Problem Roofing Materials

FireFree® Plus PMFC (Polymer Modified Fiber Cement) roofing, which is rated a Class A fire-rated material, is made from a blend of cement, cellulose fiber and aggregate materials.  The individual roof tiles are coated with a polymer resin that penetrates below the surface layer and encapsulates all six sides of the material.
The roofing shakes in question were manufactured between 1993 and 1997, and are now off the market.  The two product lines of FireFree® Plus roofing — Rustic Shake and Quarry Slate — were produced in a limited variety of colors.  The Rustic Shake line was molded to resemble rough-sawn or split cedar shake, and the Quarry Slate line was molded to resemble traditional slate roofing.
As with all cement-based products, FireFree® roofing products are subject to breakage due to the fact that the products cure longer than others.  This results in a slightly stiffer product that is more capable of withstanding breakage usually associated with shipping, delivery and roof loading.  However, the materials are more brittle, which presents breakage concerns during installation.
Because the tiles are tapered from the bottom edge to the top, they are more brittle at the top.  Breakage may occur if walked on, even by experienced roofing specialists or contractors.  Under common roofing conditions, this is not a problem as the top of the tile is covered by the next applied row.  However, a  edges can exist when the tiles are installed in a valley, which can leave the top edges and untreated cut exposed to the elements.    In order to positively identify problems, the tiles must be removed, and problem replacement or repair is rather difficult.  Photo  below was taken during a home inspection in Colorado Springs.Roof issues during Colorado Springs Home Inspection.  Pretty Typical

Woodruf™ roof shingles, a fiberboard roofing product, were a Masonite™ roofing product consisting of “pressure bonded fibers designed to resemble natural cedar roofing” sold in the United States into the 1990′s and have also been found installed on homes in Canada.

The roofing shingle product was produced in four-foot sections that were 12″ wide and with a nominal thickness of 7/16″. The actual thickness varies due to raised ridges that give Woodruf™ shingles the appearance of a wood shake or shingle.

Our sources indicate that Woodruf™ shingles were marketed with a 40 year life expectancy. As of this article’s last update (July 2010) there is no warranty service remaining on this roofing product.


Masonite Woodruf roofing on steep slope roof -

Masonite Woodruff roofing – Inspection Conducted Near Colorado Spring

The Woodruf™ shingle fiberboard was treated with a water repellant and a bonding agent to permit outdoor exposure. This product is softer than Masonite’s hardboard products and to remain durable required an installation that permitted good roof drying (similar to the requirement for wood shingles or shakes). This is particularly true because the factory edges as well as any cut edges made during installation were not sealed.

Masonite Woodruff roofing was intended for steep slope roofs and should not be installed on slopes lower than 4″ of rise in 12″ of run (a 4/12 roof). The shingles were to be installed over roofing felt on a sound roof deck, with a 9″ shingle exposure and requiring eight nails per roofing panel.




T Lock Shingles

T-lock shingle is an interlocking shingle that doesn’t have a tar strip but instead uses an interlocking design to hold them in place. T-Locks have been widely believed to be more wind-resistant than seal-down shingles because of the overlap system, but they are frequently assigned the same tested wind-resistance rating as a 3-tab or architectural shingle of the same warranty period. T-Lock shingles have been discontinued by the manufacturer and can no longer be repaired as material is no longer available. T-Lock shingles were discontinued in 2006 and as such trying to find replacement shingles for your roof is next to impossible.  Photo seen below was taken in Colorado Springs.