Flat Roof Into Pitched Roof Detail

Flat roofs also don t last as long.

Flat roof into pitched roof detail.

Introduction to green roof details a green or living roof is a flat or low pitched roof with a layer of planting over the waterproofing. A very important detail is where the flat roof is connecting the pitch roof. The starter strip and first row of shingles must be applied 25 cm from the bottom of the slope roof or main roof above the slope transition. While that s the easiest route it s certainly not your only option.

Depending on the climate your flat roof will only last between 15 and 30 years if well maintained. Flat roofs can be prone to leakages so if excess moisture is your main concern you may be better off looking for a more durable long lasting epdm roofing membrane. One of the first things you need to consider before converting your flat roof into a pitched roof is the reasoning behind the transformation. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped roof.

However flat roofs require much more aggressive and consistent maintenance than a pitched roof. A 900 square foot flat roof in the san francisco area made of concrete tiles costs. Yet for historic modern style buildings like this old house s cambridge tv project flat roofs are at the core of the architecture meant to reflect the broad horizontal lines of the natural landscape. Armourfix and armourvalley membranes must be installed and extended 60 90 cm up the main roof underneath the shingles in order to assure a waterproof connection.

It is a significant renovation if you are converting from flat to pitched. According to improve net s online roofing calculator a flat roof is significantly cheaper than a pitched roof. Some will choose to keep their pre existing flat roof on their structure underneath the new pitched roof to save removal costs but others might not be able to consider that option. A pitched roof is more expensive.

This green roof details post includes excerpts and details from our book understanding architectural details residential. For instance where flat roofs are converted into pitched roofs during refurbishment projects because the latter allegedly exhibit better insulation characteristics or where flat roofs are not. Of course you don t need to live in a modern house to deal with a flat roof.