Mansard Roof Ventilation Details

More details about this approach can be found in this piece from the building science corporation and in particular figure 3.

Mansard roof ventilation details.

Every roof is different and even with this roofing different doesn t always seem better. Supreme sloped roof ventilator model 301. Step 1 add a vapor barrier. Contact us to submit your specifications or request a quote and we will contact you for further details.

Ensure that a clear ventilation path is maintained from eaves to ridge where insulation is positioned between the rafters. As to that pesky flat as a pancake middle. This detail shows the condition where the bottom of the mansard meets another roof. Later on many small commercial buildings also adopted a mansard style roof.

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. Gravity unsightly and unsafe most roofing materials are dragged down by gravity. Just like the gambrel roof the mansard roof features a similar slope design on two opposite sides. Mansard roof with mansard tiles.

However on the other pair of sides the mansard roof features the same sloping style. 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. It has almost no ventilation just a few vents under the eaves and the asphalt shingles installed in 1994 are badly deteriorated. What s your main mansard problem.

My house has a mansard roof. However unlike a traditional mansard roof these roofs had a flat top. 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. To insulate the roof you will need to use a combination of insulation to fully protect the roof.

Now that you have a clear idea about what a gambrel roof is like let us explore the mansard roof in detail. One of the best ways to protect your mansard roof from the problems of ventilation is to use a vapor barrier on the inside. Lap the roof underlay over the mansard underlay by minmum 150mm. 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.

Mansard roof vent alcor. Airtrak is a proprietary range of ventilators designed specifically for the ventilation of roof voids. It receives the full strength of the summer sun angled right into the sun s rays. Design mansard roofs often look dated out of place in a neighborhood or don t match historical details of a dwelling.