The film is removed during application so that the membrane will adhere to the roof deck and also form watertight end laps and side laps when properly applied. The membranes are designed to form a watertight seal around the nail penetrations when shingles are applied.
Potentially, covering an entire roof with ice and water protector can prevent leaks even after high wind conditions blow shingles off the roof—preventing further damage and making repair easier. However, because the modified bitumen back surface is continuous, these membranes can result in a vapor barrier.
Should a homeowner decide to cover the entire roof with ice and water protector, it is even more important to consider proper attic ventilation carefully.
In fact, contractors can use ArmourGard as an exterior vapor barrier for foundations or basements. In strong storm situations, such as hurricanes, the wind can push rainwater beneath the shingles. The ice and water protector membrane, fully adhered to the roof deck, greatly lessens the chance of the wind-driven rain infiltrating the roof surface and causing a leak.
So, protection from this risk should be a paramount concern both when shopping for insurance and when protecting your roof. Ice dams are a serious issue for homeowners and roofing professionals in both cold climates and where occasional snow may fall. Ice dams are formed by the continuous melting and freezing of snow due to heat escaping from the house, or from a backup of frozen slush from the rain gutters.
The melted water flows under the snow and freezes as it reaches the unheated soffit area at the eaves, thus creating an ice dam. Ice and water protector membranes are a time-tested and effective solution to help with this problem.
They offer superior protection against the water that is forced beneath the shingles by an ice dam. Ice and water protector is typically required for low-slope areas and valleys because these roof areas are particularly vulnerable. Homeowners are encouraged to check their local building code as some jurisdictions will have different requirements for use.
The key component of roof ice and water protector is polymer-modified bitumen also known as asphalt. A common feature of most ice and water protectors is the advantage of self-sealing around roofing nails. This feature greatly reduces the possibility of leaks occurring when ice or storms force water underneath the shingles.
No, you cannot install ice and water shield in the rain. The deck must be dry before you start applying the membrane. There are some circumstances where you may put ice and water on the whole deck and some building codes may require it.
However, in most circumstances, you should not put ice and water shield on the entire roof deck. Other underlayments typically cost less than ice and water protector, so using them on the rest of the roof is more cost-effective for the homeowner. However, you should always refer to your local building codes.
You do not need to use any permanent fasteners when installing ice and water shield. Your specific product might call for the use of temporary fasteners to hold the membrane in place, but these are meant to be removed.
The compressive strength of snow increases as it compacts from its own weight, increasing its density. This results with the greatest compressive strength of the snow bank at its base adjacent to the roof surface and at its downslope eave end. Since snow guards are expected to last the entire service life of the roof, MCA recommends always using mechanically attached snow guards, never glued.
According to Haddock, the method of attachment of snow guards should be consistent with the roof type. Therefore, a face-fastened roof should use a face-fastened snow guard attachment with butyl copolymer sealants and fasteners of no less quality than those used for the roof itself.
And, a standing seam roof should use clamp-to-seam attachments that are metallurgically compatible with the roof material. For through-fastened roofs, Haddock says sealants should be at least equal in performance to those used in the roof itself.
Similarly, fasteners should also last the life of the roof. According to the MCA technical bulletin, sealants and washers can be used to protect the sealing material from direct exposure to sunlight. When choosing washers or sealants for waterproofing, use ones with the same chemistry as the washers and sealants present in the roof system to ensure a similar expected service life.
It is important that the snow guard system is designed for each specific project. As Haddock notes, the steeper the roof, the greater the forces are that act on the snow guard assembly. For installing snow guards, most of the tools needed are common to the trade. One exception, Haddock says, is for systems anchored with seam clamps, a torque wrench is needed to check that the electric driving tool is delivering the torque specified by the manufacturer. Press the membrane in place with heavy hand pressure.
Minimum overlap guidelines are set by the manufacturer. GCP requires side laps to be a minimum of 90 mm 3. The Back-Roll Method Some contractors prefer the back-roll method. Start by unrolling a m ft.
Align the membrane and roll in the intended direction of the membrane application. Carefully cut the release liner on top of the roll in the cross direction, being careful not to cut the membrane. Peel back about mm 6 in. Hold the release liner with one hand and pull the roll along the deck with the release liner, leaving the applied membrane behind.
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