Decks & Patios in Altadena
Altadena decks and patio covers framed on engineered footings, with enclosed undersides and ember-resistant boards for lots in mapped fire areas.
A fair question at the first walk through an Altadena yard is whether the space under a raised deck can hold storage. Fire hazard mapping reaches into parts of Altadena, where a lot may have to meet ember-resistance rules, and an open, cluttered underside is where embers gather. The answer depends on the map and on how the sides of the frame are closed, and it should be settled before the joists are drawn.
Enclosing the underside
Where rules apply, the sides of a raised deck are closed with noncombustible mesh or solid metal skirting, which keeps embers out and lets air move through so the framing stays dry. The enclosed space is meant to stay empty. Stored paint, fuel, cardboard or firewood turns a closed box into fuel. Wherever storage matters, a shed placed apart from the house, or a bench with a lid on the deck surface, gives the same capacity without the risk. A framed access hatch, also covered in metal, lets someone inspect the cavity for debris whenever needed.
Boards, rails and the house wall
Decking with a fire test listing goes on top, and the listing sheet travels with the plans. Next to the house, a strip of noncombustible material or exposed metal flashing sits where deck meets siding. Posts, rail caps and stair parts follow the same ember-resistant logic. A lot outside the mapped area follows ordinary code, and the choice of surface returns to taste and upkeep. Either way, the written scope states which materials were chosen and what each one is meant to resist, so the choice is clear before building starts.
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Decks & Patios in Altadena: questions
Footing depth shows on the drawings and is measured below undisturbed soil, with code setting the floor. Posts that stand tall, soft fill or a buried line change the figure. An inspector looks into each hole before concrete goes in, and the footing size matches the load the post carries.
Cladding is cut away along the ledger line, the board bolts into solid rim framing, and flashing lies over the top edge. In a mapped fire zone the flashing is metal and the joint stays clear of anything that burns. If the wall cannot take bolts, a row of posts holds the deck beside the house.
Altadena is unincorporated, so the county building department reviews and inspects a raised or attached deck. Plan check covers footing sizes, the ledger detail and guards, plus ember-resistant materials where the parcel is mapped. Inspectors visit the holes and framing as work progresses.
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Book an inspection in Altadena
Describe the house and what it needs. We look at the structure first and send the quote in writing.

