ADU Construction in Monrovia, Steel Roof Down
Monrovia ADUs under a standing-seam steel roof with ember-resistant vents where mapped, and framing carried down to footings set for the grade.
A standing-seam steel roof suits a Monrovia ADU well. Installed over the right underlayment it earns a Class A fire rating, its raised seams leave no gaps for embers to lodge in, and a light factory finish reflects strong sun away from the attic. It also sheds rain quickly, which helps if the unit sits above a drop. We pair it with closed eaves and ember-resistant vents.
Seams, flashing and the attic
Steel panels run from ridge to eave in one length where the roof allows, so no cross joints collect water. Clips fixed under the seams let the metal expand in heat without tearing fasteners loose. At the ridge and eaves, closures fill the panel ribs so embers and birds cannot get in. Where a parcel in Monrovia lies inside a mapped fire hazard severity zone, the attic vents need ember-resistant screening, and soffits are closed with noncombustible board. The roof plan lists each of these parts, so the inspector can check them against the approved drawings.
What carries the roof on a grade
Under the steel, rafters or trusses bring the roof load down to walls that rest on the foundation. Where the grade falls across the footprint, a taller concrete wall along the downhill edge makes up the difference, and piers take over where the soil near the surface is weak. An engineer sizes the hold-downs and shear walls from the soils report and the wall heights. The city building department reviews that load path, and its inspector checks the reinforcing steel before each pour. Roof framing follows once the foundation inspection passes.
About our adu construction workEverything we build in Monrovia
ADU Construction in Monrovia: questions
For a sloped Monrovia lot, the roof and walls can go wherever the foundation can, so the search starts underground: soil that bears, a waste line with fall to the house, and enough room inside the setbacks. We stake the spots that pass and note how deep the concrete would go at each.
Yes, when a qualifying design keeps to one floor and 500 square feet, with drawings made for plan check. On a Monrovia lot that the fire hazard maps include, the wall sections carry the roof, vent and soffit details the reviewer reads closely. Beyond the package, a sloped site's engineering and the construction work carry separate quotes.
Height on the downhill side leads, since every extra foot of concrete wall adds steel, forms and pour volume, and a cut pad needs a retaining wall. A steel roof and ember-resistant vents cost more than basic materials, which matters on a mapped parcel. Our quote breaks out the foundation from the roof.
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