Frequently Asked Questions

FROM THE SOUTH:

Take I-95 to exit 127 and take a right off the exit. Go 1.5 miles until you get to your sixth light. Go through your sixth light and yield to your right; sign says south to 201 and Route 137. Go across the bridge and take a left at your first set of lights. This will put you North on Route 201. Go 9/10ths of a mile until you reach another set of lights. Take a left at this set of lights between a small diner and a used car lot. We are the 4th place in on your left.

FROM THE NORTH:

Take I-95 to exit 127 and take a left off the exit. Go 1.5 miles until you get to your sixth light. Go through your sixth light and yield to your right; sign says south to 201 and Route 137. Go across the bridge and take a left at your first set of lights. This will put you North on Route 201. Go 9/10ths of a mile until you reach another set of lights. Take a left at this set of lights between a small diner and a used car lot. We are the 4th place in on your left.

Yes we do! Whether your looking for a home or garage design we can help. We will turn your dreams into reality using our drafting and design services. Bring us your ideas, rough sketches, photos, etc. and we will provide you with a complete set of blueprints.

Yes! Most often this delivery is on the same day. Whether your looking for a quick load that we can run out in a pick-up, a larger load that requires a dump body truck, an interior package that requires an enclosed van with a lift gate, or a roofing load that needs to be lifted up on the roof using a boom truck we have the right vehicle to get you your product wen you want it and where you need it.

Without specific brand information provided, most building supply yards stock major manufacturers like GAF, CertainTeed, Owens Corning, and IKO for asphalt shingles, plus metal roofing options from standing seam and corrugated panel suppliers. Product availability varies by location and contractor demand. Call 207-873-6467 to confirm current inventory and whether specific brands or products are stocked or available through special order.

Most building supply operations provide delivery services to active job sites within their service radius, though delivery fees, minimum order requirements, and scheduling vary by order size and location. Roofing materials are typically delivered on flatbed trucks and can be boom-lifted directly onto roof decks when accessible. Contact McCormack Building Supply at 207-873-6467 to confirm delivery availability, scheduling, and any fees for your specific project location.

Building supply yards typically serve both professional contractors and retail customers, though pricing structures may differ between trade accounts and cash sales. Some locations require contractor licenses for certain wholesale pricing tiers but sell materials to homeowners at retail rates. Product knowledge support and technical guidance levels may vary based on staff availability. Call 207-873-6467 to confirm purchasing policies and whether homeowner sales are accommodated.

Material suppliers generally provide pricing quotes based on measurements and product selections you provide, but this differs from contractor estimates that include labor and installation. You'll need roof measurements-square footage or number of squares-plus details like pitch, valleys, and penetrations for accurate material counts. Building supply staff can calculate materials needed if you provide dimensions, though some locations charge for detailed takeoffs on complex projects.

A roofing square covers 100 square feet of roof area, while bundles are how shingles are packaged for shipping-typically three bundles per square for standard architectural shingles. Calculating in squares accounts for roof area; bundles determine truck loading and manual handling. Always order 10-15% extra for waste from cuts, valleys, and ridge caps, which increases total bundle count beyond basic square footage calculations.

Measure roof length times width for each plane, convert to squares by dividing total square footage by 100, then add waste factor. Complex roofs with multiple valleys, dormers, or steep pitches require 15-20% waste allowance versus 10% for simple gable roofs. Don't forget ridge cap, starter strips, underlayment, drip edge, and flashing-these aren't included in shingle square calculations and must be ordered separately based on linear footage.

Asphalt-saturated felt has been standard for decades, available in 15-lb or 30-lb weights, but synthetic underlayment offers better tear resistance and UV protection if roof deck is exposed during installation delays. Felt costs less but degrades faster when exposed to weather. Synthetic stays flat, doesn't wrinkle, and provides better traction for roofers. Building codes in some regions now require synthetic for certain applications, especially in high-wind or ice-dam-prone areas.

Ice and water shield-a self-adhering waterproof membrane-is required by most building codes along eaves in cold climates to prevent ice dam leaks, typically covering 3-6 feet up from the roof edge. It's also essential in valleys, around chimneys and skylights, and along rakes on low-pitch roofs. The rubberized backing seals around nail penetrations, creating watertight protection where standard underlayment would allow water infiltration through fastener holes.

Three-tab shingles are flat, uniform, single-layer products that weigh less and cost 20-30% less than architectural shingles but carry shorter warranties-typically 20-25 years versus 30-50 years. Architectural shingles use laminated layers that create dimensional texture, better wind resistance (often rated to 110-130 mph versus 60-70 mph), and improved hail impact ratings. The extra weight and thickness also provide better durability in freeze-thaw cycles and high-temperature climates.

Building codes in most areas allow one re-roof over existing shingles if the deck is sound and current layer count is one, but this adds weight, traps moisture against the deck, and shortens new shingle lifespan because surface temperatures run hotter. Tear-off allows deck inspection for rot, proper underlayment installation, and flat substrate for new shingles. Re-roofing over old material voids some manufacturer warranties and makes future tear-off more expensive due to doubled removal labor.

We are located at 8 Lithgow Street in Winslow, ME.