NORTH PHILADELPHIA (WPVI) -- As preparations continue for the Democratic National Convention, there's a special project going on in North Philadelphia spearheaded by Democrats, volunteers and local carpenters.
It's an effort to build homes for the homeless.
The ambitious project aims to have all of the framing done on four houses in just two days.
The carpenters union says it's their way of welcoming the DNC to Philadelphia.
The Builders' Challenge happens to coincide with the Democratic National Convention, but the union is using it as an opportunity to volunteer and give the DNC support.
Friday and Saturday they will brave the heat, wearing their fluorescent DNC shirts.
Habitat for Humanity Philadelphia said it's grateful for the skilled labor. This is the third year Local 158 has shown its support.
"They will complete from the first-floor decking all the way up to the roof on top of these four homes at Diamond Park," said Habitat for Humanity Associate Executive Director Corinne O'Connell.
The carpenters are saving Habitat for Humanity $10,000 per house.
The recipients of these homes must work 350 hours for Habitat for Humanity to qualify for a zero-percent mortgage.
The Builders' Challenge is happening Friday and Saturday.
On Monday, Habitat for Humanity has invited the delegates from the DNC to come volunteer and help finish the homes.
Carpenters volunteer to help homeless, support DNC in North Philadelphia