Roofing Products Buying Guide: Shingles, Underlayment, Coatings and Fasteners by Roof Type and Climate

A finished roof is a stack of parts that have to work together: the field shingles or membrane, underlayment, starter and ridge, fasteners, and, on low-slope or metal surfaces, a coating or fully adhered sheet. This guide covers those layers by roof type and climate, with special attention to Texas heat and hail. Part numbers, coverage, and prices come from Manu’s current Roofing4US catalog. For foam, R-values, and basic shingle-quantity math, see the companion roofing and insulation supplies guide.

Manu is the seller of record for every order placed on shopmanu.com. These roofing goods are fulfilled by a partner vendor, and many ship as bundles, pallets, or long rolls on less-than-truckload (LTL) freight. The shipping charge is calculated by the carrier and shown at checkout; this guide does not estimate delivery times or freight cost.

Match the system to the roof and the climate

Steep-slope asphalt roofs are built from architectural or three-tab shingles over underlayment, with a dedicated starter at the eaves and rakes and a matching hip-and-ridge cap. Low-slope roofs need a continuous membrane, not a shingle, because water can stand or move slowly. Metal roofs still need a compatible underlayment and, at laps or penetrations, a coating or sealant made for that surface.

Climate changes the stack more than marketing names do. In North and Central Texas, hail is a regular insurance issue, so impact-rated shingles matter as much as color. Across most of the state, summer attic temperatures are high, which makes granule color, underlayment that can sit exposed during a delay, and a correct fastening pattern worth getting right. Along the Gulf Coast, a light electro-galvanized nail is a weak link in salt air. In colder regions, ice-and-water membrane at eaves and valleys is standard; this catalog did not list a dedicated ice-and-water shield when the guide was written.

Choosing asphalt shingles

Three-tab shingles are a single layer with cutouts. Architectural, or laminated, shingles use two mats laminated together for a thicker, wood-shake look. Coverage is not the same on every line, so do not assume three bundles make a square.

The dollar-per-square figure is bundle price times the bundles needed to cover 100 square feet, with no waste, starter, or ridge. Add about 10 percent waste on a simple gable and 15 percent or more on hips, valleys, and dormers, then add starter and cap separately. A 20-square gable with 10 percent waste needs 66 bundles of IKO Cambridge (20 × 3 × 1.10) but 72 bundles of Heritage or Heritage IR, because those TAMKO lines cover 30.76 square feet per bundle rather than 33.3.

Heritage and Heritage Premium are both $39.39 with the same 20-shingle, 30.76-square-foot bundle and nearly the same product copy. The verified difference is the color set and SKU prefix: standard Heritage uses codes such as THBW (Black Walnut) and includes Glacier White (THGW); Premium uses a THP prefix (Black Walnut is THPBW) and a shorter color list. Compare the color you need, not the word “Premium” in the title.

IKO Cambridge Dual Black, SKU ICSHADBL1BD, is 40 7/8 inches by 13 3/4 inches, with a 5 7/8-inch exposure and 20 shingles (33.3 square feet) per bundle at $56.00. Other Cambridge colors use the same coverage and price. Pair the field color with the matching Cambridge hip and ridge — Dual Black is SKU ICHRDBL1SQ, $111.09, 36.5 linear feet per bundle (26 shingles, 78 pieces).

CertainTeed XT 25 is the three-tab option: 26 shingles and 32.5 square feet per bundle at $45.92, which is more per square than Heritage and less than Cambridge or Heritage IR. Colors include Black (CT-XT-25-B) and lighter blends such as Star White (CT-XT-25-SW) and Silver Lining (CT-XT-25-SL). Use it when a flat tab look is required, not as a cheaper stand-in for a laminated shingle.

Texas heat and hail

For hail, the listing that states a published impact classification is TAMKO Heritage IR. The page describes a fiberglass mat fully reinforced with a polyester mat across the shingle width, weathering-grade asphalt on both sides, and a ceramic-granule surface, classified by UL to UL 2218 Class 4. Coverage matches standard Heritage — 20 shingles and 30.76 square feet — at $52.93. Colors are Thunderstorm Grey (THITG), Rustic Black (THIRB), Rustic Slate (THIRS), and Weathered Wood (THIWW). Finish hips and ridges with TAMKO Heritage Hip & Ridge, 26 pieces and 33.3 linear feet per bundle, at $55.29, in a color that exists on both pages.

For heat, granule color is the variable you can actually pick. Dark colors such as Cambridge Dual Black absorb more solar energy than Heritage Glacier White or XT 25 Star White and Silver Lining. That is a real tradeoff on west-facing planes and poorly ventilated attics, not a reason to rule out a dark roof. Keep intake and exhaust ventilation clear; baffles and attic R-values are covered in the insulation guide. Several listings note that all colors may not be available in your location, so confirm the color before the crew is scheduled.

Underlayment

Synthetic underlayment has largely replaced No. 15 and No. 30 felt on steep-slope work because it is lighter, does not wrinkle when wet, and is harder to tear while the roof is open. Grayhawk Synthetic Underlayment is the single-roll option. The page describes it as a substitute for asphalt-saturated felt on asphalt-shingle and metal steep-slope roofs, with a deck-side slip-resistant coating, a surface that lays flat when wet, and a secondary water barrier. Two sizes are $55.60 and both contain 1,000 square feet of material before overlaps: 4 ft × 250 ft (SKU GHRPTR4X250) and 5 ft × 200 ft (SKU GHRPTR5X200). Plan from those dimensions; overlaps reduce net coverage.

Pallet quantities are listed for larger jobs. EXO25-SB is 42 rolls, SKU EXO25-SB, at $2,779.98. The listing describes a synthetic woven underlayment with a grey spunbond walking surface, an 18-pound roll, 10 squares of material per roll, a preprinted nailing pattern, and UV exposure of up to six months, and it recommends STINGER cap fasteners, which are also in the catalog. Raptor is pallet-only, from $3,600.00 for 56 rolls of 4 ft × 250 ft (SKU RAPTOR4X250), and is listed as unavailable in Michigan, Atlanta, Philadelphia, Syracuse, and St. Louis.

Starter strip, hips, and ridges

Do not cut field shingles for the eave if a purpose-made starter is listed for the line you are installing. IKO Leading Edge Plus Starter Strip, SKU ILSSBL1BD, is $95.10 per bundle. The listing describes a black starter, 40 7/8 inches by 7 7/8 inches, peel-and-stick and pre-cut, with 18 shingles that yield 36 pieces and 123 linear feet of coverage. Measure eaves and rakes, add a little for laps and waste, and divide by 123. Use the matching Cambridge cap on IKO field shingles, and the TAMKO Heritage cap on Heritage and Heritage IR, so the granule blend stays consistent at the peak.

Coatings and low-slope membranes

A silicone roof coating is a repair layer, not a substitute for shingles on a steep slope. All Purpose Flex Repair 100% Silicone Roof Sealant in the 3.5-gallon pail, SKU 5060497179271, is $244.00. A 1-gallon size is listed at $75.00. The copy says it bonds to metal, wood, concrete, and RV roofs without a primer and is applied in a heavy coat on a clean surface, which makes it a candidate for metal-roof laps, flashings, and localized repairs in high heat. It is not a specification for coating weathered asphalt shingles, and it should not go over an incompatible existing coating without checking the label. The listing does not state a coverage rate, so calculate coverage from the pail or by asking us before you buy a job quantity.

For a true low-slope reroof, the catalog has a white, self-adhered TPO membrane. TPO Plus Self Adhered Roof Membranes are 60-mil thermoplastic polyolefin sheets with a factory-applied adhesive and a hot-air-weldable uncoated edge. Two sizes are listed: 5 ft × 100 ft × 60 mil, SKU 8414, 500 square feet, $1,440.00; and 10 ft × 100 ft × 60 mil, SKU 8416, 1,000 square feet, $2,853.33. The page allows installation only at 50°F or rising, on a clean insulation or underlayment surface. White TPO is a common low-slope choice in Texas because the sheet is the waterproofing and the light color reflects sun. These rolls typically ship as freight.

Fasteners

Nail length has to pass through the shingle — and any existing layer on a reroof — and into the deck far enough to hold, commonly through 7/16-inch or 15/32-inch OSB or plywood, or at least 3/4 inch into thicker lumber. The shingle manufacturer’s instructions control the pattern and minimum penetration.

Coil Roofing Nails, Electro-Galvanized, Smooth are wire-coil nails, 7,200 per box, with a coating the listing says meets ASTM F1667. Lengths and prices are 1 in. (SKU 611050, $27.44), 1.25 in. (SKU 611070, $22.44), 1.5 in. (SKU 611090, $32.44), and 1.75 in. (SKU 611110, $34.94). Use them in a compatible nailer for inland field shingles. For hand work, or a heavier zinc coating, HandDrive Roofing Nails, Hot-Dipped Galvanized, Smooth are listed in 1.25 in. (SKU 69072, $58.69) and 1.5 in. (SKU 69092, $99.94). That page cites ASTM F1667 and A153 but does not state a piece count, so confirm the pack quantity before comparing unit price with the coil box. Hot-dipped coatings are the more conservative choice near salt air; electro-galvanized coil nails are the usual inland fastener. Metal-to-wood screws in this catalog are for metal panels, not shingles.

Ordering and freight

Shingle bundles, pails of coating, and underlayment or TPO pallets are bulky and often ship LTL from the partner vendor, with a carrier-calculated rate rather than a flat parcel charge. The rate and any liftgate or residential options appear at checkout before you pay. Color availability can vary by location, and a few items (Raptor is one) list geographic restrictions. If you are unsure whether a product fits, email info@meetmanu.com or call (210) 857-3040 before you order a full takeoff.

Frequently asked questions

How many bundles of shingles do I need?

Divide the roof area in square feet by the coverage on the bundle you are buying, then add waste. 33.3-square-foot bundles take three bundles per square; 30.76-square-foot TAMKO lines take 3.25; XT 25 takes about 3.08. Add 10 to 15 percent or more for waste, plus starter and ridge.

When should I buy impact-resistant shingles in Texas?

If the property is in a hail-prone part of the state, or if an insurer or official asks for an impact rating, use a shingle that states a published classification. Heritage IR is listed as UL 2218 Class 4. Confirm the requirement with the insurer and the manufacturer’s instructions; this guide does not replace either one.

Is synthetic underlayment enough, or do I still need ice-and-water shield?

On a typical Texas steep-slope roof, a synthetic field underlayment such as Grayhawk is the usual deck covering under shingles or metal. Ice-and-water membrane is still useful in valleys, around penetrations, and on low-slope transitions, and it is standard at eaves in cold climates. A dedicated ice-and-water product was not in this catalog when the guide was written.

Can I coat an asphalt shingle roof with silicone instead of replacing it?

The Flex Repair silicone listing is written for metal, wood, concrete, and RV surfaces, not as a restoration coating over granules. A failing shingle roof is normally replaced, or, if it is low-slope, covered with a membrane such as the 60-mil TPO Plus sheet. Use the coating where the label’s substrates match the surface you have.

What nail length and coating should I use?

Choose a length that meets the shingle manufacturer’s penetration rule after any existing layers are counted; 1.25-inch and 1.5-inch are the common stocked sizes here. Electro-galvanized coil nails (7,200 per box, ASTM F1667) are the inland production fastener. Hot-dipped galvanized hand-drive nails (ASTM F1667 and A153) are the more conservative coating when the roof sees salt air.

Will these roofing materials ship in a small parcel?

Some accessories may, but shingle bundles, underlayment pallets, and TPO rolls often move as LTL freight from the partner vendor. The carrier-calculated charge is shown at checkout. No transit time or freight cost is promised in this guide.