Mansard Roof Ventilation Details

Custom manufacturing shapes and sizes.

Mansard roof ventilation details. Supreme sloped roof ventilator model 301. Well what you re dealing with is no different challenge wise than a commercial flat roof and i d suggest reading up on flat roofs and parapets to deal with it. Now that you have a clear idea about what a gambrel roof is like let us explore the mansard roof in detail. At the lower roof the standing seams are laid flat 8 from the roof break folded 3 4 and secured with copper cleats spaced 12 o c.

Gravity unsightly and unsafe most roofing materials are dragged down by gravity. However unlike a traditional mansard roof these roofs had a flat top. Airtrak is a proprietary range of ventilators designed specifically for the ventilation of roof voids. Lap the roof underlay over the mansard underlay by minmum 150mm.

Later on many small commercial buildings also adopted a mansard style roof. It receives the full strength of the summer sun angled right into the sun s rays. Just like the gambrel roof the mansard roof features a similar slope design on two opposite sides. This detail shows the condition where the bottom of the mansard meets another roof.

Mansard roof with mansard tiles. Mansard roof vent alcor. Mansard roof was not used quite as often in traditional homes despite it was featured in many high rise residential buildings especially in the late 1960s and 1970s. More details about this approach can be found in this piece from the building science corporation and in particular figure 3.

However on the other pair of sides the mansard roof features the same sloping style. Step 1 add a vapor barrier. Copper locking strips of the same weight as the flashing are soldered to the pans between seams at least 6 from the roof break and engage the base flashing in a 3 4 lock. My house has a mansard roof.

What s your main mansard problem. One of the best ways to protect your mansard roof from the problems of ventilation is to use a vapor barrier on the inside. Contact us to submit your specifications or request a quote and we will contact you for further details. Every roof is different and even with this roofing different doesn t always seem better.

To insulate the roof you will need to use a combination of insulation to fully protect the roof. Airtrak assists specifiers builders and specialist contractors in helping them to meet the requirements of the building regulations in relation to the important issue of roof void ventilation and the control of condensation. It has almost no ventilation just a few vents under the eaves and the asphalt shingles installed in 1994 are badly deteriorated. As to that pesky flat as a pancake middle.