Key Benefits

  • Provides a secondary layer of defense of waterproofing because it has the ability to seal around the nails that penetrate the roof covering
  • Provides protection from ice dams
  • Protects from leaks due to wind driven rains
  • Used to waterproof the most vulnerable areas like chimneys, plumbing stacks and other roof protrusions
  • Can be used for temporary roofing

Waterproofing Underlayment Roofing Repairs

  • Waterproofing Underlayment Installation
  • Artic Style Roofing Specification Repairs (Link to Winter Roofing)

Did You Know a Roof Without Shingle Underlayment is Often the Number One Cause of Roof Leaks?

Did You Also Know Almost All New Construction and Re-Roofs Installed Over 3-5 Years Ago Have No Underlayment Beyond the First 3 Feet of the Eavestrough?

Standard underlayment, which is also called felt paper, comes in many different weights and grades. # 15 and # 30 weigh between 9 and 30 lbs per square or even less, it all depends on the manufacturer. Both underlayments are water resistant to some degree depending on the percentage of asphalt that has been absorbed into the felt or fiber glass. Much of the least expensive felt is undersaturated. But, regardless of the degree of saturation, all of these products will wrinkle somewhat when dampened, and tear very easily when walked on after installation, especially on steeper slopes. All felt underlayment can leak if they are cut to make them lie flat after they have wrinkled and all can leak around nails driven through them.

Synthetic underlayments do not tear or wrinkle when they come in contact with moisture. Waterproofing shingle underlayment does not wrinkle from moisture absorption and they do not leak around nails driven through them. Therefore, they are not just water-resistant, they are waterproof. When both of these underlayments are used as a subroof system it helps maximize the protection for your roof and home.

What is A Waterproofing Shingle Underlayment?

Waterproofing Underlayment is a composite material of asphalt and elastic polymers reinforced with a fiber glass membrane. It is formed into a rolled sheet. The rubberized asphalt provides the water proofing. The polymers make the asphalt elastic and sticky all the way through the membrane. This means a waterproofing underlayment has the ability to both stretch and cling and not rip when stressed. It seals, like a gasket, around nails driven through it. It is warranted to remain effective during the warranted lifetime of the new asphalt shingle system applied over it.

With all the seams in a roof caused by the overlap of shingles, there has to be an additional layer of protection between the roofing materials and your house. This is where underlayment comes in. Today there are many options for roofing underlayment materials, and the right one will keep moisture, cold weather and hot air out, giving your roof a longer life.

A proper waterproof underlayment is better than felt because it is stronger, lighter, resists tearing and wind blows off better. It is more durable in our northern climate and provides better water protection.

Why is a Waterproofing Shingle Underlayment So Important?

You should have ice and water shield installed because it provides extra protection for sloped roofs subject to the effects of ice dams or wind driven rain. All the vulnerable areas of the roof are particularly susceptible to water getting in underneath the shingles and penetrating the roof deck below and eventually inside the building. Gutters fill with snow and ice which can melt underneath the drip edge or creep up the fascia boards. This will cause a leak in your home because the water will go right where your roof deck and fascia board meet. With homes prone to ice dam problems this material installed utilizing artic style specifications can go a long way to help avoid a catastrophe.

Where Should Waterproofing Underlayment Be Installed?

Given all the roof leaks we encounter, we believe it is in the home owner’s best interest to insist on using underlayment around the perimeter of the roof and in valleys, around skylights, chimneys, plumbing vents, ventilation caps or anything that penetrates a roof. The roofer laps the material up onto the object and cuts it at corners or curves it to create a leak proof barrier. Traditional roof flashings then cover this sub-flashing made from the shield product. You can’t apply it on top of old shingles so your roofer will need to remove the existing shingles and install the ice and water shield directly to the roof deck and then install new shingles and flashing on top.

How do I Know if I have Shingle Underlayment?

If you’re not sure if you have shingle underlayment, waterproof or not, contact us today for an inspection to find out. Our inspection specialist can reveal the truth under your roof. So contact us today to book a service call with one of our professionals.

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