amstill roofing


Roofing Process

Before Roof Replacement

After Roof Replacement

In an attempt to assist our Amstill proposal recipients we are providing this proposal information to assist you in comparing bids and in understanding the items we recommend for your roofing project.

  1. Removing all Existing Material: It is important to remove all existing material for three main reasons:A. Weight of the roofing becomes a factor when more than one layer is applied. B. By not removing existing roofing the probability of roofing over rotten decking is a real concern. C. Provides solid nailing of shingles.
  2. Existing Decking May Have Structural Deflections: Many, if not most of the homes in the Houston area have or will incur structural deflections. New roof application will not remove these deflections and only structural work within the attic will do so.This is something you may want to discuss with your Amstill representative.
  3. Replacing Rotten Decking or Rotten 1” x 4” Lath: Obviously the case here is for replacement of rotten decking, and/or rotten lath strips. Applying new roofing over rotted material does not allow nails to grip firmly and creates problems by the nails working up through the new roofing material. Also, in the case of rotted wood, the area can increase and create moisture problems.
  4. The Type of Decking To Be Used: This will be recommended by your Amstill representative. There are three major types of decking available, (15/32 APA rated Plywood, 7/16 APA rated OSB, and OSB Techshield). Each of these types of decking are excellent and your specific application will dictate the type we recommend.*It should be noted that we recommend and use ring shank nails to apply the decking, for a more solid nailing.
  5. The Type of Felt To Be Used: Most felt is sold by 15 lb or 30 lb weight, and also by specific manufactures name in the fiberglass reinforced felts. Where applicable, we recommend high grade synthetic underlayment. This is water proof and 30 times stronger than traditional felt that most roofers use. which lay much flatter and provide a longer life. The purpose for felt is to help prevent wind driven rain from infiltration under your shingles and causing damage to your roof structure.
  6. The Type of Drip Edge To Be Used: Drip edge is the metal trim around the perimeter of the roof, located on top of the fascia board. Many types are available in several dimensions. The best type is the 2”x 2” drip edge that has a baked on enamel paint finish. Existing drip edge that matches exterior paint is re-used with Homeowners approval. Most roofers use 1.5″x1.5″ which gives your home less protection on the edge of your roofline from wind driven rain.
  7. Manufacturers Starter Course Shingles: These flat shingles are used on the first row of shingles around the perimeter of the house. To allow for the staggered pattern of the laminated shingles, which are applied over the pro starter course. They have a high-quality adhesive that helps prevent blow-off.
  8. Apply Half-Laced Valleys with Manufacturers Water Proofing System: This 3-foot-wide waterproof mat is adhered to the decking and provides a waterproof material that can be nailed thru. This Water Proofing System provides a watertight seal.
  9. Using 1 1/4 with 3/8” Head Roofing Nails: These nails, which are applied 4-6 nails to a shingle are a superior fastener and provide a much better wind resistance system. They are installed with Manufacturers approved nail gun fasteners.
  10. Replacing of Roof Vents: Replacing the roof vents is an important element of roofing. In the case of city code vents, it is normally only necessary to re-roof around the code vents and to seal the storm collars. We always paint the per code vents the shingle color.
  11. Replacing Plumbing Jacks: This is also a very important element of roofing. The plumbing jacks are often the victim of squirrels gnawing on them to hone their teeth. Replacing and painting the jacks often abates the squirrels desire to use them for honing their teeth.
  12. Replacing Turbine Ventilators: This practice is very important. In the instance where a house does not have sufficient ridge to allow for ridge vents or when the house has inadequate soffit ventilation, then the 14” diameter double sealed bearing ventilators are the optimum product.
  13. Installing Ridge Vent: This is the optimum passive ventilation system available when the house allows for the system. Note: the linear feet that are being proposed for installation must have adequate air intake at soffit overhang to function properly.
  14. Step Flash Siding Junctions: When wood, brick or any other type of siding abuts the roof then it is very important that the flashing be applied correctly to prevent problems where the siding joins the roof. On occasion, the existing flashing is functional and left in place. New 8×8 step flashing will be installed as applicable. Some wood siding junctions may require carpentry work to address rot issues.
  15. Manufactured High Profile Ridge Shingles: These Shingles are a specifically manufactured product made for the hips and ridges of a roof. These shingles are thicker than the alternative 3-Tab shingles. The manufactured ridge shingles add a larger amount of curb appeal to the house and are obviously more expensive than the 3-Tab shingles. Enhanced ridge row products provide a higher quality application with a striking look.
  16. Skylights: The Skylight penetrations are a very important part of the roofing process. Storm guard waterproofing system is applied around the entire perimeter of the skylight.
  17. Haul off Debris: It has always been Amstill’s requirement that when we have completed a job, the clean up of the property should leave the property cleaner than when we arrived. Amstill uses industrial nail magnet sweepers.
  18. Protecting Attic Storage: Before our jobs begin we install plastic in the attic storage area only to catch the debris involved with removing the old cedar shingles. The plastic is applied in areas where the attic has decking and where our crew can safely walk without danger of stepping through the ceiling. We do “NOT” cover the entire attic.
  19. Protect Landscaping, Swimming Pools, and Decks: Amstill will always cover swimming pools and decks with plastic; and will lean plywood over landscaping to protect the plants. The utmost care is given to protecting pools, decks, and landscaping.
  20. Step Flashing and Counter Flashing: the Chimney involves removing all of the existing metal at the Chimney at its junction to the roof. When the replacing of the step flashing and counter flashing with new metal occurs it assures a waterproof junction. Occasionally we add a cricket behind the Chimney, when applicable, to divert water from the back of the Chimney. Note: Manufacturers Waterproofing System is applied around the entire Chimney perimeter for added protection.
  21. Remove Debris from Gutters: After completion of the job Amstill will clean all gutters and flush the downspouts as part of the clean up process. Also, if gutter spikes are loose, Amstill will re-nail the gutter spikes.
  22. Water Slope Additions: When low slope additions are part of the job, Manufacturers Water Proofing System is applied on the decking prior to the installation of the surface material. This prevents water penetration.

Amstill performs 90% of its roofing jobs in one day; this is accomplished by having a very large and experienced crew.

Obviously you will have questions pertaining to your specific proposal and we are available at your convenience to come by and answer any of your questions and to review your project in its entirety. We would like to thank you for providing Amstill Corporation the opportunity to bid on your roof and we look forward to working with you.