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Flat roof connected to pitch roof
A flat roof isn't actually flat; it has a slope of 2° - 3°. It appears to be flat, but it needs a slope to allow the water to drain from the roof. For slopes less than 9,5° we cannot install roof shingles. Instead the roof must be done with a modified bituminous membrane (e.g. Armourvalley) or other materials like EPDM, PVC or TPO covering.
Use of underlay and bituminous membrane
The colors of IKO Armourvalley membranes are matching the colors of IKO shingles. This creates the same beautiful look as on the main roof. Armourvalley is a high quality APP modified roll especially for roof valleys but it can also be used for low slope roof areas that are not suitable for shingles. Armourvalley cannot be applied directly on a wooden deck. First an underlay (e.g. Armourfix) must be installed as a base sheet. Armourfix is an underlay for IKO Armourvalley. This underlay must be applied with a good mechanical fastening; this means roofing nails or screws every 20 cm in all directions. Afterwards the IKO Armourvalley must be fully torched on it.
A very important detail is where the flat roof is connecting the pitch roof. Armourfix and Armourvalley membranes must be installed and extended 60 - 90 cm up the main roof underneath the shingles in order to assure a waterproof connection.
The starter strip and first row of shingles must be applied 25 cm from the bottom of the slope roof (or main roof) above the slope transition. The starter strip must be securely glued on the Armourvalley membrane.
Tip! Some roofers install a metal flashing under the starter strip to protect the lower part of the roof to accumulate water and snow loads.
Important! Remember: the slope of a flat roof must allow the water to drain from the roof. If water is not drained from the roof, any weak detail can be a potentially leakage in future!
Spring has dominated the past few weeks and summer is in sight; colors everywhere, days are almost at their longest.. For the past few months, your shingles roof has weathered cold temperatures, thick snow, freezing winds, and lots of melting. The winter season is very tough for every roof, so spring is a perfect time to check for any problems that may have developed over the last few months and do some roof maintenance.
Follow our spring / summer roofing checklist to ensure that your roof is in perfect condition.
Exterior roof check
Many roofing problems can be detected from the outside. Do you detect one or more of the following problems? Be sure to take care of these issues as soon as possible!
- Loose or exposed nails
>>> cover these exposed nails with IKO Shingle Stick, then sprinkle some granules on top. - Shingles that are cracked, curled or buckled up
>>> check if the ventilation is working properly and change the affected shingles. If there are too much damaged shingles, you have to start thinking about a new roof. Ventilation is essential for the longevity of your roof. - Loose or missing shingles
>>> repair and install the missing roof shingles. Check out IKO's roof shingles range. - Loose roof shingles at hips or ridge lines
>>> repair and install the missing shingles at the hips and ridges.
Check out how to cover your roof with hips and ridges. - Algae stains or moss
>>> apply a high quality anti-moss liquid on your shingle roof. - Shingles with missing granules
>>> use IKO Shingle Stick and some granules on the affected parts or replace with full shingles. - Sagging or bulging
>>> call a professional roofer or carpenter to brace the affected part. Probably you will have to renovate the deck and/or roof. - Cracked or missing caulk on flashing
>>> re-caulk all problematic spots with IKO Shingle Stick. - Flashing that is damaged or missing
>>> install a new metal flashing. Don’t forget your counter flashing. - Rusted metal flashing
>>> treat the affected spot and paint or replace the metal flashing completely. - Dry rot
>>> start to think about a complete renovation. Call a professional roofer for inspection of your roof and a quotation.
IKO recommends in this case the perfect solution for your renovation project: Cambridge Xtreme 9,5°. - Broken seals
>>> re-caulk broken spots with IKO Shingle Stick - Cracks in the chimney
>>> check the flashing around the chimney, re-caulk them if necessary with IKO Shingle Stick. - Damaged gutters or downspouts
>>> repair or change the damaged parts with new gutters and/or downspouts. - Rotted or damaged fascia board
>>> try to repair the wooden fascia or change them for new ones.
Interior roof check/Attic space check
But not only at the exterior of your roof you can detect problems. When inspecting your roof, also head to the attic to look for any of the following problems:
- Leaks around the chimney, vents, etc.
>>> check out the problematic spots and try to seal them with IKO Shingle Stick. - Sagging between rafters
>>> a professional roofer or carpenter can try to brace it from the inside but this is not always a possibility. - Cracks on roof sheathing
>>> this can be temporarily fixed from the attic space but a complete renovation must be done before the winter.
Snow loads can cause bigger damage/ - Proper ventilation
>>> check if the intake and exhaust openings are not plugged or too small. The air under the deck must circulate freely. - Signs of moisture
>>> somewhere there is improper ventilation, check the full ventilation system. - Visible light from the outside
>>> control and repair the metal flashings around the chimney. - Signs of damage from pests
>>> repair damaged parts if possible and protect the roof attic from the pests.
