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Jun
25
comment Is installing a packaged HVAC unit (PTAC) a realistic DIY project?
+1 for stating that you can do duct work at least as good as what is typically done by pros. Every pro-installed home forced air system I've examined closely has had major problems (duct that's too small, no fresh air, no means of balancing, fresh air ported through attic with exposed fiberglass insulation, air path that bypasses filter, etc). The real question should be "If I get a pro to install an HVAC system, how much of it should I expect to have to re-do myself?"
Jun
16
comment How do i resurface my concrete patio?
How deep is the spalling? If you resurface, you'll need to remove all the loose bits. Once you remove those, is there anything left?
Jun
16
revised How do i resurface my concrete patio?
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Jun
16
comment How do i resurface my concrete patio?
I live in British Columbia on the water. I resurfaced my patio several years ago. I get rain, snow, freezing, and salt spray here all winter long. The resurfacing is holding up well -- certainly way better than patio tiles do. I don't think freezing is a fundamental problem for concrete resurfacing. Rather, bad product selection and application will result in failure whether or not it's subject to freezing temperatures. Freezing might accelerate the problem, but it's not the root cause.
Jun
16
answered How do i resurface my concrete patio?
Apr
5
comment Weight load of a hanging 2x4 shelf
+1 for stating that the framing probably won't safely support much weight.
Feb
18
comment Which furnace thermostats support variable swing/deadband?
Venstars have both dead band and cycle per hour parameters.
Feb
8
comment Installing Coax & Cat6 in 2-Gang with Electrical?
No electrical inspector I've worked with allows a mix high and low voltage in a single gang box unless the device in the box needs both (eg. Some thermostats). I've also never seen a UL listed divider. That would be required to comply with most electrical code regulators' requirements. The safe route is to keep low voltage out of high voltage boxes. You generally don't even need a box for low voltage by code.
Nov
29
reviewed Reviewed How can I install a regular light fixture where a ceiling fan used to be?
Nov
29
reviewed Reviewed How can I identify a neutral wire?
Nov
29
reviewed No Action Needed Replace stacked 3-way switched on separate panel circuit
Nov
27
comment Blower fan speed selection
In North America it is rare that residential HVAC systems are rigorously designed. You shouldn't equate what is customarily installed and configured by HVAC technicians as being correct or optimal. Case in point: The dynamic range of motor speeds available in a typical residential furnace is too small to achieve the optimal speed for the full range of conditions. You'd need a variable frequency drive to achieve that (I've retrofitted these), but they are expensive so residential equipment generally just uses the crude relays-and-windings method of speed control.
Nov
19
comment How to attach metal knife rack to tile without ruining tile?
Exactly. Here's a 1/4" diameter example. Here's a 3/16" example. It's the only thing I use for drilling mounted tile. I've cracked tile with pointed bits; never with a hole saw.
Nov
19
revised How to attach metal knife rack to tile without ruining tile?
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Nov
19
answered How to attach metal knife rack to tile without ruining tile?
Nov
19
comment How to attach metal knife rack to tile without ruining tile?
IME small diamond hole saws are less likely to crack tile. They distribute the drilling stress over a wider area and require less material to be removed.
Sep
30
answered How can I 'share' lights between multiple circuits?
Sep
21
comment Is this swing beam safe?
The deflection or strain is not what you should be worried about. Rather, you should be worried about catastrophic failure of your structure which can occur even without visible strain. In other words, deflection is not a good indication of impending structural failure at all.
Sep
21
comment Is this swing beam safe?
Those "standard load calculations" you are using are almost certainly for a static load and aren't applicable to the dynamic loading that a person on a swing would subject the beam to. Tables for dynamic load must exist somewhere for there are plenty of wooden bridges that support the dynamic load of cars crossing. The static load calculations you used, however, won't tell you much about failure under dynamic load.
Sep
3
comment Home security sensor for windows
Answer: You need magnetic contact switches mounted such that they detect whether the windows and/or louvres are open or closed. That way your alarm panel can enforce that they are closed. Judging from the picture you'll probably have the best luck with this surface-mount style contact.