Solar panels for your home in Siruseri.

In the older lanes next to the park, the roof in the photo is often still a sheet over the rooms. Concrete appears only where a later floor was added. Modules go on that concrete. The sheet is not drilled. The visit from Madipakkam is free.

The old rooms keep their sheet. Rails are not screwed through it, and that slope is not spare area. Where a later concrete terrace sits beside or above that roof, we mark only the slab, leave the tank and a walkway, and see whether the open area matches the daytime bill. A house that is already all concrete is an ordinary survey. An office block inside the park is a different project.

A car porch under the upper slab is the Kelambakkam case. Mangalore tiles over the rear rooms are the Selaiyur case. A room already standing on one slab is the Injambakkam case. A neighbour's floor still rising is the OMR case. A flat cannot take the common roof of a large block. That is the Sholinganallur case. If the bill is in a tenant's name, the owner still signs, as on the Taramani page. City-wide module choice is on panels for a Chennai home.

The slab added after the old rooms is the only place we draw a row.

A full plant for a Chennai home is described on the solar installation page. The visit is free, and nothing is ordered until you ask. The desk is open monday to saturday, 9:00 am – 7:00 pm.