Light gauge steel vs timber frame: what to choose for a house in Adjara

In Adjara a lightweight frame house is chosen because it is light and quick to build: for a new attic storey on an old house, for a sloping plot, or when the shell has to go up during a few dry weeks. When we weigh up light gauge steel vs timber frame by the sea, we look at moisture first. Both frames cope with earthquakes thanks to their low mass, but they deal with damp and salt differently.

Seismic load and weight

A light house takes a small seismic load, and that is the main advantage of both options. The frame gets its stiffness from sheathing and diagonal bracing, and the house is fixed to the foundation with anchors designed to resist uplift. This detail must appear in the photo report before the walls are boarded, because an anchor without a washer or with a loose nut cannot be seen from outside afterwards.

Otherwise the difference in seismic terms is small. A timber frame forgives minor assembly mistakes. Steel demands precision, but its dimensions are set at the factory and do not change over time.

Salt, damp and condensation

LGS profiles are thin, and only the factory zinc coating protects them. While the frame stays dry and hidden in the wall, that is enough. The weak spots are where the frame is closer to water and salt, at the plinth and near the downpipes, and where the profile is colder than the room air.

Steel conducts heat well. If insulation goes only between the studs, every stud becomes a cold strip, condensation forms on it in a humid climate, and the zinc gets used up from inside the wall. So an LGS frame also gets a continuous layer of insulation on the outside, and the class of zinc coating on the profiles is written into the estimate.

A timber frame is not bothered by salt. Its enemy is damp: in an empty house in winter the timber takes up water from the air, mould gets into it, and over time rot starts at the bottom of the wall, by the sole plate. The protection is well known: kiln-dried timber treated with preservative, a high plinth, a ventilated air gap behind the facade and a vapour barrier without gaps. In Batumi a mistake in any of these will show sooner than in a dry climate.

Light gauge steel vs timber frame: build time and rain

LGS arrives on site cut to length and numbered, and the walls are screwed together without trimming. That is fast if the design is finished, because every change on site means a new profile from the factory. A timber frame is built from boards on site, and a carpenter can make a small change within an hour.

In Batumi most of the rain falls from September to January, and a frame house should not meet it with its insulation exposed. The sequence is the same for both options: frame, sheathing, roof and windproof membrane, and the mineral wool goes in only once the roof is on. On site, the timber and the steel profiles are stacked on bearers and covered, so that they are not lying in mud after a downpour.

Noise, wear and repairs in a rental house

Sound passes through a lightweight wall just as easily in both frames until the acoustics are dealt with: two layers of plasterboard on each side, mineral wool and separate studs between guest rooms. Footsteps from above are damped by a floating floor or a screed on the floor structure.

For repairs, timber is more convenient, because a damaged stud is cut out and replaced on site. In both frames the walls are load-bearing, so a new opening is made only to a design and with the structural engineer's approval. LGS is stricter even about small things: any hole in a profile beyond the factory ones also has to be approved by the engineer. In both cases the walls in the rooms are lined with plasterboard, and dents and holes left by guests are repaired in a day.

Checks if you live abroad

A frame house has more concealed work than a masonry one. The frame, insulation, membranes and fixings are covered by the boarding and cannot be checked later without opening it up. We photograph every wall before it is boarded. For timber it helps to have moisture meter readings on the boards in the shot, and for steel the cut ends of the profiles and the fixings near the plinth.

The photos go into the handover file together with the frame layout. When you need to hang a cabinet or run a cable, they show where the studs are. They also help when you sell, because a buyer can see what the walls are made of without opening them up.