Structural Drying & Dehumidification in North Vancouver
North Vancouver retaining walls stay cold, so cavity air on the joists and daily plate pins decide when the grain log can close overnight.
Lynn Valley walls stay cold where a retaining wall holds the hill. Deep Cove, Edgemont, and Capilano daylight basements carry the same buried concrete. That wall takes longer to give up moisture than the air in the room, so we meter the concrete and the plate at its base every day. Crawl joists under the mid-century houses need a stream inside the bay. A fan in the hall leaves the wood alone.
Norgate crawls get the same cavity air and the same daily pins. Lower Lonsdale concrete, suites and podium slabs, dries with mats, air, and a pinless grid. Grain depression has to show on the LGR or the cold wall will just sit. Targets are a dry standard on wood and a quieter patch of the same concrete. Both have to hold overnight on the grain log before the machines come out. We write every pass down. Cold concrete is patient work.
Lynn Valley retaining walls tracked on the grain log
Lynn Valley retaining walls stay cold on the buried side. A comfortable room can still hide a wet plate at that wall. Air movers go up the wall and along the base. The LGR has to hold grain depression against the chill off the concrete.
The grain log gets a pinless line on the wall and pins in the plate each morning. Wood should close level with trim we checked in a room that stayed dry and hold overnight. The concrete should stop outrunning the room and hold a day. A fading depression means we reset the layout.
Deep Cove crawl joists written into the grain log
Deep Cove crawls under mid-century houses stay damp. The joists need a stream inside each bay. Edgemont houses on the same lots match that pattern. Movers go in the cavity with an LGR that can depress the grains down there. We read those bays daily.
The same joists get pins every morning, with inlet and outlet grains on the grain log. Target is a dry joist in the house, a few points off, stable overnight. Rim plates get a pin when the meter climbs there. The pins decide when it is dry.
Capilano cavity air recorded on the daily grain log
Capilano daylight basements hold moisture in the uphill cavity. Norgate crawls still need bay air on the joists. We open what we must, aim movers into the cavity, and keep an LGR on the grains. The plate at the slab gets pins because it trails the rest.
The grain log shows cavity wood, plate wood, and grain depression side by side. Wood targets sit near a dry standard from the house and hold overnight. A pinless check joins the log if the slab got wet. Flat grains mean the LGR needs a new spot.
Lower Lonsdale concrete suites held on the grain log
Lower Lonsdale suites are concrete. A stack leak wets the slab and the party wall, and the hall feels fine while the deck is loaded. Mats and air cover the face, and an LGR has to show grain depression. Podium slabs get the same grid when the water travelled down.
Daily squares and grains fill the grain log. Wet areas should close on a drier patch and stay overnight. Wood bases get pins aimed at a dry standard. Equipment remains while the grid is still sliding. Inlet and outlet grains sit beside every square so the depression is visible.
Questions about structural drying & dehumidification in North Vancouver
Why do Lynn Valley retaining walls stay cold on the meter?
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How should Deep Cove crawl joists get their air?
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What closes the log on a Lower Lonsdale concrete suite?
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Structural Drying & Dehumidification written for North Vancouver houses, including Lynn Valley, Deep Cove, Lower Lonsdale.
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