Explain Roll Blocks in Roofing

Roll Roofing

• Roll roofing in general is any type of roofing that you can roll out across the roof surface. These coverings are handy, but are made to form substrates, not the final layer of roofing material. Felt paper, for example, is a common type of roll roofing. Plastic membranes also fit the definition. These materials help provide insulation for the roof while keeping moisture from accessing the vulnerable roof framework, if leaks make it past the outer layer or shingles or tiles.

Roofing Advantages

• Roll roofing, in addition to its primary purpose, carries several other advantages for roofers. It tends to be lightweight, but some varieties come in higher weights for added protection. For temporary shades, it can be used as a primary roofing surface, and can keep roofs protected in poor weather for partially finished residential projects. For flat roof tops, roll roofing can be used to create a slight incline, allowing water to spill down one side instead of pooling.

Blocks and Protection

• Roofing blocks are supports and protectors that can be used in combination with membrane roll roofing or similar materials. Some blocks are installed to serve incline purposes. They help slant the roof membrane or underlayment on flat rooftops. Others are plastic shields that are installed over roof outcroppings or other strange sections that cannot simply be covered by the roll roofing, but need a separate plastic housing for protection.

Considerations

• Support blocks for roofing come in several styles. Choose a block designed for the roll roofing materials you are using. Sealants or flashings can help bond the roofing layer and any support blocks together without creating cracks that might promote leaks. If the block will be supporting weight instead of covering an outcropping, ensure the block is rated to handle the right amount of weight without suffering damage.