China population now over 1.4 billion as birthrate falls Winfrey details her decision to withdraw from Simmons film Carpio hits red carpet treatment for China Coast Guard PLAY LIST 02:14Carpio hits red carpet treatment for China Coast Guard02:56NCRPO pledges to donate P3.5 million to victims of Taal eruption00:56Heavy rain brings some relief in Australia02:37Calm moments allow Taal folks some respite03:23Negosyo sa Tagaytay City, bagsak sa pag-aalboroto ng Bulkang Taal01:13Christian Standhardinger wins PBA Best Player award Substitute Alyssa Layug then did her part in the end-game scoring two straight points for the Angels’ 23-12 lead before back-to-back errors on the Lady Oragons’ side of the court gave PetroGazz the victory.Cherry Nunag and Anastasiia Trach combined for 17 points to add to the Angels’ cause.Lauren Whyte and Macy Ubben had 17 and 14 points, respectively, but their offensive exploits could not hold off Iriga-Navy’s disastrous 31 errors.ADVERTISEMENT Ancajas, Sultan make weight for super flyweight title bout Sports Related Videospowered by AdSparcRead Next The Angels started out the season with a miserable 0-3 card but have since featured in the winners’ column and improved to 2-3 while the Lady Oragons are in a downward spiral losing three straight to drop to 1-3.Despite losing key players in Wensh Tiu and Rachel Austero, the Angels didn’t lose a step as new import Olena Lymareva-Flink paved the way with 16 points.FEATURED STORIESSPORTSGinebra beats Meralco again to capture PBA Governors’ Cup titleSPORTSAfter winning title, time for LA Tenorio to give back to Batangas folkSPORTSTim Cone, Ginebra set their sights on elusive All-Filipino crown“We’re building a little bit of momentum here and I’m happy with the win we just need to practice more,” said Angels head coach Jerry Yee in Filipino. “Every coach would be happy with how this team played, we just need to go back and practice some more.”Lymareva-Flink, who replaced the injured Kadi Kullerkann, was instrumental for the Angels in the third set with her back-to-back aces giving PetroGazz a 15-7 lead, and the foundation for the victory, in the final frame. Lights inside SMX hall flicker as Duterte rants vs Ayala, Pangilinan anew Steam emission over Taal’s main crater ‘steady’ for past 24 hours PetroGazz maintained its steady climb and dismantled Iriga-Navy along the way with a three-seat beating, 25-22, 30-28, 25-13, to get its second straight win in the Premier Volleyball League Reinforced Conference Saturday at Filoil Flying V Centre.ADVERTISEMENT Jury of 7 men, 5 women selected for Weinstein rape trial Nadine Lustre’s phone stolen in Brazil Dave Chappelle donates P1 million to Taal relief operations MOST READ Volcano watch: Island fissures steaming, lake water receding LATEST STORIES In fight vs corruption, Duterte now points to Ayala, MVP companies as ‘big fish’ Don’t miss out on the latest news and information. View comments
NBPA Executive Director Michele Roberts says the union has “heard our players’ stories and are making mental health a priority now.”Earlier this season, NBA stars Kevin Love of the Cleveland Cavaliers and DeMar DeRozan of the Toronto Raptors revealed issues they’ve struggle with on and off the court. Love detailed his experience with panic attacks and anxiety. DeRozan talked about battles with depression.FEATURED STORIESSPORTSGinebra beats Meralco again to capture PBA Governors’ Cup titleSPORTSAfter winning title, time for LA Tenorio to give back to Batangas folkSPORTSTim Cone, Ginebra set their sights on elusive All-Filipino crown Carpio hits red carpet treatment for China Coast Guard PLAY LIST 02:14Carpio hits red carpet treatment for China Coast Guard02:56NCRPO pledges to donate P3.5 million to victims of Taal eruption00:56Heavy rain brings some relief in Australia02:37Calm moments allow Taal folks some respite03:23Negosyo sa Tagaytay City, bagsak sa pag-aalboroto ng Bulkang Taal01:13Christian Standhardinger wins PBA Best Player award Sports Related Videospowered by AdSparcRead Next China population now over 1.4 billion as birthrate falls Volcano watch: Island fissures steaming, lake water receding Nadine Lustre’s phone stolen in Brazil View comments Lights inside SMX hall flicker as Duterte rants vs Ayala, Pangilinan anew LATEST STORIES Dave Chappelle donates P1 million to Taal relief operations Steam emission over Taal’s main crater ‘steady’ for past 24 hours Don’t miss out on the latest news and information. Winfrey details her decision to withdraw from Simmons film Jury of 7 men, 5 women selected for Weinstein rape trial In fight vs corruption, Duterte now points to Ayala, MVP companies as ‘big fish’ MOST READ FILE – In this May 8, 2018, file photo, Toronto Raptors’ DeMar DeRozan speaks during an end of season NBA basketball press conference at the BioSteel Centre in Toronto. The National Basketball Players Association has hired its first director of mental health and wellness. Dr. William D. Parham will oversee the union’s new program designed to help members with mental health issues. Earlier this season, NBA stars Kevin Love of the Cleveland Cavaliers and DeMar DeRozan of the Toronto Raptors revealed issues they’ve struggle with on and off the court. Love detailed his experience with panic attacks and anxiety. DeRozan talked about battles with depression. (Cole Burston/The Canadian Press via AP, File)NEW YORK — The National Basketball Players Association has hired its first director of mental health and wellness.Dr. William D. Parham will oversee the union’s new program designed to help members with mental health issues. The program will be headquartered in Los Angeles.ADVERTISEMENT 2-time French Open champ reminds: ‘There is also Sharapova’
Liverpool’s lucky keeper calamitiesToby Alderweireld’s own goal lifted Liverpool after Hugo Lloris’s mistake © AFP / Paul ELLISShould Liverpool deliver a first league title in 29 years, Jurgen Klopp believes it will be “a championship of will”.His side showed their staying power once more to see off Tottenham in dramatic fashion, but also had no little luck, not for the first time this season, in an error by the visiting goalkeeper.Hugo Lloris parried the ball in off his own defender Toby Alderweireld to give Liverpool all three points to move back ahead of Manchester City in the title race on Sunday.Everton’s Jordan Pickford gifted Divock Origi a 96th minute winner in similar fashion in the Merseyside derby back in December, while Liverpool were fortunate that 39-year-old Julien Speroni’s only Premier League appearance of the season came at Anfield as he was at fault for at least two goals in a 4-3 win over Crystal Palace.Bernardo ‘the best’Manchester City could not have hoped for an easier start to a hectic final two months of the season as they remain on course for a quadruple of trophies.Pep Guardiola’s men cruised to a 2-0 win at Fulham with Bernardo Silva opening the scoring and then setting up Sergio Aguero to slot home his 29th goal of the season.Silva had to wait for his chance to shine at City, but has been outstanding this season and Guardiola admitted even among a star-studded squad, he is currently one of the first names on the his team-sheet.“Right now with the way he plays I cannot do anything else but put him on the pitch and let him play,” said Guardiola.“He’s so important for us. What he’s done for us is the best.”Sarri gets lucky breakMaurizio Sarri kept his cool as Chelsea hit back to beat Cardiff © AFP / Geoff CADDICKWith just six minutes left at Cardiff, Maurizio Sarri was on the brink of what would have been the worst result of his troubled reign as Chelsea boss.Trailing 1-0 to third bottom Cardiff after a shockingly limp display, Chelsea’s furious fans had subjected the Italian to chants of “We want Sarri out” throughout the second half.Having started with Eden Hazard, N’Golo Kante and in-form England winger Callum Hudson-Odoi on the bench, Sarri was in danger of paying for his bold gamble.But Sarri, who sent on Hazard in the second half, earned a stay of execution in dramatic fashion as Cesar Azpilicueta headed a controversial 84th minute equaliser from an offside position.Then in stoppage-time, Ruben Loftus-Cheek headed the winner from Willian’s cross to cap a much-needed act of escapology from Chelsea.The result kept Chelsea’s bid for a top-four finish intact and may have ensured Sarri avoids the axe, for a while longer at least.Huddersfield plan inquestJan Siewert wants to oversee a major inquest at relegated Huddersfield © AFP / Ian KINGTONHuddersfield manager Jan Siewert admits a detailed inquest is needed after a 2-0 defeat at Crystal Palace confirmed their record-equalling relegation.Siewert’s side join Derby, in 2008, as only the second Premier League team to lose their top-flight status before the end of March.With a miserable 14 points from their 32 games, Huddersfield have equalled the earliest relegation in the Premier League as Siewert failed to save them following his arrival as David Wagner’s replacement.Siewert conceded Huddersfield need root and branch reform at the end of their two-year stay in the Premier League.“I will not talk about bouncing back because at the moment it’s disappointment first of all,” he said.“We need to go through all the details, what happened, what were the reasons.”On-fire RashfordMarcus Rashford put Manchester United on course for victory against Watford © AFP / Paul ELLISMarcus Rashford netted in Manchester United’s 2-1 win over Watford to maintain his fine form since Ole Gunnar Solskjaer took over following Jose Mourinho’s sacking.The timing could not have been better for the 21-year-old, with a new contract worth a reported £150,000-per-week being discussed, as he took his tally to nine goals in the Solskjaer era.Rashford’s goals have seen him all but displace Romelu Lukaku as United’s number one choice as striker and source of goals.Solskjaer will be keen to secure Rashford’s signature on that mooted new deal as quickly as possible.0Shares0000(Visited 1 times, 1 visits today) 0Shares0000Bernardo Silva scored in Manchester City’s 2-0 win at Fulham © AFP / Adrian DENNISLONDON, United Kingdom, Mar 31 – Liverpool rode their luck to return to the top of the table, while Manchester City remain hot on their heels in a thrilling title race.Here are five things we learned from the Premier League this weekend:
0Shares0000Jurgen Klopp hailed Mohamed Salah’s “unbelievable record” for LiverpoolPARIS, France, Jul 31 – Liverpool coach Jurgen Klopp and three players — Mohamed Salah, Sadio Mane and Virgil van Dijk — headed nominations released Wednesday for the FIFA Best awards that will be presented in Milan on September 23.Klopp led Liverpool, and that vital trio of players, to the Champions League trophy and also second place to Manchester City in the Premier League. Also nominated for the award is Algerian tactician Djamel Belmadi who led Les Fennecs to their first Africa Cup of Nations (AFCON) title for the first time since 1990 after beating Senegal 1-0 in the July 19 final in Cairo.Juventus’ Cristiano Ronaldo and Barcelona’s Lionel Messi also make the shortlist for the men’s award along with PSG’s Kylian Mbappe, Tottenham’s Harry Kane, Belgian Eden Hazard and Dutch duo Frenkie de Jong and Matthijs de Ligt.American Alex Morgan and coach Jill Ellis will be favourites for the female player and women’s coach awards after spearheading the USA to the the women’s World Cup title in France last month.The Best FIFA Men’s PlayerCristiano Ronaldo (POR/Juventus); Frenkie de Jong (NED/Ajax/Barcelona); Matthijs de Ligt (NED/Ajax/Juventus); Eden Hazard (BEL/Chelsea/Real Madrid); Harry Kane (ENG/Tottenham); Sadio Mane (SEN/Liverpool); Kylian Mbappe (FRA/Paris Saint-Germain); Lionel Messi (ARG/Barcelona); Mohamed Salah (EGY/Liverpool); Virgil van Dijk (NED/Liverpool)The Best FIFA Women’s PlayerLucy Bronze (ENG/Lyon); Julie Ertz (USA/Chicago Red Stars); Caroline Graham Hansen (NOR/Wolfsburg/Barcelona); Ada Hegerberg (NOR/Lyon); Amandine Henry (FRA/Lyon); Sam Kerr (AUS/Chicago Red Stars/Perth Glory); Rose Lavelle (USA/Washington Spirit); Vivianne Miedema (NED/Arsenal); Alex Morgan (USA/Orlando Pride); Megan Rapinoe (USA/Reign FC); Wendie Renard (FRA/Lyon); Ellen White (ENG/Birmingham City/Manchester City)The Best FIFA Men’s CoachDjamel Belmadi (ALG/Algerian national team); Didier Deschamps (FRA/French national team); Marcelo Gallardo (ARG/River Plate); Ricardo Gareca (ARG/Peruvian national team); Pep Guardiola (ESP/Manchester City); Jurgen Klopp (GER/Liverpool); Mauricio Pochettino (ARG/Tottenham); Fernando Santos (POR/Portuguese national team); Erik ten Hag (NED/Ajax); Tite (BRA/Brazilian national team)The Best FIFA Women’s CoachMilena Bertolini (ITA/Italian national team), Jill Ellis (USA/USA national team), Peter Gerhardsson (SWE/Swedish national team), Futoshi Ikeda (JPN/Japanese U-20 national team); Antonia ‘Tona’ Is (ESP/Spanish U-17 national team), Joe Montemurro (AUS/Arsenal), Phil Neville (ENG/English national team), Reynald Pedros (FRA/Lyon), Paul Riley (ENG/North Carolina Courage), Sarina Wiegman (NED/Dutch national team)0Shares0000(Visited 1 times, 1 visits today)
2. Pedro (Barcelona) – Click right to find out who the final piece of the jigsaw might be… – Last summer Arsenal landed Alexis Sanchez in a brilliant transfer coup and they could return to the Nou Camp for another player this time out. The forward has seen his appearances severely restricted due to the attacking triumvirate of Lionel Messi, Neymar and Luis Suarez. A £24million move could be attractive for all parties involved. Chelsea manager Jose Mourinho has claimed Arsenal are just four top-class players away from having at team who could once again be invincible.“It’s even more difficult to dominate [the Premier League] than before,” said the Portuguese boss.“How can you speak about domination when everyone knows what will happen next summer? Give to Arsenal four top-class players and I think they will again be the Invincibles.”And considering the Gunners have only lost two of their last 18 Premier League matches, it’s actually not such a crazy claim from Mourinho.Back in 2003/04 the Gunners won the Premier League title while going the whole season without a single defeat with Arsene Wenger’s squad including the likes of Thierry Henry, Robert Pires, Patrick Vieira, Ashley Cole, Gilberto Silva, Sol Campbell and… Pascal Cygan.But which four players could conceivable turn the Gunners from also-rans into a second invincible side? talkSPORT takes a look.Click the right arrow to see the four top-class stars Arsenal should sign… 4 4. Signing Ilkay Gundogan from Borussia Dortmund could be the first step in turning Arsenal into the Invincibles again – Click the right arrow for another top-class star who could make Arsenal unbeatable again! – “Give to Arsenal four top-class players and I think they will again be the Invincibles, said Jose Mourinho, but who could those signings be? German midfielder Gundogan is finally getting back to his best after injury problems curtailed his progress at the Westfalenstadion. His playmaking skills from deep could make him the perfect foil for the combative Francis Coquelin. 3. Iker Casillas (Real Madrid) – Click right to see which other La Liga star could join the Gunners… – In recent months David Ospina, a £3million summer signing from Nice, has usurped Wojciech Szczesny but the Colombian has an air of eccentricity about him that suggests a calamity could be just around the corner. But it appears the Gunners prayers could be answered with the news Spain star Casillas is keen on a move to the Emirates. Signing the 33-year-old would see them have a goalkeeper to rival Thibaut Courtois, Hugo Lloris and David De Gea. 4 4 4 1. Mats Hummels (Borussia Dortmund) – If Arsenal are to go another season undefeated the key will be their defence. When they went unbeaten they only conceded 26 goals, while this season they have let in 36 already, although this is still the third best in the Premier League. Per Mertesacker is on the wane as an elite centre-back and Gabriel is still adjusting to life in England, a move for World Cup winner Hummels would see Laurent Koscielny play alongside a truly brilliant defender.
THE COUNTDOWN is on to tomorrow’s Harvey’s Point Bluestack Challenge.This sponsored hill-walk was established to raise funds to support People with Special Needs in County Donegal.On Saturday, walkers, comprising of people from the four corners of Ireland and beyond, will arrive at Harvey’s Point to take part in the Bluestack Challenge Walk. Members of organisations, sports clubs, businesses and charities are being positively encouraged by the Bluestack Foundation to join in the fun – either as individuals or as groups or to offer sponsorship to anyone they know is participating. Such donations can be made through the Challenge web site (click here www.hpbc.ie) where you can donate money to any individual walker, allowing donations to be made from all around the world.You can also contact the office on 074 97 40828 (office hours) or Mobile 087 1226612 and request an application form or make a donation.Alternatively information can be obtained by emailing email@example.com.The Harvey’s Point Bluestack Challenge 2011 Walk is both a ‘fun’ walk and a ‘sponsored’ walk. Patrick McBrearty, of the Bluestack Special Needs Foundation said: “To date we have walkers registered from 29 counties in Ireland while others are traveling from the UK and the USA.“This year’s walk is the most spectacular yet. We will take walkers to the highest point in the Bluestacks and then to visit the site of the World War II plane crash.“Although going to the highest point, we have identified a route that will make it possible for walkers of all abilities (with a reasonable level of fitness) to complete this challenge.“Our team of experienced guides will be backed up by Civil Defence and Mountain Rescue, while our organizing committee will ensure a very enjoyable experience in terms of facilities and refreshments.“Tea, coffee and scones will be provided at the start of the walk to get everyone off to a good start. At the first major stop, the army will serve up breakfast baps, again with tea or coffee. “En route to the summit we will have regular water stops and possibly a few surprises. Our goal on the day is to make this a most enjoyable experience for all.“Every contribution makes a difference and funds raised will go towards making a positive change in the lives of People with Special Needs throughout County Donegal.”COUNTDOWN ON TO SATURDAY’S BIGGEST BLUESTACK CHALLENGE EVER! was last modified: June 17th, 2011 by gregShare this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window)
DONEGAL’S glorious March heatwave is continuing today – with temperatures in Malin warmer than in MILAN!Ireland’s most northerly point is touching 20C today.And that is making Donegal warmer than it is in parts of Italy, Greece and France. The good news is we should have the same heat right through until Thursday.And although temperatures will fall back to around 13C on Friday, the weekend is currently predicted to be dry.Said a Met Eireann spokesman: “Friday will be mainly dry again though Northern and Northeastern parts will probably be dull, and there is also likely to be a good deal of cloud around elsewhere with a little brightness at times.“As a result it will be cooler than recently with highest temperatures of 10 to 16 C, warmest in southern coastal counties in a moderate northwesterly wind. “The weekend is looking mainly dry also with a mix of cloud and sunny spells. Daytime temperatures will range around 10 to 15 degrees and nights will be cold with frost and fog where cloud breaks. Winds will be mostly light Northerly or variable.“Little change for Monday mainly dry with variable cloud in a moderate Northwest win.”We’ll not complain about that! JUST GLORIOUS: WARMER IN MALIN THAN IT IS IN MILAN! was last modified: March 27th, 2012 by BrendaShare this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window) Tags:donegal weatherJUST GLORIOUS: WARMER IN MALIN THAN IT IS IN MILAN!sunshine
Wilson High School running back Daniel Bernal scored five touchdowns –four rushing and one on a 60-yard interception return – to lead the Wildcats football team to a 48-7 win over Garey High at Ganesha High on Friday night. Bernal had to leave last week’s loss to South El Monte with an injury but was back leading the Wildcats offense on Friday. AD Quality Auto 360p 720p 1080p Top articles1/5READ MOREWalnut’s Malik Khouzam voted Southern California Boys Athlete of the Week The Wildcats scored the game’s first 28 points. The win improved Wilson to 4-2, and more importantly got the Wildcats off to a 1-0 start in Miramonte League play. Wilson’s defense bounced back from a bad performance last week to limit the Vikings to 124 yards of total offense. “It certainly helps make us feel a lot better,” Oviedo said of the win. “Defensively, we were a whole lot better than last week.” At Temple City 49, San Marino 9 The junior rushed for 186 yards on 21 carries. Wilson also got a big game out of receiver Iran Blandon, who had five receptions for 177 yards. “It was very reassuring to see him back in there doing what he does best,” Wilson coach Robert Oviedo said. “It was a typical Daniel Bernal game. He seemed to do everything. It was pretty electrifying.” Seniors Sammy Yu and Sushi Tsai scored three touchdowns each to lift Temple City High School to an easy victory over San Marino High in a Rio Hondo League opener for both schools. Yu — a 5-foot-7, 160-pound running back-defensive back — scored on a 49-yard pass, a 37-yard pass interception return and a 25-yard return of a blocked punt. Tsai — a 5-7, 165-pound running back — scored on runs of 1, 33 and 5 yards as the Rams (3-3) opened a 27-6 halftime lead and cruised to the victory. Tsai led all rushers with 136 yards on 17 carries. Yu carried only four times but gained 31 yards. Junior defensive lineman Kyle O’Malley opened the scoring for the Rams, picking up a fumble and returning it 2 yards for the score with 3:14 left in the first quarter. Temple City finished with 295 yards offense — 215 rushing and 80 passing. Rams junior quarterback Riley Saxon completed 7 of 13 passes and was not intercepted. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set!
Start Free Trial Already a member? Log in Sign up for a free trial and get instant access to this article as well as GBA’s complete library of premium articles and construction details. This article is only available to GBA Prime Members UPDATED on June 24, 2018 with new product informationTwenty years ago, very few residential builders knew what a rainscreen was. These days, however, it’s no longer unusual to see siding being installed on vertical furring strips or a plastic drainage mat. As rainscreens become more common, mainstream builders are beginning to ask, “What’s a rainscreen? How do I know if I need one?”This article will pull together information to answer the most common questions about rainscreen gaps between siding and sheathing.You can’t really point to a rainscreen, because it isn’t a thing — it’s a system. That’s why I prefer to talk about a “rainscreen installation,” a “rainscreen approach,” or a “rainscreen gap.”For most residential builders, a rainscreen siding installation is one that includes an air gap between the siding and the water-resistive barrier (the asphalt felt or housewrap).Some purists insist that you can’t call it a rainscreen gap unless you have ventilation gaps at the top of the wall as well as the bottom of the wall. If it only has drainage gaps at the bottom, but no openings at the top, the purists insist that the system is more accurately called a “cavity wall.”However, the distinction between a cavity wall and a rainscreen wall isn’t particularly useful — in part because the distinction is based on a faulty understanding of “pressure equalization” principles — so I side with those who use the word “rainscreen” for either type of wall.Every well-designed rainscreen wall needs:Ventilation openings at the top of the wall are optional.Rainscreen gaps help walls manage moisture. A rainscreen gap helps to dry the sheathing, which may accumulate moisture during cold weather. It also helps to dry the siding when it is soaked by rain.These…
The role and responsibilities of spray foam contractorsIf I were a spray polyurethane foam (SPF) insulation contractor, I’d do like they all do and make sure that every potential customer I talked to knew about SPF’s air sealing qualities. (I would not, however, try to sell people on fantasy R-values of 20 or 40 per inch, which I have known some SPF contractors to do.) RELATED ARTICLES Designing a Good Ventilation System GBA Encyclopedia: Ventilation ChoicesAre HRVs Cost-Effective?HRV or ERV?Ventilation Rates and Human HealthHow Much Fresh Air Does Your Home Need?Questions and Answers About Air BarriersSpray Foam Insulation Is Not a Magic Bullet Then I’d do what not nearly enough spray foam contractors do: I’d tell all my customers they need to install a mechanical ventilation system in every new home with spray foam. In fact, I’d include mechanical ventilation as one of the things I sell. (Maybe that’s just because I’d rather be an HVAC contractor, though.)If a client didn’t want me to do the ventilation, I’d have them sign a liability waiver acknowledging that they have been informed about the importance of mechanical ventilation in airtight homes. Then I’d have that piece of paper so I could pull it out if the homeowner ever came after me for poor indoor air quality.I’m not the only one saying that ventilation needs to be part of new homes with spray foam insulation. Recently, Mac Sheldon of Demilec emailed me about this issue and wrote, “I’m telling… preaching… admonishing… SPF contractors to never pull the trigger on a spray foam job until there’s a ventilation plan in place.”I believe that spray foam insulation can be an effective product to use in building enclosures. I also know that spray foam can be done poorly. No matter which way it’s done, however, mechanical ventilation is not optional in airtight homes. I wonder how many spray foam contractors will find that out the hard way. Most installations of spray foam insulation, when properly installed, act as an air barrier. When you use it instead of the fluffy stuff (fiberglass, cellulose, cotton), a house will be more airtight. That’s good.When a house is airtight, the nasties in the indoor air tend to stick around. Volatile organic compounds (VOCs), water vapor, odors, radon, and other stuff you don’t want to immerse yourself in make the home’s indoor air quality worse.How do you solve this problem? Mechanical ventilation. Well, source reduction and separation would come first, but airtight homes need mechanical ventilation. Allison Bailes of Decatur, Georgia, is a speaker, writer, energy consultant, RESNET-certified trainer, and the author of the Energy Vanguard Blog. Check out his in-depth course, Mastering Building Science at Heatspring Learning Institute, and follow him on Twitter at @EnergyVanguard.