Third Party Certifications

Behind The Walls Video Series: Part 3 of 12

Legend Homes is going to go to a lot of work to make sure that we’ve properly designed and installed your HVAC system, that we’ve properly designed and installed the weather resistant barrier, that we’ve done proper air sealing on your home – we’ve used good details for that – and really done everything we can to keep the inside inside and the outside out.

We also want to verify that we’ve done that correctly. We want to design the process properly. We want to install them properly and them we want to have someone check and make sure that we actually did it properly afterward, so that’s where third-party testing comes in. We use a number of different contractors to do that for us.

Video Transcript

So Legend Homes is going to go to a lot of work to make sure that we’ve properly designed and installed your HVAC system, that we’ve properly designed and installed the weather resistant barrier, that we’ve done proper air sealing on your home – we’ve used good details for that – and really done everything we can to keep the inside inside and the outside out.

We also want to verify that we’ve done that correctly. We want to design the process properly. We want to install them properly and them we want to have someone check and make sure that we actually did it properly afterward, so that’s where third-party testing comes in. We use a number of different contractors to do that for us.

One of the first ones to come in is the moisture testing on the home. So we have a contractor that’s gonna come in after this house has been framed up and they’re gonna run through [with the] moisture meter and probably test 40 places in the home to with the moisture content of the wood is. We want to make sure that’s well below 19% and we want to make sure that’s well below 19% on every wall in the home. The north wall is going to dry differently than the east wall, for that matter, it’s going dry differently at the top than it does at the bottom. They’re going to come through and make sure it’s completely dry for us before we put any drywall on the walls.

They’re also going to come back in after the drywall is on and they’re going to test the floor to make sure before we put any hardwood down or any other flooring surfaces that the floor is nice and dry and at a moisture content where your flooring’s gonna last a long, long time.

When we’re all done with the house, all the drywall is up, it’s all painted and done, they’re going to come through one last time with an RF Detector and they’re going to look for any sources of moisture in the walls on the outside to make sure that we didn’t have a leak or an error somewhere [that] there’s not a plumbing leak. All of those certifications they’re going to give to us [and] we’re going to bundle them up and give them to you at the end of the home [contstruction].

Another set of certifications that we’re going to do is on the duct work. We’ve got all this duct work that we’ve taken care to install within the thermal envelope of your home. We use mastic on the joints for that duct work instead of duct tape. Duct tape falls off within a couple of years when it gets hard and brittle, but mastic is going to stand the test of time. They’re actually going to paint that on. It’s a rubberized sealant that’ll go around that.

And then we’re going to have a contractor come in, seal everything up, apply air pressure to the system and see if and where it leaks. If the system leaks then we have an opportunity to fix that up and make sure it’s patched before we cover it all up with drywall and you know that the air that you pay to heat is staying where we designed it to stay.

As far as the air sealing goes, when we’re all done with the home we want to see how we did as far as keeping the conditioned air inside and the unconditioned air outside. So we’re going to do what is called a Blower Door Test. We’ll have a contractor come in and they’ll take out that front door right there completely. They’ll install a frame in that with a fan. They’re going to depressurize the house to 50 Pascals and then they’re going to see how much air is going able to enter the house from the outside under that air pressure. That’ll give us a good hard number to understand what the air leakage is on the home.

We’ll combine that with any duct leakage testing that we may have done as well as the design numbers that we put together, the insulation values of the exterior walls, the floor, the ceiling. Everything’s on the wall there. We can turn that all into one giant calculation to estimate the energy efficiency of your home.

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