那是氡气问题最严重的地方,很多洋人都在说想搬走。。。升值空间不会太大,也不值得吧。
Warranty 2 yrs + one day -7 years (Major Structural Defect) If your home was built before 2012 this is where TARION will fund the radon mitigation directly. If your home was built after 2012 Tarion may hand this back to your builder for the work to be completed. Tarion will support your insistence that the work be completed by a C-NRPP certified radon mitigator who is insured for radon mitigation work.
Here is the Ontario Building code (20120 references ) that the TARION document references.
9.1.1.7. Radon
(1) In addition to all other requirements, a
building in the following designated areas shall be designed and constructed so that the annual average
concentration of radon 222 does not exceed 200 Bq/m3 of air and the annual average concentration of the short lived daughters of radon 222 does not exceed 0.02 working levels inside the
building for,
(a) the City of Elliot Lake in the Territorial District of Algoma,
(b) the Township of Faraday in the County of Hastings, and
(c) the geographic Township of Hyman in the Territorial District of Sudbury.
9.13.4. Soil Gas Control
9.13.4.1. Soil Gas Control
(1) Where methane or radon gases are known to be a problem, construction shall comply with the requirements for
soil gas control in MMAH
Supplementary Standard SB-9, “Requirements for Soil Gas Control”.
9.13.4.2. Required Soil Gas Control
(1) Except as provided in Sentence (2), all wall, roof and floor assemblies in contact with the ground shall be constructed to resist the leakage of
soil gas from the ground into the
building.
(2) Construction to resist leakage of
soil gas into the
building is not required for,
(a) garages and unenclosed portions of
buildings,
(b)
buildings constructed in areas where it can be demonstrated that
soil gas does not constitute a hazard, or
(c)
buildings that contain a single
dwelling unit and are constructed to provide for subfloor depressurization in accordance with MMAH Supplementary Standard SB-9, “Requirements for Soil Gas Control”.
(3) Where
soil gas control is required, a
soil gas barrier shall be installed at walls and roofs in contact with the ground according to MMAH Supplementary Standard SB-9, “Requirements for Soil Gas Control”.
(4) Where
soil gas control is required, it shall consist of one of the following at floors in contact with the ground:
(a) a
soil gas barrier installed according to MMAH Supplementary Standard SB-9, “Requirements for Soil Gas Control”, or
(b) where the
building contains a single
dwelling unit only a subfloor depressurization system installed according to MMAH Supplementary Standard SB-9, “Requirements for Soil Gas Control”.