Schrijver damp control

[Jim Hawkins]

Has anyone tried this system of drying out damp walls ?

Jim Hawkins

[NT]

A C shaped bit of copper tube in the wall is presumably cheaper. However the ratio of damp condensation to heat loss is likely to be pretty poor. People that look for overpriced ineffective proprietary damp control systems dont understand damp. I'd start by telling us the cause, or if unknown, where the damp is.

NT

[Jim Hawkins]

9" brick garage converted to a workshop. Roof recently reslated over new membrane Walls sound, and painted inside and out with white Sandtex. Floor is smooth concrete with floor paint. New aluminium rollup door. No obvious signs of damp yet, but I'd like to keep the humidity as low as reasonably possible.

Jim Hawkins

[stuart noble]

Sounds like you just need some insulation on walls and ceiling. Allegedly a thin layer of closed cell foam will do it if you don't want to lose space, or possibly cork tiles

[NT]

A closed copper pipe stuck through the wall would do the same, yes it would condense a little out, but not much. And if you use it as a workshop you'll lose heat. A better way to get low RH is with a dehumidifier, if you're not heating it all the time. Insulation wont remove any water vapour.

NT

[stuart noble]

It would stop it condensing though. It would all end up on the aly shutter, which wouldn't matter

[Andrew Gabriel]

As the air temp/humidity changes, and the temperature of other things lags behind, there will be occasions when it condenses on anything with a high heat capacity (metals in particular).

Dehumidifier would work, except many become ineffective when temperature gets low enough that the dehumidifier's evaporator coil will freeze. I've heard the disk type work better at low temperatures, but I've never used one of those.

[NT]

The issue is that insulating a lightly built structure doesnt give any extra thermal capacity, so temp will still fall. And winter still happens, insulation simply wont stop it getting cold and damp.

Once it gets down to 12C the usual refrigeration ones are little use.

NT

[Jim Hawkins]

Is that 12C correct ? Or did you mean around 1 or 2C?

[NT]

12

[The Natural Philosopher]

It will with minimal heat input..