After 7 years of wear, your roof should be inspected. A well-installed roof can last 20-40 years. Contact us for a free estimate.

The cost of your new roof will depend on factors such as the size, shape, slope, and the number of existing roof layers. For a precise estimate tailored to your roof’s specifics, call us at (818) 847-0470 or fill out our free estimate form.

Yes, it’s possible to lay new shingles over an existing layer, but this depends on the condition of your current roof, how well it was originally installed, and what type of composition shingle it is. If the existing shingles are uneven, misaligned, or have started to cup, the new layer may end up looking bumpy or uneven.

Another important factor is that keeping the old layer prevents a full inspection of the roof deck for potential issues like heat damage, rot, or loose decking. Although you can check for visible damage from the attic, loose decking may not be obvious. Moisture can cause the wood to swell and shift over time, loosening nails and creating an uneven surface that may impact the durability of your new roof.

Yes, we are fully insured with $2,000,000 liability insurance and $1,000,000 Workers Compensation insurance policies.

At Shea Roofing, Inc., we handle everything for you—from the initial estimate to installation, including pulling permits and covering the necessary taxes. All you need to do is select the color and style of your new roof, and we’ll take care of the rest.

No. Shea Roofing thoroughly cleans the site after every job, using magnetic rollers to collect any debris.

Proper ventilation is crucial to roof longevity. Contact us for a consultation to ensure your roof is well-ventilated.

Deck/sheathing: The surface, usually plywood or oriented strand board (OSB), to which roofing materials are applied.

Dormer: A small structure projecting from a sloped roof, usually with a window.

Drip edge: An L-shaped strip (usually metal) installed along roof edges to allow water run off to drip clear of the deck, eaves and siding.

Eave: The horizontal lower edge of a sloped roof.

Fascia: A flat board, band or face located at a cornice’s outer edge.

Fire rating: System for classifying the fire resistances of various materials. Roofing materials are rated Class A, B or C, with Class A materials having the highest resistance to fire originating outside the structure. All of our roofs are Class A Fire Rated.

Flashing: Pieces of metal used to prevent the seepage of water around any intersection or projection in a roof system, such as vent pipes, chimneys, valleys and joints at vertical walls.

Penetrations: Vents, pipes, stacks, chimneys-anything that penetrates a roof deck.

Rafters: The supporting framing to which a roof deck is attached.

Rake: The inclined edge of a roof over a wall.

Ridge: The top edge of two intersecting sloping roof surfaces.

Sheathing: The boards or sheet materials that are fastened to rafters to cover a house or building.

Slope: Measured by rise in inches for each 12 inches of horizontal run: A roof with a 4-in-12 slope rises 4 inches for every foot of horizontal distance.

Square: The common measurement for roof area. One square is 100 square feet (10 by 10 feet).

Valley: The angle formed at the intersection of two sloping roof surfaces.