Mould or mold, and why Toronto firms differ

Same word, two spellings

Mould and mold name the same growth. Mould is the Canadian and British spelling and mold the American one, and nothing about the growth itself changes with the letter. What changes is which spelling a homeowner meets, and in Toronto restoration that depends on who is writing.

Health Canada writes mould. Its Guide to addressing moisture and mould indoors, published in January 2023, uses the Canadian form throughout its own text. The American form turns up only in the guide's reference list, in works it cites. One of those works is the IICRC's S520 standard, which the guide cites for its six-step process to prepare for mould cleanup and lists as the ANSI/IICRC S520 Standard and IICRC R520 Reference Guide for Professional Mold Remediation.

The trade's certification bodies lean the other way. The IICRC's Mold Remediation Specialist FAQ names its mould standard as the ANSI/IICRC S520 Standard for Professional Mold Remediation, and the Professional Mold Inspection Institute spells it the same way on its Ontario page. A homeowner can read federal guidance in one spelling and a certification in the other, and both describe the same work.

How the company names split

The count here is a whole-word match on each company name as the index records it, ignoring capitals. On that rule, 44 of the 294 names contain mold as a separate word and five contain mould. No name uses both. Two more run the letters into a longer word, MoldCare and IGOTMOULD, which a whole-word match passes over in either direction. That makes 51 names with the word visible at all.

The larger number sits on the other side. Of the 294 names, 243 carry neither spelling. They are names such as Restoration Mate, Air Doctors, CleanFirst Restoration and Xtreme Controls, and 158 of the 243 are tagged for mould removal anyway. A trading name is a branding choice. The services a company is listed for sit in its category tags.

The name does not guarantee the tag either. Of the 44 records with mold in the name, 35 carry the Mold Removal tag and 27 carry Mold Inspection & Testing, which leaves nine with the word in the name and no Mold Removal tag. Seven of those nine carry only Water Damage Restoration, among them Mold Assist of Brampton and Water Damage Toronto Mold Removal Inc., and the other two carry only Mold Inspection & Testing. All five mould-spelled records carry the Mold Removal tag.

Forty-four names, far fewer brands

The 44 is not 44 separate naming decisions. Mold Assist accounts for 16 of them on its own, with at least one record in each of the 12 areas that have a page on this site, from Ajax to Whitby. That one name is more than a third of all the mold-spelled names in the index.

Two more names repeat. GTA Mold Removal has four records and Absolute Mold Remediation has four, so three names make up 24 of the 44. The other 20 records carry 20 different names. One brand with many branch records can move a count like this on its own.

Repeated names are common across the index, and most of them avoid the word. PuroClean has 12 records, ServiceMaster Restore 10, CPR24 Restoration seven, Paul Davis six, WINMAR five and ONT Restoration five. None of those spells mould or mold in its name, except one of the five ONT Restoration records.

Where each spelling sits on the map

The five mould-spelled names are spread thin. Two are filed under Toronto, GeoFocus Mould Solutions and The Preferred Group Restoration, and one each under Burlington, Scarborough and Pickering. Their review counts run from 12 to 75.

The 44 mold-spelled names are spread wider: 16 under Toronto, five under Brampton, three each under Mississauga and Burlington, and two each under Richmond Hill, Pickering, Oakville and Oshawa. The remaining nine sit one to an area. Three of the four areas holding a mould-spelled name also hold mold-spelled ones, so neither spelling is confined to one part of the map in this index.

None of this is a coverage map. The index files each company under the place nearest its Google map pin, and nothing in the dataset records a service area, so a company filed under Burlington may or may not work in Scarborough. The way to find out is to ask the company.

Two Burlington records, one letter apart

The sharpest case sits in one area. The index holds a record for Absolute Mold Remediation Ltd., rated 4.9 from 80 reviews, and a separate record for Absolute Mould Remediation Ltd., rated 4.9 from 75 reviews. Both are filed under Burlington, and the names differ by a single letter.

The Absolute name appears three more times, filed under Bloor West Village, Mississauga and Toronto, all with the American spelling. All five records list pages on the same website, absolutemoldremoval.ca, and the mould-spelled record points to a Hamilton page on it. The index can go no further than that. No record here carries an ownership field, a parent company or a registration number, so it cannot say whether these are branches of one business or separate ones.

For a homeowner the effect is small but real. A whole-word match on one spelling finds one of the two Burlington records and not the other, and the two carry the same rating on similar review counts. Anyone comparing quotes there could take them for two unrelated firms, or for one firm twice, and the directory does not settle it.

What the companies' own websites say

Names are only part of the picture. For 241 of the 294 companies, the index stored text from the company's own website, capped at 2,500 characters each. In that text, 137 companies use only mold, 58 use only mould, 21 use both and 25 use neither.

The Canadian spelling does far better on the companies' pages than in their names. Mould appears in the stored text of 79 companies, against five that put it in their name as a word. It runs both ways: two of the five mould-named companies use only mold in their stored text, and IGOTMOULD's stored text uses both.

Even a single record can carry both spellings. IGOTMOULD lists its website as igotmold.com, MOLD REMOVAL TORONTO LTD lists mouldexpertstoronto.com, and Absolute Mould Remediation Ltd. lists a page on absolutemoldremoval.ca. The letter in a name, the web address and the page copy can all disagree inside one record.

What the spelling does not tell you

This site's category names use the American form. Its four category hubs are Water Damage Restoration, Mold Removal, Fire & Smoke Restoration and Mold Inspection & Testing, the same spelling 44 of the 49 whole-word company names use. The site has no company-name search. It lists companies by service category and by area, and neither depends on how a name is spelled, so the Mold Removal page lists all 200 companies tagged for that work, whatever their names say.

The letter carries no credential in either direction. The Professional Mold Inspection Institute's Ontario page says there is currently no provincial licensing required to become a mold remediator in Ontario, so nothing legal separates a firm that spells it one way from a firm that spells it the other. This site does not verify any company's IICRC certification, as its methodology says, and Ontario licenses nobody for mould removal sets out the voluntary credentials that do exist.

Ratings do not separate the spellings. The 42 rated companies whose names use mold as a word average 4.93, and the five rated companies whose names use mould average 4.94, against 4.76 across all 277 rated companies in the index. Five records are too few to compare with anything, so these averages say nothing about which spelling marks better work.

Nor is the price in the name. The mould removal cost guide sets out what named sources publish for the Toronto area, and why two quotes for one basement differ so much explains how two quotes can price two different jobs.