Any handyman out there that can help with a DIY question?

[Sam 77]

Liquid nails (a name brand of construction adhesive which comes in a caulk gun tube) would be my choice
Double check whatever glue you choose as some can dissolve foam
You will probably need to brace / put a couple of tapcon screws/nails to hold the board until the bond sets

From your location I thought you would say "super sheva" 

[SHL]

From your location I thought you would say "super sheva" 

Was thinking that but he said he has a garage so assumed he wasn't in my country anymore
Do keep in mind yo7 would want the super7 Hi-Tech
The classic is more of a sealant then a glue

[etech0]

Any recommendations for easy-to-install LED under cabinet lighting that doesn't need a smartphone to turn it on and off?

[yossisch1]

Does anyone have an idea what I can do to a room that is colder than other rooms (Besides buying a heater)

[RLevy]

Does anyone have an idea what I can do to a room that is colder than other rooms (Besides buying a heater)

Balance hvac?
Close unnecessary vents

[yossisch1]

Balance hvac?

Is that a DIY?

[RLevy]

Balancing no
But before you do that try closing all vents that aren’t needed throughout that floor, this way the heat will be pushed to the room that’s not getting as hot.

[notyettaken]

Does anyone have an idea what I can do to a room that is colder than other rooms (Besides buying a heater)

Switch the HVAC fan (on your thermostat) from auto to on. (assuming a forced air system)

[AYHG]

Recently came across this product https://www.amazon.com/Pomeney-Register-Adjustable-10-Speed-Thermostat/dp/B0D2N7VDM2/?th=1, a vent register fan meant to increase airflow to a specific vent.

There are oodles of sellers on amazon selling these things in different sizes and specs, and some reviewers say they work.