Duplex Roof

Installation and Repair

Duplex Roof Installation



Duplex buildings are commonly known as two-family dwelling units sharing common assets such as the land, roof, walls, patio, siding, parking, and so on. Duplex houses are popular in cities and areas with high real estate demands. They serve the housing needs and reduce the cost for the owners. Duplex buildings have varied definitions in different parts of the USA. Semi-detached buildings with common walls are popular in duplex houses. Three to four floor plans are also common in duplex buildings.

Installing duplex roofs is a large project as it includes roofing for two units. Material and labor planning must be done in order for the roofing to be completed as per timelines. Since the roof is shared between the units, the installation must be performed keeping future repairs or maintenance in perspective. Duplex roofs are installed as per the local building rules, manufacturer recommendations, city guidelines, and other regulations.

Duplex Roofing

Duplex Roof Challenges

Duplex Roof Challenges

Duplex roofs face challenges in terms of maintenance and re-roofing. The owners must have a common maintenance agreement in order for the roofs to be intact. If only one owner decides to re-roof, the other part of the roof might get affected. The newly installed roof also might not function as expected due to the incompatibility at the joints. In such cases, both owners consent must be sought before taking up the duplex roofs repair.

Similarly, when one owner decides to sell their unit and needs to upgrade the roof, the other owner is also forced to do so. If an owner is keeping the duplex as a vacation home, the roof maintenance also must be planned so that the other owner's roof is not damaged due to the negligence of one part of the roof.



Duplex roofs are limited by the home owner association rules and have similar product installed. If they are re-roofed at different times, the product might not look seamless. Further, different color shingles are not possible for duplex roofs. Maintaining the curb appeal is a crucial aspect of duplex roofs. Other challenges of duplex roofs involve maintaining the attic temperature in a similar way in both the units. Since the moisture of the roof largely depends on the interior attic ventilation, the temperature in both the houses must be maintained in a similar way.

If the part of a duplex roof is damaged by a tree fall or thunderstorm, that has to be fixed immediately. Molding, curling, streaking, or missing shingles must be replaced with a matching product. The entire duplex roof might be effected if any roofing problem is left unattended.

Duplex Roof tips

Duplex Roof Best Practices

Duplex Roof Best Practices

Duplex roof repair or replacement is a crucial activity as it involves two owners. Roofing contractors must take care that the other half of the roof is not disturbed while working on one half. Here are some best practices for duplex roofs.



  • Seek approval or consent from the other owner
  • Take before and after pictures to avoid any future litigations
  • If only one half of roof is being repaired, make sure the joints are seamless and leak free
  • Procure similar material to patch up the shingles that must match the other roof
  • The joints can be patched up by the hip ridge shingles to mark the boundary
  • Any chimneys or vents at the boundary must be checked for compatibility while repairing
  • Specify the risks in the contract and notify the owner of any additional issues

Duplex roofs are challenging as the multiple owners may raise concerns about the roofs. The availability of the other owner is also a problem. Involving both the owners and re-roofing the entire roof is ideal. However, if only one owner is involved, taking appropriate measures would help avoid any future issues.

Duplex Roof Contractor

Olde Town Group

Olde Town Group is the leading contractor in the MidWest who are experts in installing and repairing duplex roofs. They have worked on several residential, commercial, and government duplex roofs. The family owned business is known for their top quality products and services.


Olde Town Roofing

Olde Town Roofing is their roofing division offering top quality roofing products and services. Olde Town Group has headquarters in Moline, IL and operate around 200 miles of Quad Cities. Their main roofing services include duplex roofs, apartment roofs, church roofs, condo roofs, hotel roofs, restaurant roofs, and so on. They undertake all residential and commercial roofing in steep-slope roofs, metal roofs, flat roofs, cool roofs, energy efficient roofs, architectural shingles, and so on. Olde Town Roofing is a certified Shield Pro Plus contractor from IKO and have installed thousands of roofs in the region. They are a certified SELECT Shingle Master from CertainTeed and Certified installer of IB Roof Systems.


Olde Town Roofing Certified Contractor

Siding is another important service from Olde Town Group. They partner with James Hardie siding to the residential, commercial, and government buildings. Olde Town Group also installs decks and other home improvement projects. As a General Contractor, they also work on duplex siding and duplex remodeling. Olde Town Group have completed some of the largest dupex roofs in the Mid West. Contact Olde Town Group at 309-517-1676 or 309-738-5550 for more information.


Here is a brief introduction about Olde Town Group services.