Unanswered Questions

6,962 questions with no upvoted or accepted answers
6
votes
2answers
327 views

What should be used between a concrete tub and wall tile?

I have an older home that has a large, decorative concrete bathtub/shower with tiled enclosure walls. The walls behind the tile and tub are poured concrete. (Yes, the house is very sturdily built.) ...
5
votes
0answers
103 views

Aluminum wiring with dark discolouration on outside

We are in the process of doing renovations on a home which was built in the early 70s in Toronto. The home has aluminum wiring in most places except the basement which was completed later. When some ...
5
votes
1answer
202 views

Adding a C wire to older 3 wire

How do I use the green wire as a C wire as suggested in most installation instructions for the newer wi-fi thermostats? They all reference terminal strips at the furnace, all I have is the 3 wire ...
5
votes
2answers
392 views

Should I cut air space in my basement foam board insulation?

I intend to finish a part of my basement following this guideline from Fine Homebuilding and Building Science. In this configuration, the foam board completely contacts the concrete. My conern is that ...
5
votes
2answers
946 views

Are there any advantages to using higher priced sealers?

I want to use a water based sealer on my pavers to bring out the color and also for some resistance against dirt and fading. I went to the store and saw sealers varying in price from about $11 per ...
5
votes
2answers
2k views

How would I ground an internal ethernet surge protector?

I have a Cat-6 cable running to an external PoE security camera that I'd like to have surge protected, but I'm unsure how to ground the protector. It has a prong coming off that I assume is the ground ...
4
votes
3answers
320 views

What do these cracks in my drywall indicate?

I'm trying to figure out what is going on with my house. I bought it back in February, none of these cracks and bulges were there when I viewed the house. The only problem I noticed were uneven floors....
4
votes
1answer
104 views

Why does sink gurgle after installing AAVs in attic?

I recently installed Studor Mini-Vent air admittance valves (AAVs) in my attic on the two secondary (2 inch) plumbing vents (serving laundry room and kitchen) so that the vents no longer penetrate the ...
4
votes
1answer
111 views

Microbubbles on kitchen cabinet doors using HVLP sprayer, how to fix the issue?

We're trying to paint our kitchen cabinet doors white but keep getting a ton of microbubbles in the process. We have primed the doors twice using B-I-N Shellac-Based White Interior Primer and Sealer ...
4
votes
2answers
344 views

Why is one mounting screw left behind each electrical panel's cover?

I have three electrical panels in the house and with each one, one of the face screws is under the cover as seen in the picture. So it's clearly intentional. What's the purpose of it?
4
votes
1answer
118 views

Is this HVAC condensing unit platform acceptable/stable enough?

Our contractor just installed a new A/C system and he built this platform outside our house for the new condensing unit. It looks like it is a 4" concrete slab sitting on top of brick "legs". Looks ...
4
votes
1answer
770 views

Can a vent be started from a wye?

Is it ok to start a vent on a 45 from a wye like on this drawing? I need to clear the edge of the sink (actually a giant double compartment sink) before I can go up and start horizontal once I clear ...
4
votes
2answers
212 views

Why does my light box have 2 cables for this one switch?

Took down a ceiling fixture and discovered what looks like a possible switch loop, except I don’t understand how the connection gets completed with the current set up. Basically, 2 lines coming into ...
4
votes
0answers
135 views

Strange Pin Pierced Pipe in Boiler

Just wondering if anyone had any ideas on this? The other day, I put the central heating on for the first time in about 6 months. The radiators did not get hot and within a few minutes the boiler ...
4
votes
4answers
867 views

What is the proper way to convert a pair of three-way (SPDT) switches into a single two-way (SPST) switch?

I'm in the process of replacing some of the light switches in my house with smart switches, Wemo Light Switches in this case. I've had no problem with the replacement of my One-way switches (SPST I ...

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