Preventing roof leaks for your flat roof

Preventing roof leaks for your flat roof
April 18, 2017

The best way to prevent roof leaks in the wetter seasons is to be proactive with your roof maintenance in the months before the winter period.

Around this time of year in Autumn is when home owners should begin a through clean of their gutters, outlets and leaf catchers. One of the main reasons for roofs leaking is a build-up of organic matter causing water ponding and the blockage of water channels.

Flat roofs are designed to a specific fall and naturally they are supposed to dispel water, but when they aren’t maintained, problems may arise. The size and location of the roof will determine the drainage design requirements as each home is unique.

Nuralite’s membrane systems have all achieved CodeMark certification recently. The scope and limitations of the Nuraply 3PM CodeMark state the minimum finished fall for a roof shall be 1:80 (0.73 degrees). Due to inconsistences and tolerances in construction, Nuralite recommend that the design falls are 1:40 (1.5 degree) for plywood and 1:60 (1 degree) on concrete.

The scope and limitations of the Nuraply 3PM CodeMark for timber substrate is: 17mm plywood for roofs, 21mm plywood for decks, supported at 600mm centres each way.

With steeper pitches increasing the speed in which the rainwater drains into the gutter and downpipe system, architects need to consider relevant slopes to ensure flat roofs are pitched appropriately to cope with heavy rainfall.

Regions across New Zealand are subjected to varying levels of rainfall intensity which in turn affects the capacity required and the appropriate number of downpipes or outlets. The New Zealand Building Code requires that a rainwater system design be able to cope with the level of rainfall intensity that has a 10% chance of occurring once a year for 10 minutes.

Cleaning gutters and downpipes before problems arise is the advice we give to those with flat roofs or homes in general, especially in Autumn when the weather starts to change. With yearly maintenance and a correctly designed sloped roof, there shouldn’t be any issues with leakages.

Latest News

High Wall, Floor Console, Ducted? What heat pump is right for me?

April 18, 2017 Autumn is upon us, and with longer nights and colder days, it’s important to ensure... Read more.

Intelligent thermostats for Electric Floor heating

April 18, 2017 Summer’s officially over and the crisp autumn mornings can sometimes feel particularly cold. It is... Read more.

Tongue and Groove Soffit Lining Helps to Make Your House Stand Out

April 18, 2017 We all look for the X-factor that will make our new home stand out from... Read more.

Preventing roof leaks for your flat roof

April 18, 2017 The best way to prevent roof leaks in the wetter seasons is to be proactive... Read more.

Is your lounge hot – but your bedrooms not? HeatTrans can help…

April 18, 2017 Now the colder months are upon us, keeping our homes warm at minimal cost is... Read more.

FPB - Future Proof Building Principals
Energy Smart Health & Safety Life Cycle Quality Smart & Secure Sound Control Spatial Design Sustainability