Construction costs are currently skyrocketing

There is currently a problem with a solar roller shutter. Velux charges 98 EUR for travel, 95 EUR/hour for the technician, 29 EUR for disposal and materials based on consumption in customer service. The solar set (I assume this is what we need) costs 400 EUR for this type of window. So. We googled, opened the window (safely possible, you don’t have to go outside or lean out in our case), after 5 minutes the old battery was out, we can buy the new one for about 100 EUR and then reinstall it.

Be glad it wasn't a frequency converter... my hourly rate is now over 200 EUR for non-regular customers. Travel time is charged based on effort.

We are currently insulating the roof - in DIY mode. My husband is quite skilled with crafts; in his "younger years" he helped out on construction sites. He said he installs the insulation much more precisely than the craftsman. That’s true as well. No craftsman is as meticulous as my husband. The vapor barrier is perfectly glued. No craftsman has worked so cleanly for us so far. Of course, the whole thing takes much longer. For a 135m2 gable roof (at the highest point you had to work on scaffolding over 6m high) we worked with one helper for 2 weekends... Cost factor? 3k all in (slab insulation 240cm, climate membrane from ProClima + suitable tapes and adhesives). How much would a craftsman charge for the work? Do you have reference prices?

my hourly rate is now over 200 EUR for non-regular customers

That is seriously a lot, congratulations on the high salary! Are you an electrician?

You can’t really go wrong with a little bit of info. And if you do, you can always correct it anytime. This is the best place to practice. Do you want to cover the entire floor? What kind of subfloor do you have? In an attic, probably the roof trusses or rafters? You can screw directly onto those. Buy floorboard screws and screw into the tongue. Start at one side, screw down the board, attach the next one, screw again. Leave a 1 cm gap wherever it borders other components. Stagger the boards like laminate.

No, please don’t. The insulation underneath must necessarily be ventilated.

Someone looking for cheap electricity? For under 30ct/kWh it should be possible with Elli Naturstrom and don’t forget the code „Volkswagen50“ for a 50€ new customer bonus. The tariff „Blue“ is the more lucrative one.