Mansard Roof Ventilation Details

To insulate the roof you will need to use a combination of insulation to fully protect the roof.

Mansard roof ventilation details.

Step 1 add a vapor barrier. It has almost no ventilation just a few vents under the eaves and the asphalt shingles installed in 1994 are badly deteriorated. Mansard roof with mansard tiles. Lap the roof underlay over the mansard underlay by minmum 150mm.

However unlike a traditional mansard roof these roofs had a flat top. 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. 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. 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. Ensure that a clear ventilation path is maintained from eaves to ridge where insulation is positioned between the rafters. Custom manufacturing shapes and sizes. 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.

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. What s your main mansard problem. Contact us to submit your specifications or request a quote and we will contact you for further details. Now that you have a clear idea about what a gambrel roof is like let us explore the mansard roof in detail.

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. Design mansard roofs often look dated out of place in a neighborhood or don t match historical details of a dwelling. However on the other pair of sides the mansard roof features the same sloping style. Establish the correct number of courses of mansard tiles to maintain minimum headlap of 65mm.

Airtrak is a proprietary range of ventilators designed specifically for the ventilation of roof voids. Supreme sloped roof ventilator model 301. Every roof is different and even with this roofing different doesn t always seem better. As to that pesky flat as a pancake middle.

Mansard roof vent alcor. It receives the full strength of the summer sun angled right into the sun s rays. More details about this approach can be found in this piece from the building science corporation and in particular figure 3. Gravity unsightly and unsafe most roofing materials are dragged down by gravity.