this phenomenon, IKO has developed its
own ceramic-coated granules. IKO mines and crushes its own mineral granules
and subsequently fuses pigments to the granule surface by a ceramic-coating
process. This gives you the benefit that fading through time will be slowed
down, certainly in comparison with some other materials or other shingles.
How can I get samples of IKO products?
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Your roofing distributor will have sample boards showing the various IKO
products and product colours.
What is a drip edge and how is it applied?
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Drip edges are used for water
shedding at the eaves and rakes and for preventing wood materials from
rotting. It is important that the drip edge is "made of a
corrosive-resistant material“. The drip edge should be applied beneath the
underlay or eaves protection along the eaves and over the underlay on the
rakes.
Where should I start installing shingles on the roof? On the top of the roof
or on the lowest point?___________________________________________________________________________________________
You should always start on the lowest point and ensure that you move across
and up. If you want to visualise this method, surf to our application film
on line. You can also download and print their application guide.
Do I need many accessories for my shingle roof?___________________________________________________________________________________________
One of the main advantages of shingles is that you do not need many
accessories: hips and ridges can be cut from shingles; the starter strip can
also be made from shingles. The only separate accessories are vents,
underlay, nails and mastic.
What are low slope roofs?___________________________________________________________________________________________
Roofs that have slopes 20° or less are considered to be low slope roofs. One
of the benefits of IKO shingles is that they can be applied on slopes down
to 15°. You should however be aware that shingles applied on low slope have
an increased exposure to sunlight and other weather conditions. Generally,
our Shield bitumen roof shingles are best suited to low slope roofs, because
the self-adhesive underside prevents wind driven rain getting underneath the
shingle tabs.
Shingle roofing contractors for repair and service
MISSISSAUGA, OAKVILLE, BURLINGTON, HAMILTON, LONDON,
STONEY CREEK, ST. CATHERINES, NIAGARA FALLS, WATERLOO, KITCHENER, ANCASTER,
DUNDAS, WATERDOWN, CARLISLE, FREELTON, GRIMSBY, GEORGETOWN, BRAMPTON, 905 AREAS,
416 AREAS, 289 AREAS, TORONTO, ETOBICOKE Roofing. roofers shingles.
How can I reduce some of the potential disadvantages associated with low
slope roofs?
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Low slope roofs are more susceptible on the one hand to water entry due to
ice dams and on the other hand to wind-driven rain. Therefore, the key to a
successful low slope roof is to increase the water shedding properties of
the roof system. Rain and melting snow do not run off quickly on low slope
roofs. As a result, the potential for ice dams is increased. IKO recommends
three ways to reduce these risks:
1) By providing adequate ventilation the formation of ice dams can be
decreased.
2) For the underlay a self-adhesive modified bitumen membrane like
Armourbase Premium SA
is the best option.
3) Finally, we strongly recommend the use 'Shield' bitumen roof
shingles,
as the self-adhesive underside prevents wind driven rain getting
underneath the shingle tabs.
I want to shingle my roof. How many shingles will I need?___________________________________________________________________________________________
By using the IKO roof estimator or by using calculations you can estimate
the number of shingles that will be needed to complete the job. Many roof
types can be classified into simple geometric shapes such as squares,
rectangles, trapezoids and triangles. To determine how many shingles will be
needed you must calculate the area of the roof. This is done by figuring out
what geometric shapes make up your roof, calculating the area of the
individual shapes, then adding up all the areas to give you the total area
of the roof. The area required is then divided by the area each bundle
covers. Don't forget to add allowances for hips and ridges, starter strips,
etc. A good approximation is to order an extra 10-15%. Your IKO distributor
and roofer will also help you to calculate your exact needs in a
professional manner.
How much ventilation do I need on my roof?
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It is essential to allow excess heat and water vapour, which are
automatically generated by human presence, to escape the roof system through
proper ventilation. Therefore, air must be able to circulate freely between
insulation and the nailable roof deck, from the eaves to the ridges. On roof
slopes 15°- 25° min. net free ventilation area is 33 cm2, on 25°- 85° min.
net free ventilation area is 16 cm2 for each 1 m2 of insulated ceiling area,
always divided evenly between the eaves and the ridge. For further
information, see the section dedicated to this technique.
Are IKO shingles required to have Material Safety Data Sheets (MSDS)?
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As shingles are not classified as hazardous, they do not require MSDS.
Do shingles contain asbestos and are they detrimental for health?
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The answer is very short: NO!
How are shingles made?
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Shingles are made in a continuous web process. Large rolls of glass mat are
fed into a dry looper, which serves as an accumulator. The glass mat moves
to the coater. At the coater, coating bitumen is applied to the top and
bottom surfaces of the sheet. Mineral stabilizers are added to the coating
that improves the shingle's fire resistance and weathering characteristics.
Next, granules are applied to the top surface of coating. Granules are
ceramically coloured crushed rock; the granules give the shingle its colour,
but more importantly protect the coating from ultraviolet light. Anti-block
surfacing is then applied to the back of the sheet to prevent it from
sticking to the machine and to other shingles when packaged. A plastic tape
tape is also applied to the back of the sheet to prevent the sealing strips
from sticking to the next shingle in the package. The granules are then
pressed into the topcoating. Once the sheet is cooled, sealing strips are
applied. The sealing strips allow one shingle to bond to the overlying
shingle on a roof and thus prevent wind uplift. The roofing sheet is then
measured and cut into shingles. The shingles are wrapped into bundles and
stored in the warehouse until they are ready to be shipped to the
appropriate location.
What can I do about ice dams?
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Ice dams are the results of continuous freezing and thawing of snow due to
escaping heat from the house or from gutters being backed up with frozen
slush. This can happen to most kinds of roofing material; if it occurs,
water may be driven under the roof, which may cause ceiling, wall,
insulation and gutter damage. Ice dams can be prevented by:
1) Installing a vapour barrier above the home's warm space.
2) Insulating the attic floor.
3) Ventilating the attic.
A good way of preventing leakage due to ice dams is to use Armourbase
Premium SA.
Can I use a shovel to remove snow and ice from my shingles?
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We do not recommend it because you can damage the shingles with your shovel.
What type of roof decking should I use underneath my shingle?
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The roof deck must be smooth, firm, dry and securely fastened. The deck
should be made of good quality plywood, sheathing boards or structural
panels (wafer or strand board: OSB). Wooden boards should be no more 15 cm
wide, in order to prevent too much distortion. All wood products must be
properly conditioned to be at moisture equilibrium. Decking should be
installed in a staggered manner and sufficiently supported. Failure to use
proper decking material or to provide a rigid deck surface can result in
deck movement, which can damage the shingles.
The type, grade, thickness and installation of materials used for roof decks
should conform to the requirements of local building codes.
Are shingles just as fireproof as other roof materials?
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Shingles conform to DIN 4107/part 7 and are therefore resistant against
spread of flame. In every country where IKO sells its shingles, IKO complies
with the local norms.
Is it true that bitumen roof shingles are less noisy in case of rain?
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When you compare shingles with most other roofing materials, the noise
produced during rain or hail on a roof with shingles is the lowest.
Are shingles resistant to strong winds?___________________________________________________________________________________________
Shingles offer a particularly good resistance to wind. The risk of blow offs
is very limited. This was evidenced for instance during the big storms in
2000 in France where most roofs were damaged while shingle roofs still stood
up.
IKO has been extensively tested in wind tunnels and has shown a
resistance to winds
up to 220 km/h.
Am I limited in the shape of my roof?
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No, not at all. Bitumen roof shingles can be applied on the most difficult
roof shapes and architects like to work with shingles because it gives them
a lot of designer freedom. With an enormous range of styles, bitumen roof
shingles can match almost every type of architectural design and achieve
virtually any desired effect.
Where can I see roofs covered with shingles?
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Bitumen roof shingles are the leading choice for residential roofing in
North America because they provide quality, durability, versatility and
economy. It is estimated that in North America more than 5 million homes are
covered with shingles every year. 80% of the houses are roofed with bitumen
roof shingles. Bitumen roof shingles offer consumers the broadest array of
colours, shapes, and textures available. In Europe, shingles are also used
more and more every year for residential housing but also light weight roofs
like sheds, cabins, car ports, outdoor Jacuzzis …